From 5ff8bda99e4359b191f9674d54aa5631cd43c7cb Mon Sep 17 00:00:00 2001
From: hailin <hailin.zhao@gdzx.xyz>
Date: Sat, 7 Mar 2026 22:33:40 -0800
Subject: [PATCH] =?UTF-8?q?feat(notification):=20=E5=AE=8C=E6=95=B4?=
 =?UTF-8?q?=E7=AB=99=E5=86=85=E6=B6=88=E6=81=AF=E6=8E=A8=E9=80=81=E4=BD=93?=
 =?UTF-8?q?=E7=B3=BB=20(Phase=201-4)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

## Phase 1 — 精准推送基础
- 新增 notification-service 微服务 (port 3013)
- DB迁移 007: notifications, notification_reads, notification_tenant_targets 表
- DB迁移 008: tenant_tags, tenant_tag_assignments, notification_user_targets 表
  + notifications 表新增 target_tag_ids/target_tag_logic/target_plans/target_statuses/channel_key 字段
- auth-service: TenantTagController — 租户标签 CRUD + 批量分配 (9个接口)
- notification-service 支持 7 种推送目标类型:
  ALL / SPECIFIC_TENANTS / SPECIFIC_USERS / BY_TENANT_TAG(ANY|ALL) / BY_PLAN / BY_TENANT_STATUS / BY_SEGMENT
- Web Admin: /tenant-tags 标签管理页 + 通知表单全面扩展

## Phase 2 — 通知频道与用户偏好
- DB迁移 009: notification_channels (6个预置频道) + user_notification_preferences
  + notification_segment_members 表 (Phase 4 人群包)
- notification-service: ChannelRepository + NotificationChannelController
  (频道 CRUD + 用户偏好 API，强制频道不可关闭)
- Web Admin: /notification-channels 频道管理页
- Flutter: NotificationPreferencesPage — 用户按频道 toggle 订阅，profile页新增入口

## Phase 3 — Campaign 活动与数据分析
- DB迁移 010: notification_campaigns, campaign_execution_log, notification_event_log 表
- notification-service: CampaignRepository + CampaignAdminController
  (ONCE/RECURRING调度, 排期/取消/删除, 发送量/阅读率统计)
- Web Admin: /campaigns 推送活动管理页 (状态机 + 数据统计弹窗)

## Phase 4 — 事件触发与人群包
- EventTriggerService: Redis Stream 消费者，监听并自动创建通知:
  billing.payment_failed / billing.quota_warning / tenant.registered / alert.fired
- SegmentRepository + SegmentAdminController (全量同步/增量添加/删除)
- Web Admin: /segments 人群包管理页 (成员管理 + ETL全量替换)

## 基础设施
- Kong: 新增 notification-service 服务 + 6条路由 + JWT插件
- Docker Compose: 新增 notification-service 容器 (13013:3013)
- notification-service 新增 ioredis 依赖 (Redis Stream 消费)

## Flutter (APK需手动编译)
- 新增路由: /notifications/inbox, /notifications/preferences
- 新增: NotificationInboxPage, NotificationPreferencesPage
- 新增: ForceReadNotificationDialog (强制阅读拦截弹窗)
- profile页: 站内消息行(未读角标) + 通知偏好设置入口

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 deploy/docker/docker-compose.yml              |  33 +
 .../src/app/(admin)/campaigns/page.tsx        | 488 ++++++++++++
 .../(admin)/notification-channels/page.tsx    | 297 ++++++++
 .../src/app/(admin)/notifications/page.tsx    | 705 ++++++++++++++++++
 .../src/app/(admin)/segments/page.tsx         | 320 ++++++++
 .../src/app/(admin)/tenant-tags/page.tsx      | 279 +++++++
 .../src/domain/entities/notification.ts       | 102 +++
 .../src/domain/entities/tenant-tag.ts         |  29 +
 .../src/i18n/locales/en/sidebar.json          |   5 +
 .../src/i18n/locales/zh/sidebar.json          |   5 +
 .../api-notification.repository.ts            |  76 ++
 .../repositories/api-tenant-tag.repository.ts |  76 ++
 .../components/layout/sidebar.tsx             |  10 +
 it0_app/lib/core/router/app_router.dart       |  10 +
 .../data/in_site_notification.dart            |  90 +++
 .../data/in_site_notification_repository.dart |  50 ++
 .../data/notification_channel.dart            |  31 +
 .../pages/notification_inbox_page.dart        | 364 +++++++++
 .../pages/notification_preferences_page.dart  | 241 ++++++
 .../providers/notification_providers.dart     |  37 +-
 .../force_read_notification_dialog.dart       | 179 +++++
 .../presentation/pages/profile_page.dart      |  62 ++
 packages/gateway/config/kong.yml              |  65 ++
 .../services/auth-service/src/auth.module.ts  |   7 +-
 .../entities/tenant-tag-assignment.entity.ts  |  16 +
 .../src/domain/entities/tenant-tag.entity.ts  |  25 +
 .../rest/controllers/tenant-tag.controller.ts | 194 +++++
 .../notification-service/package.json         |  31 +
 .../services/event-trigger.service.ts         | 157 ++++
 .../entities/notification-read.entity.ts      |  33 +
 .../notification-tenant-target.entity.ts      |  17 +
 .../domain/entities/notification.entity.ts    | 106 +++
 .../repositories/campaign.repository.ts       | 187 +++++
 .../repositories/channel.repository.ts        | 127 ++++
 .../repositories/notification.repository.ts   | 364 +++++++++
 .../repositories/segment.repository.ts        |  93 +++
 .../controllers/campaign-admin.controller.ts  | 168 +++++
 .../notification-admin.controller.ts          | 150 ++++
 .../notification-channel.controller.ts        | 133 ++++
 .../notification-user.controller.ts           |  73 ++
 .../controllers/segment-admin.controller.ts   | 110 +++
 .../services/notification-service/src/main.ts |  30 +
 .../src/notification.module.ts                |  48 ++
 .../notification-service/tsconfig.json        |  20 +
 .../007-create-notification-tables.sql        |  55 ++
 .../migrations/008-create-tenant-tags.sql     |  55 ++
 .../009-create-notification-channels.sql      |  53 ++
 .../010-create-notification-campaigns.sql     |  77 ++
 48 files changed, 5879 insertions(+), 4 deletions(-)
 create mode 100644 it0-web-admin/src/app/(admin)/campaigns/page.tsx
 create mode 100644 it0-web-admin/src/app/(admin)/notification-channels/page.tsx
 create mode 100644 it0-web-admin/src/app/(admin)/notifications/page.tsx
 create mode 100644 it0-web-admin/src/app/(admin)/segments/page.tsx
 create mode 100644 it0-web-admin/src/app/(admin)/tenant-tags/page.tsx
 create mode 100644 it0-web-admin/src/domain/entities/notification.ts
 create mode 100644 it0-web-admin/src/domain/entities/tenant-tag.ts
 create mode 100644 it0-web-admin/src/infrastructure/repositories/api-notification.repository.ts
 create mode 100644 it0-web-admin/src/infrastructure/repositories/api-tenant-tag.repository.ts
 create mode 100644 it0_app/lib/features/notifications/data/in_site_notification.dart
 create mode 100644 it0_app/lib/features/notifications/data/in_site_notification_repository.dart
 create mode 100644 it0_app/lib/features/notifications/data/notification_channel.dart
 create mode 100644 it0_app/lib/features/notifications/presentation/pages/notification_inbox_page.dart
 create mode 100644 it0_app/lib/features/notifications/presentation/pages/notification_preferences_page.dart
 create mode 100644 it0_app/lib/features/notifications/presentation/widgets/force_read_notification_dialog.dart
 create mode 100644 packages/services/auth-service/src/domain/entities/tenant-tag-assignment.entity.ts
 create mode 100644 packages/services/auth-service/src/domain/entities/tenant-tag.entity.ts
 create mode 100644 packages/services/auth-service/src/interfaces/rest/controllers/tenant-tag.controller.ts
 create mode 100644 packages/services/notification-service/package.json
 create mode 100644 packages/services/notification-service/src/application/services/event-trigger.service.ts
 create mode 100644 packages/services/notification-service/src/domain/entities/notification-read.entity.ts
 create mode 100644 packages/services/notification-service/src/domain/entities/notification-tenant-target.entity.ts
 create mode 100644 packages/services/notification-service/src/domain/entities/notification.entity.ts
 create mode 100644 packages/services/notification-service/src/infrastructure/repositories/campaign.repository.ts
 create mode 100644 packages/services/notification-service/src/infrastructure/repositories/channel.repository.ts
 create mode 100644 packages/services/notification-service/src/infrastructure/repositories/notification.repository.ts
 create mode 100644 packages/services/notification-service/src/infrastructure/repositories/segment.repository.ts
 create mode 100644 packages/services/notification-service/src/interfaces/rest/controllers/campaign-admin.controller.ts
 create mode 100644 packages/services/notification-service/src/interfaces/rest/controllers/notification-admin.controller.ts
 create mode 100644 packages/services/notification-service/src/interfaces/rest/controllers/notification-channel.controller.ts
 create mode 100644 packages/services/notification-service/src/interfaces/rest/controllers/notification-user.controller.ts
 create mode 100644 packages/services/notification-service/src/interfaces/rest/controllers/segment-admin.controller.ts
 create mode 100644 packages/services/notification-service/src/main.ts
 create mode 100644 packages/services/notification-service/src/notification.module.ts
 create mode 100644 packages/services/notification-service/tsconfig.json
 create mode 100644 packages/shared/database/migrations/007-create-notification-tables.sql
 create mode 100644 packages/shared/database/migrations/008-create-tenant-tags.sql
 create mode 100644 packages/shared/database/migrations/009-create-notification-channels.sql
 create mode 100644 packages/shared/database/migrations/010-create-notification-campaigns.sql

diff --git a/deploy/docker/docker-compose.yml b/deploy/docker/docker-compose.yml
index 8fd7303..55e4ac6 100644
--- a/deploy/docker/docker-compose.yml
+++ b/deploy/docker/docker-compose.yml
@@ -71,6 +71,8 @@ services:
         condition: service_healthy
       referral-service:
         condition: service_healthy
+      notification-service:
+        condition: service_healthy
     healthcheck:
       test: ["CMD", "kong", "health"]
       interval: 10s
@@ -469,6 +471,37 @@ services:
     networks:
       - it0-network
 
+  notification-service:
+    build:
+      context: ../..
+      dockerfile: Dockerfile.service
+      args:
+        SERVICE_NAME: notification-service
+        SERVICE_PORT: 3013
+    container_name: it0-notification-service
+    restart: unless-stopped
+    ports:
+      - "13013:3013"
+    environment:
+      - DB_HOST=postgres
+      - DB_PORT=5432
+      - DB_USERNAME=${POSTGRES_USER:-it0}
+      - DB_PASSWORD=${POSTGRES_PASSWORD:-it0_dev}
+      - DB_DATABASE=${POSTGRES_DB:-it0}
+      - NOTIFICATION_SERVICE_PORT=3013
+      - JWT_SECRET=${JWT_SECRET:-dev-jwt-secret}
+    healthcheck:
+      test: ["CMD-SHELL", "node -e \"require('http').get('http://localhost:3013/',r=>{process.exit(r.statusCode<500?0:1)}).on('error',()=>process.exit(1))\""]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 15s
+    depends_on:
+      postgres:
+        condition: service_healthy
+    networks:
+      - it0-network
+
   # ===== LiveKit Infrastructure =====
   # NOTE: livekit-server, voice-agent, voice-service use host networking
   # to eliminate docker-proxy overhead for real-time audio (WebRTC UDP).
diff --git a/it0-web-admin/src/app/(admin)/campaigns/page.tsx b/it0-web-admin/src/app/(admin)/campaigns/page.tsx
new file mode 100644
index 0000000..b2fd1e0
--- /dev/null
+++ b/it0-web-admin/src/app/(admin)/campaigns/page.tsx
@@ -0,0 +1,488 @@
+'use client';
+
+import { useState, useEffect, useCallback } from 'react';
+import { Megaphone, Plus, RefreshCw, Pencil, Trash2, X, BarChart2, Play, Ban } from 'lucide-react';
+import { cn } from '@/lib/utils';
+
+type CampaignStatus = 'DRAFT' | 'SCHEDULED' | 'RUNNING' | 'COMPLETED' | 'CANCELLED' | 'FAILED';
+type ScheduleType = 'ONCE' | 'RECURRING';
+
+interface Campaign {
+  id: string;
+  name: string;
+  description: string | null;
+  status: CampaignStatus;
+  notificationId: string | null;
+  scheduleType: ScheduleType;
+  scheduledAt: string | null;
+  cronExpr: string | null;
+  timezone: string;
+  nextRunAt: string | null;
+  lastRunAt: string | null;
+  targetCount: number;
+  sentCount: number;
+  readCount: number;
+  createdBy: string | null;
+  createdAt: string;
+  updatedAt: string;
+}
+
+interface CampaignStats {
+  targetCount: number;
+  sentCount: number;
+  readCount: number;
+  readRate: number;
+  executions: any[];
+}
+
+function getAuthHeaders(): HeadersInit {
+  const token = typeof window !== 'undefined' ? localStorage.getItem('token') : null;
+  return { Authorization: `Bearer ${token ?? ''}`, 'Content-Type': 'application/json' };
+}
+
+const BASE = '/api/proxy/api/v1/notifications/campaigns';
+
+async function listCampaigns(params: { status?: string; limit?: number; offset?: number }) {
+  const q = new URLSearchParams();
+  if (params.status) q.set('status', params.status);
+  if (params.limit != null) q.set('limit', String(params.limit));
+  if (params.offset != null) q.set('offset', String(params.offset));
+  const res = await fetch(`${BASE}?${q}`, { headers: getAuthHeaders() });
+  if (!res.ok) throw new Error(`${res.status}`);
+  return res.json() as Promise<{ items: Campaign[]; total: number }>;
+}
+
+async function createCampaign(dto: any) {
+  const res = await fetch(BASE, { method: 'POST', headers: getAuthHeaders(), body: JSON.stringify(dto) });
+  if (!res.ok) throw new Error(`${res.status}`);
+  return res.json();
+}
+
+async function updateCampaign(id: string, dto: any) {
+  const res = await fetch(`${BASE}/${id}`, { method: 'PUT', headers: getAuthHeaders(), body: JSON.stringify(dto) });
+  if (!res.ok) throw new Error(`${res.status}`);
+  return res.json();
+}
+
+async function scheduleCampaign(id: string, dto: { scheduledAt?: string; cronExpr?: string; timezone?: string }) {
+  const res = await fetch(`${BASE}/${id}/schedule`, { method: 'POST', headers: getAuthHeaders(), body: JSON.stringify(dto) });
+  if (!res.ok) throw new Error(`${res.status}`);
+  return res.json();
+}
+
+async function cancelCampaign(id: string) {
+  const res = await fetch(`${BASE}/${id}/cancel`, { method: 'POST', headers: getAuthHeaders() });
+  if (!res.ok) throw new Error(`${res.status}`);
+  return res.json();
+}
+
+async function deleteCampaign(id: string) {
+  const res = await fetch(`${BASE}/${id}`, { method: 'DELETE', headers: getAuthHeaders() });
+  if (!res.ok) throw new Error(`${res.status}`);
+}
+
+async function getCampaignStats(id: string): Promise<CampaignStats> {
+  const res = await fetch(`${BASE}/${id}/stats`, { headers: getAuthHeaders() });
+  if (!res.ok) throw new Error(`${res.status}`);
+  return res.json();
+}
+
+/* ---------- Status badge ---------- */
+
+const STATUS_STYLE: Record<CampaignStatus, string> = {
+  DRAFT: 'bg-gray-100 text-gray-600',
+  SCHEDULED: 'bg-blue-100 text-blue-700',
+  RUNNING: 'bg-yellow-100 text-yellow-700',
+  COMPLETED: 'bg-green-100 text-green-700',
+  CANCELLED: 'bg-gray-100 text-gray-500',
+  FAILED: 'bg-red-100 text-red-700',
+};
+const STATUS_LABEL: Record<CampaignStatus, string> = {
+  DRAFT: '草稿', SCHEDULED: '已排期', RUNNING: '执行中',
+  COMPLETED: '已完成', CANCELLED: '已取消', FAILED: '失败',
+};
+
+/* ---------- Stats Modal ---------- */
+
+function StatsModal({ campaignId, name, onClose }: { campaignId: string; name: string; onClose: () => void }) {
+  const [stats, setStats] = useState<CampaignStats | null>(null);
+  const [loading, setLoading] = useState(true);
+
+  useEffect(() => {
+    getCampaignStats(campaignId)
+      .then(setStats)
+      .catch(console.error)
+      .finally(() => setLoading(false));
+  }, [campaignId]);
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/40 p-4">
+      <div className="bg-card w-full max-w-lg rounded-xl shadow-xl border flex flex-col">
+        <div className="flex items-center justify-between px-6 py-4 border-b">
+          <h2 className="text-base font-semibold">{name} — 数据统计</h2>
+          <button onClick={onClose} className="text-muted-foreground hover:text-foreground"><X className="h-4 w-4" /></button>
+        </div>
+        <div className="px-6 py-4">
+          {loading ? (
+            <p className="text-center text-muted-foreground">加载中…</p>
+          ) : stats ? (
+            <div className="space-y-4">
+              <div className="grid grid-cols-3 gap-4">
+                {[
+                  { label: '目标人数', value: stats.targetCount },
+                  { label: '已发送', value: stats.sentCount },
+                  { label: '已阅读', value: stats.readCount },
+                ].map((item) => (
+                  <div key={item.label} className="bg-muted/50 rounded-lg p-3 text-center">
+                    <p className="text-2xl font-bold">{item.value.toLocaleString()}</p>
+                    <p className="text-xs text-muted-foreground mt-1">{item.label}</p>
+                  </div>
+                ))}
+              </div>
+              <div className="bg-muted/50 rounded-lg p-3 text-center">
+                <p className="text-2xl font-bold text-primary">{stats.readRate}%</p>
+                <p className="text-xs text-muted-foreground mt-1">阅读率</p>
+              </div>
+              {stats.executions.length > 0 && (
+                <div>
+                  <p className="text-xs font-medium mb-2 text-muted-foreground">最近执行记录</p>
+                  <div className="space-y-1 max-h-40 overflow-y-auto">
+                    {stats.executions.map((ex: any, i: number) => (
+                      <div key={i} className="flex items-center justify-between text-xs px-2 py-1 bg-muted/30 rounded">
+                        <span>{new Date(ex.started_at).toLocaleString('zh-CN', { dateStyle: 'short', timeStyle: 'short' })}</span>
+                        <span className={ex.status === 'COMPLETED' ? 'text-green-600' : ex.status === 'FAILED' ? 'text-red-600' : 'text-yellow-600'}>
+                          {ex.status}
+                        </span>
+                        <span>{ex.sent_count} 发送</span>
+                      </div>
+                    ))}
+                  </div>
+                </div>
+              )}
+            </div>
+          ) : (
+            <p className="text-muted-foreground text-center">暂无数据</p>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}
+
+/* ---------- Campaign Modal ---------- */
+
+function CampaignModal({
+  initial,
+  onSave,
+  onClose,
+}: {
+  initial?: Campaign;
+  onSave: (dto: any, id?: string) => Promise<void>;
+  onClose: () => void;
+}) {
+  const [name, setName] = useState(initial?.name ?? '');
+  const [description, setDescription] = useState(initial?.description ?? '');
+  const [notificationId, setNotificationId] = useState(initial?.notificationId ?? '');
+  const [scheduleType, setScheduleType] = useState<ScheduleType>(initial?.scheduleType ?? 'ONCE');
+  const [scheduledAt, setScheduledAt] = useState(
+    initial?.scheduledAt ? initial.scheduledAt.slice(0, 16) : '',
+  );
+  const [cronExpr, setCronExpr] = useState(initial?.cronExpr ?? '');
+  const [timezone, setTimezone] = useState(initial?.timezone ?? 'Asia/Shanghai');
+  const [saving, setSaving] = useState(false);
+  const [error, setError] = useState('');
+
+  const handleSubmit = async () => {
+    if (!name.trim()) { setError('活动名称不能为空'); return; }
+    setSaving(true); setError('');
+    try {
+      await onSave({
+        name: name.trim(),
+        description: description.trim() || undefined,
+        notificationId: notificationId.trim() || undefined,
+        scheduleType,
+        scheduledAt: scheduleType === 'ONCE' && scheduledAt ? new Date(scheduledAt).toISOString() : null,
+        cronExpr: scheduleType === 'RECURRING' ? cronExpr.trim() : null,
+        timezone,
+      }, initial?.id);
+      onClose();
+    } catch (e: any) {
+      setError(e.message ?? '保存失败');
+    } finally {
+      setSaving(false);
+    }
+  };
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/40 p-4">
+      <div className="bg-card w-full max-w-lg rounded-xl shadow-xl border flex flex-col max-h-[90vh]">
+        <div className="flex items-center justify-between px-6 py-4 border-b">
+          <h2 className="text-base font-semibold">{initial ? '编辑活动' : '新建推送活动'}</h2>
+          <button onClick={onClose} className="text-muted-foreground hover:text-foreground"><X className="h-4 w-4" /></button>
+        </div>
+        <div className="flex-1 overflow-y-auto px-6 py-4 space-y-4">
+          {error && <p className="text-sm text-red-500">{error}</p>}
+
+          <div>
+            <label className="block text-xs font-medium mb-1">活动名称 *</label>
+            <input className="w-full rounded-md border bg-background px-3 py-2 text-sm outline-none focus:ring-1 focus:ring-primary"
+              value={name} onChange={(e) => setName(e.target.value)} maxLength={200} />
+          </div>
+
+          <div>
+            <label className="block text-xs font-medium mb-1">描述（可选）</label>
+            <textarea className="w-full rounded-md border bg-background px-3 py-2 text-sm outline-none focus:ring-1 focus:ring-primary resize-none"
+              rows={2} value={description} onChange={(e) => setDescription(e.target.value)} />
+          </div>
+
+          <div>
+            <label className="block text-xs font-medium mb-1">关联通知模板 ID（可选）</label>
+            <input className="w-full rounded-md border bg-background px-3 py-2 text-sm font-mono outline-none focus:ring-1 focus:ring-primary"
+              value={notificationId} onChange={(e) => setNotificationId(e.target.value)}
+              placeholder="notification UUID" />
+          </div>
+
+          <div>
+            <label className="block text-xs font-medium mb-1">调度类型</label>
+            <div className="flex gap-4">
+              {(['ONCE', 'RECURRING'] as ScheduleType[]).map((t) => (
+                <label key={t} className="flex items-center gap-2 cursor-pointer text-sm">
+                  <input type="radio" value={t} checked={scheduleType === t} onChange={() => setScheduleType(t)} />
+                  {t === 'ONCE' ? '单次执行' : '循环执行（Cron）'}
+                </label>
+              ))}
+            </div>
+          </div>
+
+          {scheduleType === 'ONCE' && (
+            <div>
+              <label className="block text-xs font-medium mb-1">执行时间</label>
+              <input type="datetime-local" className="w-full rounded-md border bg-background px-3 py-2 text-sm"
+                value={scheduledAt} onChange={(e) => setScheduledAt(e.target.value)} />
+            </div>
+          )}
+
+          {scheduleType === 'RECURRING' && (
+            <div>
+              <label className="block text-xs font-medium mb-1">Cron 表达式</label>
+              <input className="w-full rounded-md border bg-background px-3 py-2 text-sm font-mono outline-none focus:ring-1 focus:ring-primary"
+                value={cronExpr} onChange={(e) => setCronExpr(e.target.value)}
+                placeholder="0 9 * * 1 (每周一 09:00)" />
+            </div>
+          )}
+
+          <div>
+            <label className="block text-xs font-medium mb-1">时区</label>
+            <input className="w-full rounded-md border bg-background px-3 py-2 text-sm outline-none focus:ring-1 focus:ring-primary"
+              value={timezone} onChange={(e) => setTimezone(e.target.value)}
+              placeholder="Asia/Shanghai" />
+          </div>
+        </div>
+        <div className="flex justify-end gap-2 px-6 py-4 border-t">
+          <button onClick={onClose} className="px-4 py-2 text-sm rounded-md border hover:bg-accent transition-colors">取消</button>
+          <button onClick={handleSubmit} disabled={saving}
+            className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 transition-colors disabled:opacity-50">
+            {saving ? '保存中…' : '保存'}
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+/* ---------- Main page ---------- */
+
+const STATUS_OPTIONS: CampaignStatus[] = ['DRAFT', 'SCHEDULED', 'RUNNING', 'COMPLETED', 'CANCELLED', 'FAILED'];
+
+export default function CampaignsPage() {
+  const [items, setItems] = useState<Campaign[]>([]);
+  const [total, setTotal] = useState(0);
+  const [loading, setLoading] = useState(false);
+  const [filterStatus, setFilterStatus] = useState('');
+  const [offset, setOffset] = useState(0);
+  const limit = 20;
+  const [modal, setModal] = useState<{ mode: 'create' } | { mode: 'edit'; item: Campaign } | null>(null);
+  const [statsId, setStatsId] = useState<string | null>(null);
+  const [deleting, setDeleting] = useState<string | null>(null);
+
+  const load = useCallback(async () => {
+    setLoading(true);
+    try {
+      const result = await listCampaigns({ status: filterStatus || undefined, limit, offset });
+      setItems(result.items);
+      setTotal(result.total);
+    } catch (e) { console.error(e); }
+    finally { setLoading(false); }
+  }, [filterStatus, offset]);
+
+  useEffect(() => { load(); }, [load]);
+
+  const handleSave = async (dto: any, id?: string) => {
+    if (id) {
+      await updateCampaign(id, dto);
+    } else {
+      const campaign = await createCampaign(dto);
+      // Auto-schedule if scheduledAt provided
+      if (dto.scheduledAt || dto.cronExpr) {
+        await scheduleCampaign(campaign.id, { scheduledAt: dto.scheduledAt, cronExpr: dto.cronExpr, timezone: dto.timezone });
+      }
+    }
+    await load();
+  };
+
+  const handleSchedule = async (item: Campaign) => {
+    if (!item.scheduledAt && !item.cronExpr) {
+      alert('请先设置执行时间或 Cron 表达式');
+      return;
+    }
+    await scheduleCampaign(item.id, {
+      scheduledAt: item.scheduledAt ?? undefined,
+      cronExpr: item.cronExpr ?? undefined,
+      timezone: item.timezone,
+    });
+    await load();
+  };
+
+  const handleCancel = async (item: Campaign) => {
+    if (!confirm(`确认取消活动「${item.name}」？`)) return;
+    await cancelCampaign(item.id);
+    await load();
+  };
+
+  const handleDelete = async (item: Campaign) => {
+    if (!confirm(`确认删除活动「${item.name}」？`)) return;
+    setDeleting(item.id);
+    try { await deleteCampaign(item.id); await load(); }
+    finally { setDeleting(null); }
+  };
+
+  const statsItem = items.find((i) => i.id === statsId);
+
+  return (
+    <div className="flex-1 flex flex-col min-h-0 p-6">
+      <div className="flex items-center justify-between mb-6">
+        <div className="flex items-center gap-2">
+          <Megaphone className="h-5 w-5 text-primary" />
+          <h1 className="text-xl font-semibold">推送活动管理</h1>
+          <span className="text-xs text-muted-foreground ml-1">（批量定时推送）</span>
+        </div>
+        <div className="flex items-center gap-2">
+          <select className="rounded-md border bg-background px-3 py-1.5 text-sm"
+            value={filterStatus} onChange={(e) => { setFilterStatus(e.target.value); setOffset(0); }}>
+            <option value="">全部状态</option>
+            {STATUS_OPTIONS.map((s) => <option key={s} value={s}>{STATUS_LABEL[s]}</option>)}
+          </select>
+          <button onClick={load} disabled={loading}
+            className="flex items-center gap-1.5 px-3 py-1.5 text-sm rounded-md border hover:bg-accent transition-colors">
+            <RefreshCw className={cn('h-3.5 w-3.5', loading && 'animate-spin')} />刷新
+          </button>
+          <button onClick={() => setModal({ mode: 'create' })}
+            className="flex items-center gap-1.5 px-3 py-1.5 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 transition-colors">
+            <Plus className="h-3.5 w-3.5" />新建活动
+          </button>
+        </div>
+      </div>
+
+      <div className="flex-1 min-h-0 overflow-auto rounded-lg border bg-card">
+        <table className="w-full text-sm">
+          <thead className="bg-muted/50 sticky top-0">
+            <tr>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground w-48">活动名称</th>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground">状态</th>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground">调度</th>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground">下次执行</th>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground">发送/阅读</th>
+              <th className="text-right px-4 py-3 font-medium text-muted-foreground">操作</th>
+            </tr>
+          </thead>
+          <tbody className="divide-y">
+            {loading && items.length === 0 && (
+              <tr><td colSpan={6} className="text-center py-12 text-muted-foreground">加载中…</td></tr>
+            )}
+            {!loading && items.length === 0 && (
+              <tr><td colSpan={6} className="text-center py-12 text-muted-foreground">暂无活动</td></tr>
+            )}
+            {items.map((item) => (
+              <tr key={item.id} className="hover:bg-muted/30 transition-colors">
+                <td className="px-4 py-3 font-medium max-w-[12rem] truncate" title={item.name}>{item.name}</td>
+                <td className="px-4 py-3">
+                  <span className={cn('px-2 py-0.5 rounded text-xs font-medium', STATUS_STYLE[item.status])}>
+                    {STATUS_LABEL[item.status]}
+                  </span>
+                </td>
+                <td className="px-4 py-3 text-xs text-muted-foreground">
+                  {item.scheduleType === 'ONCE' ? '单次' : `循环: ${item.cronExpr ?? '—'}`}
+                </td>
+                <td className="px-4 py-3 text-xs text-muted-foreground">
+                  {item.nextRunAt ? new Date(item.nextRunAt).toLocaleString('zh-CN', { dateStyle: 'short', timeStyle: 'short' }) : '—'}
+                </td>
+                <td className="px-4 py-3 text-xs text-muted-foreground">
+                  {item.sentCount} / {item.readCount}
+                </td>
+                <td className="px-4 py-3">
+                  <div className="flex items-center justify-end gap-1">
+                    {/* Stats */}
+                    <button onClick={() => setStatsId(item.id)}
+                      className="p-1.5 rounded hover:bg-accent text-muted-foreground hover:text-foreground transition-colors" title="查看数据">
+                      <BarChart2 className="h-4 w-4" />
+                    </button>
+                    {/* Schedule (DRAFT only) */}
+                    {item.status === 'DRAFT' && (
+                      <button onClick={() => handleSchedule(item)}
+                        className="p-1.5 rounded hover:bg-accent text-muted-foreground hover:text-foreground transition-colors" title="排期">
+                        <Play className="h-4 w-4 text-blue-600" />
+                      </button>
+                    )}
+                    {/* Cancel (SCHEDULED only) */}
+                    {item.status === 'SCHEDULED' && (
+                      <button onClick={() => handleCancel(item)}
+                        className="p-1.5 rounded hover:bg-accent text-muted-foreground hover:text-foreground transition-colors" title="取消">
+                        <Ban className="h-4 w-4 text-orange-500" />
+                      </button>
+                    )}
+                    {/* Edit */}
+                    {['DRAFT', 'SCHEDULED'].includes(item.status) && (
+                      <button onClick={() => setModal({ mode: 'edit', item })}
+                        className="p-1.5 rounded hover:bg-accent text-muted-foreground hover:text-foreground transition-colors">
+                        <Pencil className="h-4 w-4" />
+                      </button>
+                    )}
+                    {/* Delete */}
+                    <button onClick={() => handleDelete(item)} disabled={deleting === item.id}
+                      className="p-1.5 rounded hover:bg-red-50 text-muted-foreground hover:text-red-600 transition-colors disabled:opacity-50">
+                      <Trash2 className="h-4 w-4" />
+                    </button>
+                  </div>
+                </td>
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      </div>
+
+      {total > limit && (
+        <div className="flex items-center justify-between mt-4 text-sm text-muted-foreground">
+          <span>共 {total} 条</span>
+          <div className="flex gap-2">
+            <button disabled={offset === 0} onClick={() => setOffset(Math.max(0, offset - limit))}
+              className="px-3 py-1.5 rounded border hover:bg-accent disabled:opacity-40 transition-colors">上一页</button>
+            <button disabled={offset + limit >= total} onClick={() => setOffset(offset + limit)}
+              className="px-3 py-1.5 rounded border hover:bg-accent disabled:opacity-40 transition-colors">下一页</button>
+          </div>
+        </div>
+      )}
+
+      {modal && (
+        <CampaignModal
+          initial={modal.mode === 'edit' ? modal.item : undefined}
+          onSave={handleSave}
+          onClose={() => setModal(null)}
+        />
+      )}
+
+      {statsId && statsItem && (
+        <StatsModal campaignId={statsId} name={statsItem.name} onClose={() => setStatsId(null)} />
+      )}
+    </div>
+  );
+}
diff --git a/it0-web-admin/src/app/(admin)/notification-channels/page.tsx b/it0-web-admin/src/app/(admin)/notification-channels/page.tsx
new file mode 100644
index 0000000..91387a3
--- /dev/null
+++ b/it0-web-admin/src/app/(admin)/notification-channels/page.tsx
@@ -0,0 +1,297 @@
+'use client';
+
+import { useState, useEffect, useCallback } from 'react';
+import { Radio, Plus, RefreshCw, Pencil, Trash2, X, Shield } from 'lucide-react';
+import { cn } from '@/lib/utils';
+
+interface NotificationChannel {
+  channelKey: string;
+  name: string;
+  description: string | null;
+  isMandatory: boolean;
+  isEnabled: boolean;
+  createdAt: string;
+  updatedAt: string;
+}
+
+function getAuthHeaders(): HeadersInit {
+  const token = typeof window !== 'undefined' ? localStorage.getItem('token') : null;
+  return { Authorization: `Bearer ${token ?? ''}`, 'Content-Type': 'application/json' };
+}
+
+async function listChannels(): Promise<NotificationChannel[]> {
+  const res = await fetch('/api/proxy/api/v1/notifications/channels', { headers: getAuthHeaders() });
+  if (!res.ok) throw new Error(`${res.status}`);
+  return res.json();
+}
+
+async function createChannel(dto: { channelKey: string; name: string; description?: string; isMandatory?: boolean }) {
+  const res = await fetch('/api/proxy/api/v1/notifications/channels', {
+    method: 'POST', headers: getAuthHeaders(), body: JSON.stringify(dto),
+  });
+  if (!res.ok) throw new Error(`${res.status}`);
+  return res.json();
+}
+
+async function updateChannel(key: string, dto: { name?: string; description?: string; isMandatory?: boolean; isEnabled?: boolean }) {
+  const res = await fetch(`/api/proxy/api/v1/notifications/channels/${key}`, {
+    method: 'PUT', headers: getAuthHeaders(), body: JSON.stringify(dto),
+  });
+  if (!res.ok) throw new Error(`${res.status}`);
+  return res.json();
+}
+
+async function deleteChannel(key: string) {
+  const res = await fetch(`/api/proxy/api/v1/notifications/channels/${key}`, {
+    method: 'DELETE', headers: getAuthHeaders(),
+  });
+  if (!res.ok) throw new Error(`${res.status}`);
+}
+
+/* ---------- Modal ---------- */
+
+function ChannelModal({
+  initial,
+  onSave,
+  onClose,
+}: {
+  initial?: NotificationChannel;
+  onSave: (data: any, key?: string) => Promise<void>;
+  onClose: () => void;
+}) {
+  const [channelKey, setChannelKey] = useState(initial?.channelKey ?? '');
+  const [name, setName] = useState(initial?.name ?? '');
+  const [description, setDescription] = useState(initial?.description ?? '');
+  const [isMandatory, setIsMandatory] = useState(initial?.isMandatory ?? false);
+  const [saving, setSaving] = useState(false);
+  const [error, setError] = useState('');
+
+  const handleSubmit = async () => {
+    if (!name.trim()) { setError('名称不能为空'); return; }
+    if (!initial && !channelKey.match(/^[a-z0-9_]+$/)) {
+      setError('频道 key 只能包含小写字母、数字和下划线');
+      return;
+    }
+    setSaving(true); setError('');
+    try {
+      await onSave(
+        { channelKey, name: name.trim(), description: description.trim() || undefined, isMandatory },
+        initial?.channelKey,
+      );
+      onClose();
+    } catch (e: any) {
+      setError(e.message ?? '保存失败');
+    } finally {
+      setSaving(false);
+    }
+  };
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/40 p-4">
+      <div className="bg-card w-full max-w-md rounded-xl shadow-xl border flex flex-col">
+        <div className="flex items-center justify-between px-6 py-4 border-b">
+          <h2 className="text-base font-semibold">{initial ? '编辑频道' : '新建频道'}</h2>
+          <button onClick={onClose} className="text-muted-foreground hover:text-foreground"><X className="h-4 w-4" /></button>
+        </div>
+        <div className="px-6 py-4 space-y-4">
+          {error && <p className="text-sm text-red-500">{error}</p>}
+          {!initial && (
+            <div>
+              <label className="block text-xs font-medium mb-1">频道 Key *</label>
+              <input
+                className="w-full rounded-md border bg-background px-3 py-2 text-sm font-mono outline-none focus:ring-1 focus:ring-primary"
+                value={channelKey}
+                onChange={(e) => setChannelKey(e.target.value.toLowerCase())}
+                placeholder="如: marketing, billing"
+                maxLength={50}
+              />
+              <p className="text-xs text-muted-foreground mt-1">只能包含小写字母、数字和下划线，创建后不可更改</p>
+            </div>
+          )}
+          <div>
+            <label className="block text-xs font-medium mb-1">显示名称 *</label>
+            <input
+              className="w-full rounded-md border bg-background px-3 py-2 text-sm outline-none focus:ring-1 focus:ring-primary"
+              value={name}
+              onChange={(e) => setName(e.target.value)}
+              placeholder="如: 营销推广"
+              maxLength={100}
+            />
+          </div>
+          <div>
+            <label className="block text-xs font-medium mb-1">描述（可选）</label>
+            <textarea
+              className="w-full rounded-md border bg-background px-3 py-2 text-sm outline-none focus:ring-1 focus:ring-primary resize-none"
+              rows={2}
+              value={description}
+              onChange={(e) => setDescription(e.target.value)}
+              placeholder="该频道的用途说明"
+            />
+          </div>
+          <label className="flex items-center gap-2 cursor-pointer">
+            <input
+              type="checkbox"
+              checked={isMandatory}
+              onChange={(e) => setIsMandatory(e.target.checked)}
+              className="rounded"
+            />
+            <span className="text-sm font-medium">强制频道（用户无法关闭）</span>
+          </label>
+          <p className="text-xs text-muted-foreground -mt-2">适用于安全告警、重要系统通知等必要信息。</p>
+        </div>
+        <div className="flex justify-end gap-2 px-6 py-4 border-t">
+          <button onClick={onClose} className="px-4 py-2 text-sm rounded-md border hover:bg-accent transition-colors">取消</button>
+          <button
+            onClick={handleSubmit}
+            disabled={saving}
+            className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 transition-colors disabled:opacity-50"
+          >
+            {saving ? '保存中…' : '保存'}
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+/* ---------- Main page ---------- */
+
+export default function NotificationChannelsPage() {
+  const [channels, setChannels] = useState<NotificationChannel[]>([]);
+  const [loading, setLoading] = useState(false);
+  const [modal, setModal] = useState<{ mode: 'create' } | { mode: 'edit'; ch: NotificationChannel } | null>(null);
+  const [deleting, setDeleting] = useState<string | null>(null);
+
+  const load = useCallback(async () => {
+    setLoading(true);
+    try { setChannels(await listChannels()); }
+    catch (e) { console.error(e); }
+    finally { setLoading(false); }
+  }, []);
+
+  useEffect(() => { load(); }, [load]);
+
+  const handleSave = async (data: any, key?: string) => {
+    if (key) {
+      await updateChannel(key, data);
+    } else {
+      await createChannel(data);
+    }
+    await load();
+  };
+
+  const handleDelete = async (ch: NotificationChannel) => {
+    if (ch.isMandatory) { alert('强制频道不可删除'); return; }
+    if (!confirm(`确认删除频道「${ch.name}」？`)) return;
+    setDeleting(ch.channelKey);
+    try { await deleteChannel(ch.channelKey); await load(); }
+    finally { setDeleting(null); }
+  };
+
+  const handleToggleEnabled = async (ch: NotificationChannel) => {
+    await updateChannel(ch.channelKey, { isEnabled: !ch.isEnabled });
+    await load();
+  };
+
+  return (
+    <div className="flex-1 flex flex-col min-h-0 p-6">
+      <div className="flex items-center justify-between mb-6">
+        <div className="flex items-center gap-2">
+          <Radio className="h-5 w-5 text-primary" />
+          <h1 className="text-xl font-semibold">通知频道管理</h1>
+          <span className="text-xs text-muted-foreground ml-1">（用户可按频道订阅/取消通知）</span>
+        </div>
+        <div className="flex items-center gap-2">
+          <button
+            onClick={load} disabled={loading}
+            className="flex items-center gap-1.5 px-3 py-1.5 text-sm rounded-md border hover:bg-accent transition-colors"
+          >
+            <RefreshCw className={cn('h-3.5 w-3.5', loading && 'animate-spin')} />刷新
+          </button>
+          <button
+            onClick={() => setModal({ mode: 'create' })}
+            className="flex items-center gap-1.5 px-3 py-1.5 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 transition-colors"
+          >
+            <Plus className="h-3.5 w-3.5" />新建频道
+          </button>
+        </div>
+      </div>
+
+      <div className="flex-1 min-h-0 overflow-auto rounded-lg border bg-card">
+        <table className="w-full text-sm">
+          <thead className="bg-muted/50 sticky top-0">
+            <tr>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground">Key</th>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground">名称</th>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground">描述</th>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground">类型</th>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground">状态</th>
+              <th className="text-right px-4 py-3 font-medium text-muted-foreground">操作</th>
+            </tr>
+          </thead>
+          <tbody className="divide-y">
+            {loading && channels.length === 0 && (
+              <tr><td colSpan={6} className="text-center py-12 text-muted-foreground">加载中…</td></tr>
+            )}
+            {!loading && channels.length === 0 && (
+              <tr><td colSpan={6} className="text-center py-12 text-muted-foreground">暂无频道</td></tr>
+            )}
+            {channels.map((ch) => (
+              <tr key={ch.channelKey} className="hover:bg-muted/30 transition-colors">
+                <td className="px-4 py-3 font-mono text-xs text-muted-foreground">{ch.channelKey}</td>
+                <td className="px-4 py-3 font-medium">{ch.name}</td>
+                <td className="px-4 py-3 text-xs text-muted-foreground max-w-xs truncate">{ch.description ?? '—'}</td>
+                <td className="px-4 py-3">
+                  {ch.isMandatory ? (
+                    <span className="flex items-center gap-1 text-xs text-amber-700 bg-amber-50 px-2 py-0.5 rounded font-medium w-fit">
+                      <Shield className="h-3 w-3" />强制
+                    </span>
+                  ) : (
+                    <span className="text-xs text-muted-foreground bg-muted px-2 py-0.5 rounded">可选</span>
+                  )}
+                </td>
+                <td className="px-4 py-3">
+                  <button
+                    onClick={() => handleToggleEnabled(ch)}
+                    className={cn(
+                      'px-2 py-0.5 rounded text-xs font-medium cursor-pointer transition-colors',
+                      ch.isEnabled ? 'bg-green-100 text-green-700 hover:bg-green-200' : 'bg-gray-100 text-gray-500 hover:bg-gray-200',
+                    )}
+                  >
+                    {ch.isEnabled ? '已启用' : '已禁用'}
+                  </button>
+                </td>
+                <td className="px-4 py-3">
+                  <div className="flex items-center justify-end gap-1">
+                    <button
+                      onClick={() => setModal({ mode: 'edit', ch })}
+                      className="p-1.5 rounded hover:bg-accent text-muted-foreground hover:text-foreground transition-colors"
+                    >
+                      <Pencil className="h-4 w-4" />
+                    </button>
+                    <button
+                      onClick={() => handleDelete(ch)}
+                      disabled={!!deleting || ch.isMandatory}
+                      className="p-1.5 rounded hover:bg-red-50 text-muted-foreground hover:text-red-600 transition-colors disabled:opacity-30"
+                      title={ch.isMandatory ? '强制频道不可删除' : '删除'}
+                    >
+                      <Trash2 className="h-4 w-4" />
+                    </button>
+                  </div>
+                </td>
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      </div>
+
+      {modal && (
+        <ChannelModal
+          initial={modal.mode === 'edit' ? modal.ch : undefined}
+          onSave={handleSave}
+          onClose={() => setModal(null)}
+        />
+      )}
+    </div>
+  );
+}
diff --git a/it0-web-admin/src/app/(admin)/notifications/page.tsx b/it0-web-admin/src/app/(admin)/notifications/page.tsx
new file mode 100644
index 0000000..b2b483b
--- /dev/null
+++ b/it0-web-admin/src/app/(admin)/notifications/page.tsx
@@ -0,0 +1,705 @@
+'use client';
+
+import { useState, useEffect, useCallback } from 'react';
+import {
+  Bell,
+  Plus,
+  RefreshCw,
+  Pencil,
+  Trash2,
+  ToggleLeft,
+  ToggleRight,
+  X,
+} from 'lucide-react';
+import { cn } from '@/lib/utils';
+import {
+  NotificationItem,
+  NotificationType,
+  NotificationPriority,
+  TargetType,
+  TagLogic,
+  CreateNotificationPayload,
+  NOTIFICATION_TYPE_OPTIONS,
+  NOTIFICATION_PRIORITY_OPTIONS,
+  TARGET_TYPE_OPTIONS,
+  PLAN_OPTIONS,
+  STATUS_OPTIONS,
+} from '@/domain/entities/notification';
+import {
+  listAdminNotifications,
+  createNotification,
+  updateNotification,
+  deleteNotification,
+  toggleNotification,
+} from '@/infrastructure/repositories/api-notification.repository';
+import { listTenantTags } from '@/infrastructure/repositories/api-tenant-tag.repository';
+import { TenantTag } from '@/domain/entities/tenant-tag';
+
+/* ---------- helpers ---------- */
+
+function typeBadge(type: NotificationType) {
+  const opt = NOTIFICATION_TYPE_OPTIONS.find((o) => o.value === type);
+  return (
+    <span className={cn('inline-flex items-center px-2 py-0.5 rounded text-xs font-medium', opt?.color ?? 'bg-gray-100 text-gray-700')}>
+      {opt?.label ?? type}
+    </span>
+  );
+}
+
+function targetLabel(item: NotificationItem) {
+  switch (item.targetType) {
+    case 'ALL': return '全部租户';
+    case 'SPECIFIC_TENANTS': return `指定租户 (${item.tenantIds?.length ?? 0})`;
+    case 'SPECIFIC_USERS': return `指定用户 (${item.userIds?.length ?? 0})`;
+    case 'BY_TENANT_TAG': return `按标签 (${item.targetTagIds?.length ?? 0})`;
+    case 'BY_PLAN': return `套餐: ${item.targetPlans?.join(', ') ?? '—'}`;
+    case 'BY_TENANT_STATUS': return `状态: ${item.targetStatuses?.join(', ') ?? '—'}`;
+    case 'BY_SEGMENT': return `人群包: ${item.targetSegment ?? '—'}`;
+    default: return item.targetType;
+  }
+}
+
+function priorityLabel(p: NotificationPriority) {
+  const map: Record<NotificationPriority, string> = {
+    LOW: '低', NORMAL: '普通', HIGH: '高', URGENT: '紧急',
+  };
+  return map[p] ?? p;
+}
+
+function formatDate(s: string | null) {
+  if (!s) return '—';
+  return new Date(s).toLocaleString('zh-CN', { dateStyle: 'short', timeStyle: 'short' });
+}
+
+/* ---------- form defaults ---------- */
+
+const EMPTY_FORM: CreateNotificationPayload = {
+  title: '',
+  content: '',
+  type: 'ANNOUNCEMENT',
+  priority: 'NORMAL',
+  targetType: 'ALL',
+  tenantIds: [],
+  userIds: [],
+  targetTagIds: [],
+  targetTagLogic: 'ANY',
+  targetPlans: [],
+  targetStatuses: [],
+  targetSegment: null,
+  channelKey: null,
+  imageUrl: null,
+  linkUrl: null,
+  requiresForceRead: false,
+  isEnabled: true,
+  publishedAt: null,
+  expiresAt: null,
+};
+
+/* ---------- Modal ---------- */
+
+function NotificationModal({
+  initial,
+  allTags,
+  onSave,
+  onClose,
+}: {
+  initial: Partial<CreateNotificationPayload> & { id?: string };
+  allTags: TenantTag[];
+  onSave: (payload: CreateNotificationPayload, id?: string) => Promise<void>;
+  onClose: () => void;
+}) {
+  const [form, setForm] = useState<CreateNotificationPayload>({
+    ...EMPTY_FORM,
+    ...initial,
+  });
+  const [tenantIdsRaw, setTenantIdsRaw] = useState((initial.tenantIds ?? []).join('\n'));
+  const [userIdsRaw, setUserIdsRaw] = useState((initial.userIds ?? []).join('\n'));
+  const [saving, setSaving] = useState(false);
+  const [error, setError] = useState('');
+
+  const set = <K extends keyof CreateNotificationPayload>(k: K, v: CreateNotificationPayload[K]) =>
+    setForm((f) => ({ ...f, [k]: v }));
+
+  const togglePlan = (plan: string) => {
+    const cur = form.targetPlans ?? [];
+    set('targetPlans', cur.includes(plan) ? cur.filter((p) => p !== plan) : [...cur, plan]);
+  };
+
+  const toggleStatus = (status: string) => {
+    const cur = form.targetStatuses ?? [];
+    set('targetStatuses', cur.includes(status) ? cur.filter((s) => s !== status) : [...cur, status]);
+  };
+
+  const toggleTag = (tagId: string) => {
+    const cur = form.targetTagIds ?? [];
+    set('targetTagIds', cur.includes(tagId) ? cur.filter((t) => t !== tagId) : [...cur, tagId]);
+  };
+
+  const handleSubmit = async () => {
+    if (!form.title.trim()) { setError('标题不能为空'); return; }
+    if (!form.content.trim()) { setError('内容不能为空'); return; }
+    setSaving(true);
+    setError('');
+    try {
+      const tenantIds = tenantIdsRaw.split(/[\n,]+/).map((s) => s.trim()).filter(Boolean);
+      const userIds = userIdsRaw.split(/[\n,]+/).map((s) => s.trim()).filter(Boolean);
+      await onSave({ ...form, tenantIds, userIds }, initial.id);
+      onClose();
+    } catch (e: any) {
+      setError(e.message ?? '保存失败');
+    } finally {
+      setSaving(false);
+    }
+  };
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/40 p-4">
+      <div className="bg-card w-full max-w-2xl rounded-xl shadow-xl border flex flex-col max-h-[90vh]">
+        {/* header */}
+        <div className="flex items-center justify-between px-6 py-4 border-b">
+          <h2 className="text-base font-semibold">{initial.id ? '编辑通知' : '新建通知'}</h2>
+          <button onClick={onClose} className="text-muted-foreground hover:text-foreground">
+            <X className="h-4 w-4" />
+          </button>
+        </div>
+
+        {/* body */}
+        <div className="flex-1 overflow-y-auto px-6 py-4 space-y-4">
+          {error && <p className="text-sm text-red-500">{error}</p>}
+
+          {/* title */}
+          <div>
+            <label className="block text-xs font-medium mb-1">标题 *</label>
+            <input
+              className="w-full rounded-md border bg-background px-3 py-2 text-sm outline-none focus:ring-1 focus:ring-primary"
+              value={form.title}
+              onChange={(e) => set('title', e.target.value)}
+              maxLength={200}
+              placeholder="通知标题"
+            />
+          </div>
+
+          {/* content */}
+          <div>
+            <label className="block text-xs font-medium mb-1">内容 *</label>
+            <textarea
+              className="w-full rounded-md border bg-background px-3 py-2 text-sm outline-none focus:ring-1 focus:ring-primary resize-none"
+              rows={5}
+              value={form.content}
+              onChange={(e) => set('content', e.target.value)}
+              placeholder="通知正文内容"
+            />
+          </div>
+
+          {/* type + priority */}
+          <div className="grid grid-cols-2 gap-3">
+            <div>
+              <label className="block text-xs font-medium mb-1">类型</label>
+              <select
+                className="w-full rounded-md border bg-background px-3 py-2 text-sm"
+                value={form.type}
+                onChange={(e) => set('type', e.target.value as NotificationType)}
+              >
+                {NOTIFICATION_TYPE_OPTIONS.map((o) => (
+                  <option key={o.value} value={o.value}>{o.label}</option>
+                ))}
+              </select>
+            </div>
+            <div>
+              <label className="block text-xs font-medium mb-1">优先级</label>
+              <select
+                className="w-full rounded-md border bg-background px-3 py-2 text-sm"
+                value={form.priority}
+                onChange={(e) => set('priority', e.target.value as NotificationPriority)}
+              >
+                {NOTIFICATION_PRIORITY_OPTIONS.map((o) => (
+                  <option key={o.value} value={o.value}>{o.label}</option>
+                ))}
+              </select>
+            </div>
+          </div>
+
+          {/* target type */}
+          <div>
+            <label className="block text-xs font-medium mb-1">推送对象</label>
+            <select
+              className="w-full rounded-md border bg-background px-3 py-2 text-sm"
+              value={form.targetType}
+              onChange={(e) => set('targetType', e.target.value as TargetType)}
+            >
+              {TARGET_TYPE_OPTIONS.map((o) => (
+                <option key={o.value} value={o.value}>{o.label} — {o.desc}</option>
+              ))}
+            </select>
+          </div>
+
+          {/* SPECIFIC_TENANTS */}
+          {form.targetType === 'SPECIFIC_TENANTS' && (
+            <div>
+              <label className="block text-xs font-medium mb-1">指定租户 ID（每行一个）</label>
+              <textarea
+                className="w-full rounded-md border bg-background px-3 py-2 text-sm font-mono outline-none focus:ring-1 focus:ring-primary resize-none"
+                rows={4}
+                value={tenantIdsRaw}
+                onChange={(e) => setTenantIdsRaw(e.target.value)}
+                placeholder="tenant-uuid-1&#10;tenant-uuid-2"
+              />
+            </div>
+          )}
+
+          {/* SPECIFIC_USERS */}
+          {form.targetType === 'SPECIFIC_USERS' && (
+            <div>
+              <label className="block text-xs font-medium mb-1">指定用户 ID（每行一个）</label>
+              <textarea
+                className="w-full rounded-md border bg-background px-3 py-2 text-sm font-mono outline-none focus:ring-1 focus:ring-primary resize-none"
+                rows={4}
+                value={userIdsRaw}
+                onChange={(e) => setUserIdsRaw(e.target.value)}
+                placeholder="user-uuid-1&#10;user-uuid-2"
+              />
+            </div>
+          )}
+
+          {/* BY_TENANT_TAG */}
+          {form.targetType === 'BY_TENANT_TAG' && (
+            <div className="space-y-2">
+              <div>
+                <label className="block text-xs font-medium mb-1">标签逻辑</label>
+                <div className="flex gap-4">
+                  {(['ANY', 'ALL'] as TagLogic[]).map((logic) => (
+                    <label key={logic} className="flex items-center gap-2 cursor-pointer text-sm">
+                      <input
+                        type="radio"
+                        value={logic}
+                        checked={form.targetTagLogic === logic}
+                        onChange={() => set('targetTagLogic', logic)}
+                      />
+                      {logic === 'ANY' ? '任一标签（OR）' : '全部标签（AND）'}
+                    </label>
+                  ))}
+                </div>
+              </div>
+              <div>
+                <label className="block text-xs font-medium mb-1">选择标签</label>
+                {allTags.length === 0 ? (
+                  <p className="text-xs text-muted-foreground">暂无标签，请先在「租户标签」页面创建。</p>
+                ) : (
+                  <div className="flex flex-wrap gap-2">
+                    {allTags.map((tag) => {
+                      const selected = (form.targetTagIds ?? []).includes(tag.id);
+                      return (
+                        <button
+                          key={tag.id}
+                          type="button"
+                          onClick={() => toggleTag(tag.id)}
+                          className={cn(
+                            'px-3 py-1 rounded-full text-xs font-medium border transition-colors',
+                            selected ? 'border-primary bg-primary text-primary-foreground' : 'border-border hover:border-primary',
+                          )}
+                          style={!selected ? { borderColor: tag.color, color: tag.color } : {}}
+                        >
+                          {tag.name}
+                        </button>
+                      );
+                    })}
+                  </div>
+                )}
+              </div>
+            </div>
+          )}
+
+          {/* BY_PLAN */}
+          {form.targetType === 'BY_PLAN' && (
+            <div>
+              <label className="block text-xs font-medium mb-1">选择套餐</label>
+              <div className="flex flex-wrap gap-2">
+                {PLAN_OPTIONS.map((plan) => {
+                  const selected = (form.targetPlans ?? []).includes(plan);
+                  return (
+                    <button
+                      key={plan}
+                      type="button"
+                      onClick={() => togglePlan(plan)}
+                      className={cn(
+                        'px-3 py-1 rounded-full text-xs font-medium border transition-colors',
+                        selected ? 'border-primary bg-primary text-primary-foreground' : 'border-border hover:border-primary',
+                      )}
+                    >
+                      {plan}
+                    </button>
+                  );
+                })}
+              </div>
+            </div>
+          )}
+
+          {/* BY_TENANT_STATUS */}
+          {form.targetType === 'BY_TENANT_STATUS' && (
+            <div>
+              <label className="block text-xs font-medium mb-1">选择租户状态</label>
+              <div className="flex flex-wrap gap-2">
+                {STATUS_OPTIONS.map((status) => {
+                  const selected = (form.targetStatuses ?? []).includes(status);
+                  return (
+                    <button
+                      key={status}
+                      type="button"
+                      onClick={() => toggleStatus(status)}
+                      className={cn(
+                        'px-3 py-1 rounded-full text-xs font-medium border transition-colors',
+                        selected ? 'border-primary bg-primary text-primary-foreground' : 'border-border hover:border-primary',
+                      )}
+                    >
+                      {status}
+                    </button>
+                  );
+                })}
+              </div>
+            </div>
+          )}
+
+          {/* BY_SEGMENT */}
+          {form.targetType === 'BY_SEGMENT' && (
+            <div>
+              <label className="block text-xs font-medium mb-1">人群包 Key</label>
+              <input
+                className="w-full rounded-md border bg-background px-3 py-2 text-sm outline-none focus:ring-1 focus:ring-primary"
+                value={form.targetSegment ?? ''}
+                onChange={(e) => set('targetSegment', e.target.value || null)}
+                placeholder="例如: trial_ending_soon"
+              />
+            </div>
+          )}
+
+          {/* image / link */}
+          <div className="grid grid-cols-2 gap-3">
+            <div>
+              <label className="block text-xs font-medium mb-1">图片链接（可选）</label>
+              <input
+                className="w-full rounded-md border bg-background px-3 py-2 text-sm"
+                value={form.imageUrl ?? ''}
+                onChange={(e) => set('imageUrl', e.target.value || null)}
+                placeholder="https://..."
+              />
+            </div>
+            <div>
+              <label className="block text-xs font-medium mb-1">跳转链接（可选）</label>
+              <input
+                className="w-full rounded-md border bg-background px-3 py-2 text-sm"
+                value={form.linkUrl ?? ''}
+                onChange={(e) => set('linkUrl', e.target.value || null)}
+                placeholder="https://..."
+              />
+            </div>
+          </div>
+
+          {/* published / expires */}
+          <div className="grid grid-cols-2 gap-3">
+            <div>
+              <label className="block text-xs font-medium mb-1">发布时间（空=立即）</label>
+              <input
+                type="datetime-local"
+                className="w-full rounded-md border bg-background px-3 py-2 text-sm"
+                value={form.publishedAt ? form.publishedAt.slice(0, 16) : ''}
+                onChange={(e) => set('publishedAt', e.target.value ? new Date(e.target.value).toISOString() : null)}
+              />
+            </div>
+            <div>
+              <label className="block text-xs font-medium mb-1">过期时间（空=永不）</label>
+              <input
+                type="datetime-local"
+                className="w-full rounded-md border bg-background px-3 py-2 text-sm"
+                value={form.expiresAt ? form.expiresAt.slice(0, 16) : ''}
+                onChange={(e) => set('expiresAt', e.target.value ? new Date(e.target.value).toISOString() : null)}
+              />
+            </div>
+          </div>
+
+          {/* toggles */}
+          <div className="flex items-center gap-6">
+            <label className="flex items-center gap-2 cursor-pointer">
+              <input
+                type="checkbox"
+                checked={form.requiresForceRead}
+                onChange={(e) => set('requiresForceRead', e.target.checked)}
+                className="rounded"
+              />
+              <span className="text-sm">强制阅读（用户打开 App 必须确认）</span>
+            </label>
+            <label className="flex items-center gap-2 cursor-pointer">
+              <input
+                type="checkbox"
+                checked={form.isEnabled}
+                onChange={(e) => set('isEnabled', e.target.checked)}
+                className="rounded"
+              />
+              <span className="text-sm">立即启用</span>
+            </label>
+          </div>
+        </div>
+
+        {/* footer */}
+        <div className="flex justify-end gap-2 px-6 py-4 border-t">
+          <button
+            onClick={onClose}
+            className="px-4 py-2 text-sm rounded-md border hover:bg-accent transition-colors"
+          >
+            取消
+          </button>
+          <button
+            onClick={handleSubmit}
+            disabled={saving}
+            className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 transition-colors disabled:opacity-50"
+          >
+            {saving ? '保存中…' : '保存'}
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+/* ---------- Main page ---------- */
+
+export default function NotificationsPage() {
+  const [items, setItems] = useState<NotificationItem[]>([]);
+  const [total, setTotal] = useState(0);
+  const [loading, setLoading] = useState(false);
+  const [filterType, setFilterType] = useState('');
+  const [filterTarget, setFilterTarget] = useState('');
+  const [offset, setOffset] = useState(0);
+  const limit = 20;
+  const [allTags, setAllTags] = useState<TenantTag[]>([]);
+
+  const [modal, setModal] = useState<
+    { mode: 'create' } | { mode: 'edit'; item: NotificationItem } | null
+  >(null);
+  const [deleting, setDeleting] = useState<string | null>(null);
+
+  useEffect(() => {
+    listTenantTags().then(setAllTags).catch(console.error);
+  }, []);
+
+  const load = useCallback(async () => {
+    setLoading(true);
+    try {
+      const result = await listAdminNotifications({
+        type: filterType || undefined,
+        targetType: filterTarget || undefined,
+        limit,
+        offset,
+      });
+      setItems(result.items);
+      setTotal(result.total);
+    } catch (e) {
+      console.error(e);
+    } finally {
+      setLoading(false);
+    }
+  }, [filterType, filterTarget, offset]);
+
+  useEffect(() => { load(); }, [load]);
+
+  const handleSave = async (payload: CreateNotificationPayload, id?: string) => {
+    if (id) {
+      await updateNotification(id, payload);
+    } else {
+      await createNotification(payload);
+    }
+    await load();
+  };
+
+  const handleToggle = async (item: NotificationItem) => {
+    await toggleNotification(item.id, !item.isEnabled);
+    await load();
+  };
+
+  const handleDelete = async (id: string) => {
+    if (!confirm('确认删除该通知？')) return;
+    setDeleting(id);
+    try {
+      await deleteNotification(id);
+      await load();
+    } finally {
+      setDeleting(null);
+    }
+  };
+
+  return (
+    <div className="flex-1 flex flex-col min-h-0 p-6">
+      {/* header */}
+      <div className="flex items-center justify-between mb-6">
+        <div className="flex items-center gap-2">
+          <Bell className="h-5 w-5 text-primary" />
+          <h1 className="text-xl font-semibold">站内消息管理</h1>
+          <span className="text-xs text-muted-foreground ml-1">（仅平台管理员可见）</span>
+        </div>
+        <div className="flex items-center gap-2">
+          <select
+            className="rounded-md border bg-background px-3 py-1.5 text-sm"
+            value={filterType}
+            onChange={(e) => { setFilterType(e.target.value); setOffset(0); }}
+          >
+            <option value="">全部类型</option>
+            {NOTIFICATION_TYPE_OPTIONS.map((o) => (
+              <option key={o.value} value={o.value}>{o.label}</option>
+            ))}
+          </select>
+          <select
+            className="rounded-md border bg-background px-3 py-1.5 text-sm"
+            value={filterTarget}
+            onChange={(e) => { setFilterTarget(e.target.value); setOffset(0); }}
+          >
+            <option value="">全部对象</option>
+            {TARGET_TYPE_OPTIONS.map((o) => (
+              <option key={o.value} value={o.value}>{o.label}</option>
+            ))}
+          </select>
+          <button
+            onClick={load}
+            disabled={loading}
+            className="flex items-center gap-1.5 px-3 py-1.5 text-sm rounded-md border hover:bg-accent transition-colors"
+          >
+            <RefreshCw className={cn('h-3.5 w-3.5', loading && 'animate-spin')} />
+            刷新
+          </button>
+          <button
+            onClick={() => setModal({ mode: 'create' })}
+            className="flex items-center gap-1.5 px-3 py-1.5 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 transition-colors"
+          >
+            <Plus className="h-3.5 w-3.5" />
+            新建通知
+          </button>
+        </div>
+      </div>
+
+      {/* table */}
+      <div className="flex-1 min-h-0 overflow-auto rounded-lg border bg-card">
+        <table className="w-full text-sm">
+          <thead className="bg-muted/50 sticky top-0">
+            <tr>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground w-48">标题</th>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground">类型</th>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground">优先级</th>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground">推送对象</th>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground">标记</th>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground">发布时间</th>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground">过期时间</th>
+              <th className="text-left px-4 py-3 font-medium text-muted-foreground">状态</th>
+              <th className="text-right px-4 py-3 font-medium text-muted-foreground">操作</th>
+            </tr>
+          </thead>
+          <tbody className="divide-y">
+            {loading && items.length === 0 && (
+              <tr>
+                <td colSpan={9} className="text-center py-12 text-muted-foreground">加载中…</td>
+              </tr>
+            )}
+            {!loading && items.length === 0 && (
+              <tr>
+                <td colSpan={9} className="text-center py-12 text-muted-foreground">暂无通知</td>
+              </tr>
+            )}
+            {items.map((item) => (
+              <tr key={item.id} className="hover:bg-muted/30 transition-colors">
+                <td className="px-4 py-3 max-w-[12rem] truncate font-medium" title={item.title}>
+                  {item.title}
+                </td>
+                <td className="px-4 py-3">{typeBadge(item.type)}</td>
+                <td className="px-4 py-3 text-muted-foreground text-xs">{priorityLabel(item.priority)}</td>
+                <td className="px-4 py-3 text-muted-foreground text-xs">{targetLabel(item)}</td>
+                <td className="px-4 py-3">
+                  <div className="flex flex-wrap gap-1">
+                    {item.requiresForceRead && (
+                      <span className="px-1.5 py-0.5 rounded text-[11px] bg-red-100 text-red-700 font-medium">
+                        强制阅读
+                      </span>
+                    )}
+                  </div>
+                </td>
+                <td className="px-4 py-3 text-xs text-muted-foreground">{formatDate(item.publishedAt)}</td>
+                <td className="px-4 py-3 text-xs text-muted-foreground">{formatDate(item.expiresAt)}</td>
+                <td className="px-4 py-3">
+                  <span
+                    className={cn(
+                      'px-2 py-0.5 rounded text-xs font-medium',
+                      item.isEnabled
+                        ? 'bg-green-100 text-green-700'
+                        : 'bg-gray-100 text-gray-500',
+                    )}
+                  >
+                    {item.isEnabled ? '已启用' : '已禁用'}
+                  </span>
+                </td>
+                <td className="px-4 py-3">
+                  <div className="flex items-center justify-end gap-1">
+                    <button
+                      onClick={() => handleToggle(item)}
+                      title={item.isEnabled ? '禁用' : '启用'}
+                      className="p-1.5 rounded hover:bg-accent text-muted-foreground hover:text-foreground transition-colors"
+                    >
+                      {item.isEnabled
+                        ? <ToggleRight className="h-4 w-4 text-green-600" />
+                        : <ToggleLeft className="h-4 w-4" />}
+                    </button>
+                    <button
+                      onClick={() => setModal({ mode: 'edit', item })}
+                      className="p-1.5 rounded hover:bg-accent text-muted-foreground hover:text-foreground transition-colors"
+                    >
+                      <Pencil className="h-4 w-4" />
+                    </button>
+                    <button
+                      onClick={() => handleDelete(item.id)}
+                      disabled={deleting === item.id}
+                      className="p-1.5 rounded hover:bg-red-50 text-muted-foreground hover:text-red-600 transition-colors disabled:opacity-50"
+                    >
+                      <Trash2 className="h-4 w-4" />
+                    </button>
+                  </div>
+                </td>
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      </div>
+
+      {/* pagination */}
+      {total > limit && (
+        <div className="flex items-center justify-between mt-4 text-sm text-muted-foreground">
+          <span>共 {total} 条</span>
+          <div className="flex gap-2">
+            <button
+              disabled={offset === 0}
+              onClick={() => setOffset(Math.max(0, offset - limit))}
+              className="px-3 py-1.5 rounded border hover:bg-accent disabled:opacity-40 transition-colors"
+            >
+              上一页
+            </button>
+            <button
+              disabled={offset + limit >= total}
+              onClick={() => setOffset(offset + limit)}
+              className="px-3 py-1.5 rounded border hover:bg-accent disabled:opacity-40 transition-colors"
+            >
+              下一页
+            </button>
+          </div>
+        </div>
+      )}
+
+      {/* modal */}
+      {modal && (
+        <NotificationModal
+          initial={
+            modal.mode === 'edit'
+              ? { ...modal.item, id: modal.item.id }
+              : {}
+          }
+          allTags={allTags}
+          onSave={handleSave}
+          onClose={() => setModal(null)}
+        />
+      )}
+    </div>
+  );
+}
diff --git a/it0-web-admin/src/app/(admin)/segments/page.tsx b/it0-web-admin/src/app/(admin)/segments/page.tsx
new file mode 100644
index 0000000..e06ad91
--- /dev/null
+++ b/it0-web-admin/src/app/(admin)/segments/page.tsx
@@ -0,0 +1,320 @@
+'use client';
+
+import { useState, useEffect, useCallback } from 'react';
+import { Users2, RefreshCw, Trash2, X, ChevronRight, Upload } from 'lucide-react';
+import { cn } from '@/lib/utils';
+
+interface SegmentInfo {
+  segmentKey: string;
+  memberCount: number;
+  syncedAt: string | null;
+}
+
+interface SegmentMember {
+  tenantId: string;
+  syncedAt: string;
+}
+
+function getAuthHeaders(): HeadersInit {
+  const token = typeof window !== 'undefined' ? localStorage.getItem('token') : null;
+  return { Authorization: `Bearer ${token ?? ''}`, 'Content-Type': 'application/json' };
+}
+
+const BASE = '/api/proxy/api/v1/notifications/segments';
+
+async function listSegments(): Promise<SegmentInfo[]> {
+  const res = await fetch(BASE, { headers: getAuthHeaders() });
+  if (!res.ok) throw new Error(`${res.status}`);
+  return res.json();
+}
+
+async function getSegmentMembers(key: string, limit = 50, offset = 0): Promise<{ items: SegmentMember[]; total: number }> {
+  const res = await fetch(`${BASE}/${key}/members?limit=${limit}&offset=${offset}`, { headers: getAuthHeaders() });
+  if (!res.ok) throw new Error(`${res.status}`);
+  return res.json();
+}
+
+async function syncSegment(key: string, tenantIds: string[]): Promise<void> {
+  const res = await fetch(`${BASE}/${key}/sync`, {
+    method: 'POST', headers: getAuthHeaders(), body: JSON.stringify({ tenantIds }),
+  });
+  if (!res.ok) throw new Error(`${res.status}`);
+}
+
+async function addToSegment(key: string, tenantIds: string[]): Promise<void> {
+  const res = await fetch(`${BASE}/${key}/add`, {
+    method: 'POST', headers: getAuthHeaders(), body: JSON.stringify({ tenantIds }),
+  });
+  if (!res.ok) throw new Error(`${res.status}`);
+}
+
+async function removeFromSegment(key: string, tenantIds: string[]): Promise<void> {
+  const res = await fetch(`${BASE}/${key}/remove`, {
+    method: 'POST', headers: getAuthHeaders(), body: JSON.stringify({ tenantIds }),
+  });
+  if (!res.ok) throw new Error(`${res.status}`);
+}
+
+async function deleteSegment(key: string): Promise<void> {
+  const res = await fetch(`${BASE}/${key}`, { method: 'DELETE', headers: getAuthHeaders() });
+  if (!res.ok) throw new Error(`${res.status}`);
+}
+
+/* ---------- Segment detail panel ---------- */
+
+function SegmentDetail({
+  segmentKey,
+  onClose,
+  onRefresh,
+}: {
+  segmentKey: string;
+  onClose: () => void;
+  onRefresh: () => void;
+}) {
+  const [members, setMembers] = useState<SegmentMember[]>([]);
+  const [total, setTotal] = useState(0);
+  const [loading, setLoading] = useState(false);
+  const [offset, setOffset] = useState(0);
+  const limit = 50;
+
+  const [addRaw, setAddRaw] = useState('');
+  const [syncRaw, setSyncRaw] = useState('');
+  const [saving, setSaving] = useState(false);
+  const [error, setError] = useState('');
+
+  const loadMembers = useCallback(async () => {
+    setLoading(true);
+    try {
+      const result = await getSegmentMembers(segmentKey, limit, offset);
+      setMembers(result.items);
+      setTotal(result.total);
+    } catch (e) { console.error(e); }
+    finally { setLoading(false); }
+  }, [segmentKey, offset]);
+
+  useEffect(() => { loadMembers(); }, [loadMembers]);
+
+  const handleAdd = async () => {
+    const ids = addRaw.split(/[\n,]+/).map((s) => s.trim()).filter(Boolean);
+    if (!ids.length) return;
+    setSaving(true); setError('');
+    try {
+      await addToSegment(segmentKey, ids);
+      setAddRaw('');
+      await loadMembers();
+      onRefresh();
+    } catch (e: any) {
+      setError(e.message);
+    } finally { setSaving(false); }
+  };
+
+  const handleSync = async () => {
+    const ids = syncRaw.split(/[\n,]+/).map((s) => s.trim()).filter(Boolean);
+    if (!confirm(`确认用 ${ids.length} 个租户 ID 替换「${segmentKey}」的全部成员？`)) return;
+    setSaving(true); setError('');
+    try {
+      await syncSegment(segmentKey, ids);
+      setSyncRaw('');
+      await loadMembers();
+      onRefresh();
+    } catch (e: any) {
+      setError(e.message);
+    } finally { setSaving(false); }
+  };
+
+  const handleRemove = async (tenantId: string) => {
+    await removeFromSegment(segmentKey, [tenantId]);
+    await loadMembers();
+    onRefresh();
+  };
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-end sm:items-center justify-center bg-black/40 p-4">
+      <div className="bg-card w-full max-w-2xl rounded-xl shadow-xl border flex flex-col max-h-[85vh]">
+        <div className="flex items-center justify-between px-6 py-4 border-b">
+          <div>
+            <h2 className="text-base font-semibold font-mono">{segmentKey}</h2>
+            <p className="text-xs text-muted-foreground">共 {total} 个成员租户</p>
+          </div>
+          <button onClick={onClose} className="text-muted-foreground hover:text-foreground"><X className="h-4 w-4" /></button>
+        </div>
+
+        <div className="flex-1 overflow-y-auto px-6 py-4 space-y-4">
+          {error && <p className="text-sm text-red-500">{error}</p>}
+
+          {/* Add tenants */}
+          <div>
+            <label className="block text-xs font-medium mb-1">新增租户（每行一个 ID）</label>
+            <textarea
+              className="w-full rounded-md border bg-background px-3 py-2 text-sm font-mono outline-none focus:ring-1 focus:ring-primary resize-none"
+              rows={3} value={addRaw} onChange={(e) => setAddRaw(e.target.value)}
+              placeholder="tenant-uuid-1&#10;tenant-uuid-2"
+            />
+            <button onClick={handleAdd} disabled={saving || !addRaw.trim()}
+              className="mt-2 flex items-center gap-1.5 px-3 py-1.5 text-xs rounded-md bg-primary text-primary-foreground hover:bg-primary/90 disabled:opacity-50 transition-colors">
+              添加成员
+            </button>
+          </div>
+
+          {/* Bulk sync */}
+          <div className="border rounded-lg p-3 bg-muted/30">
+            <div className="flex items-center gap-1.5 mb-1">
+              <Upload className="h-3.5 w-3.5 text-muted-foreground" />
+              <label className="text-xs font-medium">全量替换（ETL 同步）</label>
+            </div>
+            <textarea
+              className="w-full rounded-md border bg-background px-3 py-2 text-sm font-mono outline-none focus:ring-1 focus:ring-primary resize-none"
+              rows={3} value={syncRaw} onChange={(e) => setSyncRaw(e.target.value)}
+              placeholder="全量租户 ID，将替换现有成员"
+            />
+            <button onClick={handleSync} disabled={saving || !syncRaw.trim()}
+              className="mt-2 flex items-center gap-1.5 px-3 py-1.5 text-xs rounded-md bg-orange-600 text-white hover:bg-orange-700 disabled:opacity-50 transition-colors">
+              全量替换
+            </button>
+          </div>
+
+          {/* Members list */}
+          <div>
+            <p className="text-xs font-medium mb-2 text-muted-foreground">当前成员 ({total})</p>
+            <div className="border rounded-lg divide-y max-h-60 overflow-y-auto">
+              {loading ? (
+                <p className="text-center py-4 text-sm text-muted-foreground">加载中…</p>
+              ) : members.length === 0 ? (
+                <p className="text-center py-4 text-sm text-muted-foreground">暂无成员</p>
+              ) : (
+                members.map((m) => (
+                  <div key={m.tenantId} className="flex items-center justify-between px-3 py-2 hover:bg-muted/30">
+                    <span className="text-xs font-mono text-muted-foreground">{m.tenantId}</span>
+                    <div className="flex items-center gap-2">
+                      <span className="text-xs text-muted-foreground">
+                        {new Date(m.syncedAt).toLocaleDateString('zh-CN')}
+                      </span>
+                      <button onClick={() => handleRemove(m.tenantId)}
+                        className="p-1 rounded hover:bg-red-50 text-muted-foreground hover:text-red-600 transition-colors">
+                        <Trash2 className="h-3.5 w-3.5" />
+                      </button>
+                    </div>
+                  </div>
+                ))
+              )}
+            </div>
+            {total > limit && (
+              <div className="flex gap-2 mt-2">
+                <button disabled={offset === 0} onClick={() => setOffset(Math.max(0, offset - limit))}
+                  className="px-3 py-1 text-xs rounded border hover:bg-accent disabled:opacity-40">上一页</button>
+                <button disabled={offset + limit >= total} onClick={() => setOffset(offset + limit)}
+                  className="px-3 py-1 text-xs rounded border hover:bg-accent disabled:opacity-40">下一页</button>
+              </div>
+            )}
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+/* ---------- Main page ---------- */
+
+export default function SegmentsPage() {
+  const [segments, setSegments] = useState<SegmentInfo[]>([]);
+  const [loading, setLoading] = useState(false);
+  const [selectedKey, setSelectedKey] = useState<string | null>(null);
+  const [deleting, setDeleting] = useState<string | null>(null);
+
+  const load = useCallback(async () => {
+    setLoading(true);
+    try { setSegments(await listSegments()); }
+    catch (e) { console.error(e); }
+    finally { setLoading(false); }
+  }, []);
+
+  useEffect(() => { load(); }, [load]);
+
+  const handleDelete = async (key: string) => {
+    if (!confirm(`确认删除人群包「${key}」？`)) return;
+    setDeleting(key);
+    try { await deleteSegment(key); await load(); }
+    finally { setDeleting(null); }
+  };
+
+  return (
+    <div className="flex-1 flex flex-col min-h-0 p-6">
+      <div className="flex items-center justify-between mb-6">
+        <div className="flex items-center gap-2">
+          <Users2 className="h-5 w-5 text-primary" />
+          <h1 className="text-xl font-semibold">人群包管理</h1>
+          <span className="text-xs text-muted-foreground ml-1">（BY_SEGMENT 精准推送）</span>
+        </div>
+        <button onClick={load} disabled={loading}
+          className="flex items-center gap-1.5 px-3 py-1.5 text-sm rounded-md border hover:bg-accent transition-colors">
+          <RefreshCw className={cn('h-3.5 w-3.5', loading && 'animate-spin')} />刷新
+        </button>
+      </div>
+
+      {/* Description */}
+      <div className="mb-4 p-3 bg-blue-50 dark:bg-blue-950/30 rounded-lg text-xs text-blue-700 dark:text-blue-300">
+        <strong>说明：</strong>人群包是一组租户 ID 集合，可用于「按人群包」精准推送通知。
+        可通过 API 或此界面手动管理，也可由外部 ETL 作业定期同步。
+        在通知表单中，选择「按人群包」并输入对应的 segment key 即可定向推送。
+      </div>
+
+      {loading && segments.length === 0 ? (
+        <p className="text-muted-foreground text-sm">加载中…</p>
+      ) : segments.length === 0 ? (
+        <div className="flex flex-col items-center justify-center flex-1 text-muted-foreground gap-3">
+          <Users2 className="h-12 w-12 opacity-20" />
+          <p className="text-sm">暂无人群包。点击某个分组名称或通过 API 的 <code>/sync</code> 接口创建。</p>
+          <p className="text-xs">例：<code>POST /api/v1/notifications/segments/trial_ending_soon/sync</code></p>
+        </div>
+      ) : (
+        <div className="flex-1 min-h-0 overflow-auto rounded-lg border bg-card">
+          <table className="w-full text-sm">
+            <thead className="bg-muted/50 sticky top-0">
+              <tr>
+                <th className="text-left px-4 py-3 font-medium text-muted-foreground">Segment Key</th>
+                <th className="text-left px-4 py-3 font-medium text-muted-foreground">成员数</th>
+                <th className="text-left px-4 py-3 font-medium text-muted-foreground">最近同步</th>
+                <th className="text-right px-4 py-3 font-medium text-muted-foreground">操作</th>
+              </tr>
+            </thead>
+            <tbody className="divide-y">
+              {segments.map((seg) => (
+                <tr key={seg.segmentKey} className="hover:bg-muted/30 transition-colors">
+                  <td className="px-4 py-3 font-mono text-sm font-medium">{seg.segmentKey}</td>
+                  <td className="px-4 py-3">
+                    <span className="px-2 py-0.5 rounded bg-primary/10 text-primary text-xs font-medium">
+                      {seg.memberCount.toLocaleString()} 租户
+                    </span>
+                  </td>
+                  <td className="px-4 py-3 text-xs text-muted-foreground">
+                    {seg.syncedAt ? new Date(seg.syncedAt).toLocaleString('zh-CN', { dateStyle: 'short', timeStyle: 'short' }) : '—'}
+                  </td>
+                  <td className="px-4 py-3">
+                    <div className="flex items-center justify-end gap-1">
+                      <button onClick={() => setSelectedKey(seg.segmentKey)}
+                        className="flex items-center gap-1 px-2 py-1 rounded text-xs hover:bg-accent text-muted-foreground hover:text-foreground transition-colors">
+                        管理 <ChevronRight className="h-3 w-3" />
+                      </button>
+                      <button onClick={() => handleDelete(seg.segmentKey)} disabled={deleting === seg.segmentKey}
+                        className="p-1.5 rounded hover:bg-red-50 text-muted-foreground hover:text-red-600 transition-colors disabled:opacity-50">
+                        <Trash2 className="h-4 w-4" />
+                      </button>
+                    </div>
+                  </td>
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        </div>
+      )}
+
+      {selectedKey && (
+        <SegmentDetail
+          segmentKey={selectedKey}
+          onClose={() => setSelectedKey(null)}
+          onRefresh={load}
+        />
+      )}
+    </div>
+  );
+}
diff --git a/it0-web-admin/src/app/(admin)/tenant-tags/page.tsx b/it0-web-admin/src/app/(admin)/tenant-tags/page.tsx
new file mode 100644
index 0000000..0e97ce2
--- /dev/null
+++ b/it0-web-admin/src/app/(admin)/tenant-tags/page.tsx
@@ -0,0 +1,279 @@
+'use client';
+
+import { useState, useEffect, useCallback } from 'react';
+import { Tags, Plus, RefreshCw, Pencil, Trash2, X } from 'lucide-react';
+import { cn } from '@/lib/utils';
+import { TenantTag, CreateTenantTagDto, UpdateTenantTagDto } from '@/domain/entities/tenant-tag';
+import {
+  listTenantTags,
+  createTenantTag,
+  updateTenantTag,
+  deleteTenantTag,
+} from '@/infrastructure/repositories/api-tenant-tag.repository';
+
+/* ---------- Color picker presets ---------- */
+
+const COLOR_PRESETS = [
+  '#6366F1', '#8B5CF6', '#EC4899', '#EF4444',
+  '#F97316', '#EAB308', '#22C55E', '#14B8A6',
+  '#3B82F6', '#64748B',
+];
+
+/* ---------- Tag Modal ---------- */
+
+function TagModal({
+  initial,
+  onSave,
+  onClose,
+}: {
+  initial?: TenantTag;
+  onSave: (dto: CreateTenantTagDto | UpdateTenantTagDto, id?: string) => Promise<void>;
+  onClose: () => void;
+}) {
+  const [name, setName] = useState(initial?.name ?? '');
+  const [color, setColor] = useState(initial?.color ?? '#6366F1');
+  const [description, setDescription] = useState(initial?.description ?? '');
+  const [saving, setSaving] = useState(false);
+  const [error, setError] = useState('');
+
+  const handleSubmit = async () => {
+    if (!name.trim()) { setError('标签名不能为空'); return; }
+    setSaving(true);
+    setError('');
+    try {
+      await onSave({ name: name.trim(), color, description: description.trim() || undefined }, initial?.id);
+      onClose();
+    } catch (e: any) {
+      setError(e.message ?? '保存失败');
+    } finally {
+      setSaving(false);
+    }
+  };
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/40 p-4">
+      <div className="bg-card w-full max-w-md rounded-xl shadow-xl border flex flex-col">
+        <div className="flex items-center justify-between px-6 py-4 border-b">
+          <h2 className="text-base font-semibold">{initial ? '编辑标签' : '新建标签'}</h2>
+          <button onClick={onClose} className="text-muted-foreground hover:text-foreground">
+            <X className="h-4 w-4" />
+          </button>
+        </div>
+
+        <div className="px-6 py-4 space-y-4">
+          {error && <p className="text-sm text-red-500">{error}</p>}
+
+          <div>
+            <label className="block text-xs font-medium mb-1">标签名 *</label>
+            <input
+              className="w-full rounded-md border bg-background px-3 py-2 text-sm outline-none focus:ring-1 focus:ring-primary"
+              value={name}
+              onChange={(e) => setName(e.target.value)}
+              maxLength={50}
+              placeholder="例如: 高价值客户"
+            />
+          </div>
+
+          <div>
+            <label className="block text-xs font-medium mb-1">标签颜色</label>
+            <div className="flex flex-wrap gap-2 mb-2">
+              {COLOR_PRESETS.map((c) => (
+                <button
+                  key={c}
+                  type="button"
+                  onClick={() => setColor(c)}
+                  className={cn(
+                    'w-7 h-7 rounded-full border-2 transition-all',
+                    color === c ? 'border-foreground scale-110' : 'border-transparent',
+                  )}
+                  style={{ backgroundColor: c }}
+                />
+              ))}
+            </div>
+            <div className="flex items-center gap-2">
+              <input
+                type="color"
+                value={color}
+                onChange={(e) => setColor(e.target.value)}
+                className="h-8 w-12 rounded border cursor-pointer"
+              />
+              <span className="text-sm font-mono text-muted-foreground">{color}</span>
+              <span
+                className="px-3 py-0.5 rounded-full text-xs font-medium text-white"
+                style={{ backgroundColor: color }}
+              >
+                预览
+              </span>
+            </div>
+          </div>
+
+          <div>
+            <label className="block text-xs font-medium mb-1">描述（可选）</label>
+            <textarea
+              className="w-full rounded-md border bg-background px-3 py-2 text-sm outline-none focus:ring-1 focus:ring-primary resize-none"
+              rows={2}
+              value={description}
+              onChange={(e) => setDescription(e.target.value)}
+              placeholder="该标签的用途说明"
+            />
+          </div>
+        </div>
+
+        <div className="flex justify-end gap-2 px-6 py-4 border-t">
+          <button
+            onClick={onClose}
+            className="px-4 py-2 text-sm rounded-md border hover:bg-accent transition-colors"
+          >
+            取消
+          </button>
+          <button
+            onClick={handleSubmit}
+            disabled={saving}
+            className="px-4 py-2 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 transition-colors disabled:opacity-50"
+          >
+            {saving ? '保存中…' : '保存'}
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+/* ---------- Main page ---------- */
+
+export default function TenantTagsPage() {
+  const [tags, setTags] = useState<TenantTag[]>([]);
+  const [loading, setLoading] = useState(false);
+  const [modal, setModal] = useState<{ mode: 'create' } | { mode: 'edit'; tag: TenantTag } | null>(null);
+  const [deleting, setDeleting] = useState<string | null>(null);
+
+  const load = useCallback(async () => {
+    setLoading(true);
+    try {
+      const data = await listTenantTags();
+      setTags(data);
+    } catch (e) {
+      console.error(e);
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  useEffect(() => { load(); }, [load]);
+
+  const handleSave = async (dto: CreateTenantTagDto | UpdateTenantTagDto, id?: string) => {
+    if (id) {
+      await updateTenantTag(id, dto as UpdateTenantTagDto);
+    } else {
+      await createTenantTag(dto as CreateTenantTagDto);
+    }
+    await load();
+  };
+
+  const handleDelete = async (tag: TenantTag) => {
+    if (!confirm(`确认删除标签「${tag.name}」？删除后相关租户的标签绑定也会清除。`)) return;
+    setDeleting(tag.id);
+    try {
+      await deleteTenantTag(tag.id);
+      await load();
+    } finally {
+      setDeleting(null);
+    }
+  };
+
+  return (
+    <div className="flex-1 flex flex-col min-h-0 p-6">
+      {/* header */}
+      <div className="flex items-center justify-between mb-6">
+        <div className="flex items-center gap-2">
+          <Tags className="h-5 w-5 text-primary" />
+          <h1 className="text-xl font-semibold">租户标签管理</h1>
+          <span className="text-xs text-muted-foreground ml-1">（用于精准推送分组）</span>
+        </div>
+        <div className="flex items-center gap-2">
+          <button
+            onClick={load}
+            disabled={loading}
+            className="flex items-center gap-1.5 px-3 py-1.5 text-sm rounded-md border hover:bg-accent transition-colors"
+          >
+            <RefreshCw className={cn('h-3.5 w-3.5', loading && 'animate-spin')} />
+            刷新
+          </button>
+          <button
+            onClick={() => setModal({ mode: 'create' })}
+            className="flex items-center gap-1.5 px-3 py-1.5 text-sm rounded-md bg-primary text-primary-foreground hover:bg-primary/90 transition-colors"
+          >
+            <Plus className="h-3.5 w-3.5" />
+            新建标签
+          </button>
+        </div>
+      </div>
+
+      {/* tag grid */}
+      {loading && tags.length === 0 ? (
+        <p className="text-muted-foreground text-sm">加载中…</p>
+      ) : tags.length === 0 ? (
+        <div className="flex flex-col items-center justify-center flex-1 text-muted-foreground gap-3">
+          <Tags className="h-12 w-12 opacity-20" />
+          <p className="text-sm">暂无标签，点击「新建标签」创建第一个标签</p>
+        </div>
+      ) : (
+        <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-4">
+          {tags.map((tag) => (
+            <div
+              key={tag.id}
+              className="bg-card border rounded-xl p-4 flex flex-col gap-3 hover:shadow-sm transition-shadow"
+            >
+              {/* tag header */}
+              <div className="flex items-center justify-between">
+                <span
+                  className="px-3 py-1 rounded-full text-sm font-medium text-white"
+                  style={{ backgroundColor: tag.color }}
+                >
+                  {tag.name}
+                </span>
+                <div className="flex items-center gap-1">
+                  <button
+                    onClick={() => setModal({ mode: 'edit', tag })}
+                    className="p-1.5 rounded hover:bg-accent text-muted-foreground hover:text-foreground transition-colors"
+                  >
+                    <Pencil className="h-3.5 w-3.5" />
+                  </button>
+                  <button
+                    onClick={() => handleDelete(tag)}
+                    disabled={deleting === tag.id}
+                    className="p-1.5 rounded hover:bg-red-50 text-muted-foreground hover:text-red-600 transition-colors disabled:opacity-50"
+                  >
+                    <Trash2 className="h-3.5 w-3.5" />
+                  </button>
+                </div>
+              </div>
+
+              {/* description */}
+              {tag.description && (
+                <p className="text-xs text-muted-foreground line-clamp-2">{tag.description}</p>
+              )}
+
+              {/* meta */}
+              <div className="flex items-center justify-between text-xs text-muted-foreground mt-auto">
+                <span>
+                  {tag.tenantCount != null ? `${tag.tenantCount} 个租户` : '—'}
+                </span>
+                <span>{new Date(tag.createdAt).toLocaleDateString('zh-CN')}</span>
+              </div>
+            </div>
+          ))}
+        </div>
+      )}
+
+      {/* modal */}
+      {modal && (
+        <TagModal
+          initial={modal.mode === 'edit' ? modal.tag : undefined}
+          onSave={handleSave}
+          onClose={() => setModal(null)}
+        />
+      )}
+    </div>
+  );
+}
diff --git a/it0-web-admin/src/domain/entities/notification.ts b/it0-web-admin/src/domain/entities/notification.ts
new file mode 100644
index 0000000..a91da4a
--- /dev/null
+++ b/it0-web-admin/src/domain/entities/notification.ts
@@ -0,0 +1,102 @@
+export type NotificationType =
+  | 'SYSTEM'
+  | 'MAINTENANCE'
+  | 'FEATURE'
+  | 'ANNOUNCEMENT'
+  | 'BILLING'
+  | 'SECURITY';
+
+export type NotificationPriority = 'LOW' | 'NORMAL' | 'HIGH' | 'URGENT';
+
+export type TargetType =
+  | 'ALL'
+  | 'SPECIFIC_TENANTS'
+  | 'SPECIFIC_USERS'
+  | 'BY_TENANT_TAG'
+  | 'BY_PLAN'
+  | 'BY_TENANT_STATUS'
+  | 'BY_SEGMENT';
+
+export type TagLogic = 'ANY' | 'ALL';
+
+export interface NotificationItem {
+  id: string;
+  title: string;
+  content: string;
+  type: NotificationType;
+  priority: NotificationPriority;
+  targetType: TargetType;
+  tenantIds?: string[];
+  userIds?: string[];
+  targetTagIds?: string[] | null;
+  targetTagLogic?: TagLogic;
+  targetPlans?: string[] | null;
+  targetStatuses?: string[] | null;
+  targetSegment?: string | null;
+  channelKey?: string | null;
+  imageUrl: string | null;
+  linkUrl: string | null;
+  requiresForceRead: boolean;
+  isEnabled: boolean;
+  publishedAt: string | null;
+  expiresAt: string | null;
+  createdBy: string | null;
+  createdAt: string;
+  updatedAt: string;
+}
+
+export interface NotificationListResult {
+  items: NotificationItem[];
+  total: number;
+}
+
+export interface CreateNotificationPayload {
+  title: string;
+  content: string;
+  type: NotificationType;
+  priority: NotificationPriority;
+  targetType: TargetType;
+  tenantIds?: string[];
+  userIds?: string[];
+  targetTagIds?: string[];
+  targetTagLogic?: TagLogic;
+  targetPlans?: string[];
+  targetStatuses?: string[];
+  targetSegment?: string | null;
+  channelKey?: string | null;
+  imageUrl?: string | null;
+  linkUrl?: string | null;
+  requiresForceRead: boolean;
+  isEnabled: boolean;
+  publishedAt?: string | null;
+  expiresAt?: string | null;
+}
+
+export const NOTIFICATION_TYPE_OPTIONS: { value: NotificationType; label: string; color: string }[] = [
+  { value: 'SYSTEM',       label: '系统通知',   color: 'bg-gray-100 text-gray-700' },
+  { value: 'MAINTENANCE',  label: '维护通知',   color: 'bg-orange-100 text-orange-700' },
+  { value: 'FEATURE',      label: '新功能',     color: 'bg-green-100 text-green-700' },
+  { value: 'ANNOUNCEMENT', label: '公告',       color: 'bg-blue-100 text-blue-700' },
+  { value: 'BILLING',      label: '账单通知',   color: 'bg-purple-100 text-purple-700' },
+  { value: 'SECURITY',     label: '安全通知',   color: 'bg-red-100 text-red-700' },
+];
+
+export const NOTIFICATION_PRIORITY_OPTIONS: { value: NotificationPriority; label: string }[] = [
+  { value: 'LOW',    label: '低' },
+  { value: 'NORMAL', label: '普通' },
+  { value: 'HIGH',   label: '高' },
+  { value: 'URGENT', label: '紧急' },
+];
+
+export const TARGET_TYPE_OPTIONS: { value: TargetType; label: string; desc: string }[] = [
+  { value: 'ALL',              label: '全部租户',    desc: '发送给平台所有租户' },
+  { value: 'SPECIFIC_TENANTS', label: '指定租户',    desc: '手动输入租户 ID 列表' },
+  { value: 'SPECIFIC_USERS',   label: '指定用户',    desc: '手动输入用户 ID 列表' },
+  { value: 'BY_TENANT_TAG',    label: '按标签',      desc: '推送给拥有指定标签的租户' },
+  { value: 'BY_PLAN',          label: '按套餐',      desc: '推送给特定订阅套餐的租户' },
+  { value: 'BY_TENANT_STATUS', label: '按租户状态',  desc: '推送给特定状态的租户' },
+  { value: 'BY_SEGMENT',       label: '按人群包',    desc: '推送给预定义分群的租户' },
+];
+
+export const PLAN_OPTIONS = ['free', 'pro', 'enterprise'];
+export const STATUS_OPTIONS = ['active', 'suspended', 'trial', 'expired'];
diff --git a/it0-web-admin/src/domain/entities/tenant-tag.ts b/it0-web-admin/src/domain/entities/tenant-tag.ts
new file mode 100644
index 0000000..1eb9bf6
--- /dev/null
+++ b/it0-web-admin/src/domain/entities/tenant-tag.ts
@@ -0,0 +1,29 @@
+export interface TenantTag {
+  id: string;
+  name: string;
+  color: string;
+  description: string | null;
+  createdBy: string | null;
+  createdAt: string;
+  updatedAt: string;
+  tenantCount?: number;
+}
+
+export interface TenantTagAssignment {
+  tenantId: string;
+  tagId: string;
+  taggedBy: string | null;
+  taggedAt: string;
+}
+
+export interface CreateTenantTagDto {
+  name: string;
+  color?: string;
+  description?: string;
+}
+
+export interface UpdateTenantTagDto {
+  name?: string;
+  color?: string;
+  description?: string;
+}
diff --git a/it0-web-admin/src/i18n/locales/en/sidebar.json b/it0-web-admin/src/i18n/locales/en/sidebar.json
index 466e8bf..9f15b0e 100644
--- a/it0-web-admin/src/i18n/locales/en/sidebar.json
+++ b/it0-web-admin/src/i18n/locales/en/sidebar.json
@@ -33,6 +33,11 @@
   "billingInvoices": "Invoices",
   "appVersions": "App Versions",
   "referral": "Referrals",
+  "tenantTags": "Tenant Tags",
+  "notificationChannels": "Notification Channels",
+  "campaigns": "Campaigns",
+  "segments": "Audience Segments",
+  "notifications": "Notifications",
   "tenants": "Tenants",
   "users": "Users",
   "settings": "Settings",
diff --git a/it0-web-admin/src/i18n/locales/zh/sidebar.json b/it0-web-admin/src/i18n/locales/zh/sidebar.json
index e2d0863..c8d54ef 100644
--- a/it0-web-admin/src/i18n/locales/zh/sidebar.json
+++ b/it0-web-admin/src/i18n/locales/zh/sidebar.json
@@ -33,6 +33,11 @@
   "billingInvoices": "账单列表",
   "appVersions": "App 版本管理",
   "referral": "推荐管理",
+  "tenantTags": "租户标签",
+  "notificationChannels": "通知频道",
+  "campaigns": "推送活动",
+  "segments": "人群包",
+  "notifications": "消息管理",
   "tenants": "租户",
   "users": "用户",
   "settings": "设置",
diff --git a/it0-web-admin/src/infrastructure/repositories/api-notification.repository.ts b/it0-web-admin/src/infrastructure/repositories/api-notification.repository.ts
new file mode 100644
index 0000000..b31ff9e
--- /dev/null
+++ b/it0-web-admin/src/infrastructure/repositories/api-notification.repository.ts
@@ -0,0 +1,76 @@
+import {
+  NotificationItem,
+  NotificationListResult,
+  CreateNotificationPayload,
+} from '@/domain/entities/notification';
+
+function getAuthHeaders(): HeadersInit {
+  const token = typeof window !== 'undefined' ? localStorage.getItem('token') : null;
+  return {
+    Authorization: `Bearer ${token ?? ''}`,
+    'Content-Type': 'application/json',
+  };
+}
+
+const BASE = '/api/proxy';
+
+export async function listAdminNotifications(params: {
+  type?: string;
+  targetType?: string;
+  limit?: number;
+  offset?: number;
+}): Promise<NotificationListResult> {
+  const q = new URLSearchParams();
+  if (params.type) q.set('type', params.type);
+  if (params.targetType) q.set('targetType', params.targetType);
+  if (params.limit != null) q.set('limit', String(params.limit));
+  if (params.offset != null) q.set('offset', String(params.offset));
+  const res = await fetch(`${BASE}/api/v1/notifications/admin?${q}`, {
+    headers: getAuthHeaders(),
+  });
+  if (!res.ok) throw new Error(`Failed to fetch notifications: ${res.status}`);
+  return res.json();
+}
+
+export async function getAdminNotification(id: string): Promise<NotificationItem> {
+  const res = await fetch(`${BASE}/api/v1/notifications/admin/${id}`, {
+    headers: getAuthHeaders(),
+  });
+  if (!res.ok) throw new Error(`Failed to fetch notification: ${res.status}`);
+  return res.json();
+}
+
+export async function createNotification(payload: CreateNotificationPayload): Promise<NotificationItem> {
+  const res = await fetch(`${BASE}/api/v1/notifications/admin`, {
+    method: 'POST',
+    headers: getAuthHeaders(),
+    body: JSON.stringify(payload),
+  });
+  if (!res.ok) throw new Error(`Failed to create notification: ${res.status}`);
+  return res.json();
+}
+
+export async function updateNotification(
+  id: string,
+  payload: Partial<CreateNotificationPayload>,
+): Promise<NotificationItem> {
+  const res = await fetch(`${BASE}/api/v1/notifications/admin/${id}`, {
+    method: 'PUT',
+    headers: getAuthHeaders(),
+    body: JSON.stringify(payload),
+  });
+  if (!res.ok) throw new Error(`Failed to update notification: ${res.status}`);
+  return res.json();
+}
+
+export async function deleteNotification(id: string): Promise<void> {
+  const res = await fetch(`${BASE}/api/v1/notifications/admin/${id}`, {
+    method: 'DELETE',
+    headers: getAuthHeaders(),
+  });
+  if (!res.ok) throw new Error(`Failed to delete notification: ${res.status}`);
+}
+
+export async function toggleNotification(id: string, isEnabled: boolean): Promise<NotificationItem> {
+  return updateNotification(id, { isEnabled });
+}
diff --git a/it0-web-admin/src/infrastructure/repositories/api-tenant-tag.repository.ts b/it0-web-admin/src/infrastructure/repositories/api-tenant-tag.repository.ts
new file mode 100644
index 0000000..41b1a9c
--- /dev/null
+++ b/it0-web-admin/src/infrastructure/repositories/api-tenant-tag.repository.ts
@@ -0,0 +1,76 @@
+import { TenantTag, CreateTenantTagDto, UpdateTenantTagDto } from '@/domain/entities/tenant-tag';
+
+function getAuthHeaders(): HeadersInit {
+  const token = localStorage.getItem('token');
+  const tenantId = localStorage.getItem('tenantId');
+  return {
+    Authorization: `Bearer ${token}`,
+    'Content-Type': 'application/json',
+    ...(tenantId ? { 'X-Tenant-Id': tenantId } : {}),
+  };
+}
+
+const BASE = '/api/proxy';
+
+export async function listTenantTags(): Promise<TenantTag[]> {
+  const res = await fetch(`${BASE}/api/v1/admin/tenant-tags`, { headers: getAuthHeaders() });
+  if (!res.ok) throw new Error(`Failed to fetch tenant tags: ${res.status}`);
+  return res.json();
+}
+
+export async function createTenantTag(dto: CreateTenantTagDto): Promise<TenantTag> {
+  const res = await fetch(`${BASE}/api/v1/admin/tenant-tags`, {
+    method: 'POST',
+    headers: getAuthHeaders(),
+    body: JSON.stringify(dto),
+  });
+  if (!res.ok) throw new Error(`Failed to create tenant tag: ${res.status}`);
+  return res.json();
+}
+
+export async function updateTenantTag(id: string, dto: UpdateTenantTagDto): Promise<TenantTag> {
+  const res = await fetch(`${BASE}/api/v1/admin/tenant-tags/${id}`, {
+    method: 'PUT',
+    headers: getAuthHeaders(),
+    body: JSON.stringify(dto),
+  });
+  if (!res.ok) throw new Error(`Failed to update tenant tag: ${res.status}`);
+  return res.json();
+}
+
+export async function deleteTenantTag(id: string): Promise<void> {
+  const res = await fetch(`${BASE}/api/v1/admin/tenant-tags/${id}`, {
+    method: 'DELETE',
+    headers: getAuthHeaders(),
+  });
+  if (!res.ok) throw new Error(`Failed to delete tenant tag: ${res.status}`);
+}
+
+export async function getTagTenants(tagId: string): Promise<{ tenantId: string; tenantName: string }[]> {
+  const res = await fetch(`${BASE}/api/v1/admin/tenant-tags/${tagId}/tenants`, { headers: getAuthHeaders() });
+  if (!res.ok) throw new Error(`Failed to fetch tag tenants: ${res.status}`);
+  return res.json();
+}
+
+export async function getTenantTags(tenantId: string): Promise<TenantTag[]> {
+  const res = await fetch(`${BASE}/api/v1/admin/tenant-tags/tenants/${tenantId}`, { headers: getAuthHeaders() });
+  if (!res.ok) throw new Error(`Failed to fetch tenant tags: ${res.status}`);
+  return res.json();
+}
+
+export async function assignTagToTenants(tagId: string, tenantIds: string[]): Promise<void> {
+  const res = await fetch(`${BASE}/api/v1/admin/tenant-tags/${tagId}/assign`, {
+    method: 'POST',
+    headers: getAuthHeaders(),
+    body: JSON.stringify({ tenantIds }),
+  });
+  if (!res.ok) throw new Error(`Failed to assign tag: ${res.status}`);
+}
+
+export async function removeTagFromTenant(tagId: string, tenantId: string): Promise<void> {
+  const res = await fetch(`${BASE}/api/v1/admin/tenant-tags/${tagId}/assign/${tenantId}`, {
+    method: 'DELETE',
+    headers: getAuthHeaders(),
+  });
+  if (!res.ok) throw new Error(`Failed to remove tag assignment: ${res.status}`);
+}
diff --git a/it0-web-admin/src/presentation/components/layout/sidebar.tsx b/it0-web-admin/src/presentation/components/layout/sidebar.tsx
index ba60397..23f7202 100644
--- a/it0-web-admin/src/presentation/components/layout/sidebar.tsx
+++ b/it0-web-admin/src/presentation/components/layout/sidebar.tsx
@@ -27,6 +27,11 @@ import {
   Database,
   Boxes,
   Gift,
+  Bell,
+  Tags,
+  Radio,
+  Megaphone,
+  Users2,
 } from 'lucide-react';
 
 /* ---------- Sidebar context for collapse state ---------- */
@@ -112,6 +117,11 @@ export function Sidebar() {
     { key: 'users', label: t('users'), href: '/users', icon: <Users className={iconClass} /> },
     { key: 'appVersions', label: t('appVersions'), href: '/app-versions', icon: <Smartphone className={iconClass} /> },
     { key: 'referral', label: t('referral'), href: '/referral', icon: <Gift className={iconClass} /> },
+    { key: 'tenantTags', label: t('tenantTags'), href: '/tenant-tags', icon: <Tags className={iconClass} /> },
+    { key: 'notificationChannels', label: t('notificationChannels'), href: '/notification-channels', icon: <Radio className={iconClass} /> },
+    { key: 'campaigns', label: t('campaigns'), href: '/campaigns', icon: <Megaphone className={iconClass} /> },
+    { key: 'segments', label: t('segments'), href: '/segments', icon: <Users2 className={iconClass} /> },
+    { key: 'notifications', label: t('notifications'), href: '/notifications', icon: <Bell className={iconClass} /> },
     { key: 'serverPool', label: '服务器池', href: '/server-pool', icon: <Database className={iconClass} /> },
     { key: 'openclawInstances', label: 'OpenClaw 实例', href: '/openclaw-instances', icon: <Boxes className={iconClass} /> },
     {
diff --git a/it0_app/lib/core/router/app_router.dart b/it0_app/lib/core/router/app_router.dart
index 2ab9cff..11c9321 100644
--- a/it0_app/lib/core/router/app_router.dart
+++ b/it0_app/lib/core/router/app_router.dart
@@ -15,6 +15,8 @@ import '../../features/my_agents/presentation/pages/my_agents_page.dart';
 import '../../features/billing/presentation/pages/billing_overview_page.dart';
 import '../../features/profile/presentation/pages/profile_page.dart';
 import '../../features/notifications/presentation/providers/notification_providers.dart';
+import '../../features/notifications/presentation/pages/notification_inbox_page.dart';
+import '../../features/notifications/presentation/pages/notification_preferences_page.dart';
 import '../../features/referral/presentation/screens/referral_screen.dart';
 
 // ---------------------------------------------------------------------------
@@ -56,6 +58,14 @@ final routerProvider = Provider<GoRouter>((ref) {
             path: '/referral',
             builder: (context, state) => const ReferralScreen(),
           ),
+          GoRoute(
+            path: '/notifications/inbox',
+            builder: (context, state) => const NotificationInboxPage(),
+          ),
+          GoRoute(
+            path: '/notifications/preferences',
+            builder: (context, state) => const NotificationPreferencesPage(),
+          ),
         ],
       ),
     ],
diff --git a/it0_app/lib/features/notifications/data/in_site_notification.dart b/it0_app/lib/features/notifications/data/in_site_notification.dart
new file mode 100644
index 0000000..b6ed185
--- /dev/null
+++ b/it0_app/lib/features/notifications/data/in_site_notification.dart
@@ -0,0 +1,90 @@
+/// In-site notification fetched from the notification-service backend.
+class InSiteNotification {
+  final String id;
+  final String title;
+  final String content;
+  final String type; // SYSTEM | MAINTENANCE | FEATURE | ANNOUNCEMENT | BILLING | SECURITY
+  final String priority; // LOW | NORMAL | HIGH | URGENT
+  final String? imageUrl;
+  final String? linkUrl;
+  final bool requiresForceRead;
+  final DateTime? publishedAt;
+  final bool isRead;
+
+  const InSiteNotification({
+    required this.id,
+    required this.title,
+    required this.content,
+    required this.type,
+    required this.priority,
+    this.imageUrl,
+    this.linkUrl,
+    required this.requiresForceRead,
+    this.publishedAt,
+    required this.isRead,
+  });
+
+  factory InSiteNotification.fromJson(Map<String, dynamic> json) {
+    return InSiteNotification(
+      id: json['id'] as String,
+      title: json['title'] as String? ?? '',
+      content: json['content'] as String? ?? '',
+      type: json['type'] as String? ?? 'ANNOUNCEMENT',
+      priority: json['priority'] as String? ?? 'NORMAL',
+      imageUrl: json['imageUrl'] as String?,
+      linkUrl: json['linkUrl'] as String?,
+      requiresForceRead: json['requiresForceRead'] as bool? ?? false,
+      publishedAt: json['publishedAt'] != null
+          ? DateTime.tryParse(json['publishedAt'] as String)
+          : null,
+      isRead: json['isRead'] as bool? ?? false,
+    );
+  }
+
+  InSiteNotification copyWith({bool? isRead}) => InSiteNotification(
+        id: id,
+        title: title,
+        content: content,
+        type: type,
+        priority: priority,
+        imageUrl: imageUrl,
+        linkUrl: linkUrl,
+        requiresForceRead: requiresForceRead,
+        publishedAt: publishedAt,
+        isRead: isRead ?? this.isRead,
+      );
+
+  String get typeLabel {
+    const labels = {
+      'SYSTEM': '系统通知',
+      'MAINTENANCE': '维护通知',
+      'FEATURE': '新功能',
+      'ANNOUNCEMENT': '公告',
+      'BILLING': '账单通知',
+      'SECURITY': '安全通知',
+    };
+    return labels[type] ?? type;
+  }
+
+  String get typeEmoji {
+    const emojis = {
+      'SYSTEM': '⚙️',
+      'MAINTENANCE': '🔧',
+      'FEATURE': '✨',
+      'ANNOUNCEMENT': '📢',
+      'BILLING': '💳',
+      'SECURITY': '🔒',
+    };
+    return emojis[type] ?? '📩';
+  }
+
+  String get relativeTime {
+    final ref = publishedAt ?? DateTime.now();
+    final diff = DateTime.now().difference(ref);
+    if (diff.inMinutes < 1) return '刚刚';
+    if (diff.inHours < 1) return '${diff.inMinutes}分钟前';
+    if (diff.inDays < 1) return '${diff.inHours}小时前';
+    if (diff.inDays < 30) return '${diff.inDays}天前';
+    return '${ref.year}-${ref.month.toString().padLeft(2, '0')}-${ref.day.toString().padLeft(2, '0')}';
+  }
+}
diff --git a/it0_app/lib/features/notifications/data/in_site_notification_repository.dart b/it0_app/lib/features/notifications/data/in_site_notification_repository.dart
new file mode 100644
index 0000000..668378c
--- /dev/null
+++ b/it0_app/lib/features/notifications/data/in_site_notification_repository.dart
@@ -0,0 +1,50 @@
+import 'package:dio/dio.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import '../../../core/network/dio_client.dart';
+import 'in_site_notification.dart';
+
+class InSiteNotificationRepository {
+  final Dio _dio;
+
+  InSiteNotificationRepository(this._dio);
+
+  Future<({List<InSiteNotification> items, int total})> getMyNotifications({
+    int limit = 50,
+    int offset = 0,
+  }) async {
+    final res = await _dio.get(
+      '/api/v1/notifications/me',
+      queryParameters: {'limit': limit, 'offset': offset},
+    );
+    final data = res.data as Map<String, dynamic>;
+    final items = (data['items'] as List)
+        .map((e) => InSiteNotification.fromJson(e as Map<String, dynamic>))
+        .toList();
+    return (items: items, total: data['total'] as int? ?? 0);
+  }
+
+  Future<int> getUnreadCount() async {
+    final res = await _dio.get('/api/v1/notifications/me/unread-count');
+    final data = res.data as Map<String, dynamic>;
+    return data['count'] as int? ?? 0;
+  }
+
+  Future<void> markRead(String notificationId) async {
+    await _dio.post(
+      '/api/v1/notifications/me/mark-read',
+      data: {'notificationId': notificationId},
+    );
+  }
+
+  Future<void> markAllRead() async {
+    await _dio.post('/api/v1/notifications/me/mark-read', data: {});
+  }
+}
+
+// ── Riverpod provider ──────────────────────────────────────────────────────
+
+final inSiteNotificationRepositoryProvider =
+    Provider<InSiteNotificationRepository>((ref) {
+  final dio = ref.watch(dioClientProvider).dio;
+  return InSiteNotificationRepository(dio);
+});
diff --git a/it0_app/lib/features/notifications/data/notification_channel.dart b/it0_app/lib/features/notifications/data/notification_channel.dart
new file mode 100644
index 0000000..85c19eb
--- /dev/null
+++ b/it0_app/lib/features/notifications/data/notification_channel.dart
@@ -0,0 +1,31 @@
+class NotificationChannelPreference {
+  final String channelKey;
+  final String channelName;
+  final bool isMandatory;
+  final bool enabled;
+
+  const NotificationChannelPreference({
+    required this.channelKey,
+    required this.channelName,
+    required this.isMandatory,
+    required this.enabled,
+  });
+
+  factory NotificationChannelPreference.fromJson(Map<String, dynamic> json) {
+    return NotificationChannelPreference(
+      channelKey: json['channelKey'] as String? ?? '',
+      channelName: json['channelName'] as String? ?? json['channelKey'] as String? ?? '',
+      isMandatory: json['isMandatory'] as bool? ?? false,
+      enabled: json['enabled'] as bool? ?? true,
+    );
+  }
+
+  NotificationChannelPreference copyWith({bool? enabled}) {
+    return NotificationChannelPreference(
+      channelKey: channelKey,
+      channelName: channelName,
+      isMandatory: isMandatory,
+      enabled: enabled ?? this.enabled,
+    );
+  }
+}
diff --git a/it0_app/lib/features/notifications/presentation/pages/notification_inbox_page.dart b/it0_app/lib/features/notifications/presentation/pages/notification_inbox_page.dart
new file mode 100644
index 0000000..b0f67c8
--- /dev/null
+++ b/it0_app/lib/features/notifications/presentation/pages/notification_inbox_page.dart
@@ -0,0 +1,364 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import '../../data/in_site_notification.dart';
+import '../../data/in_site_notification_repository.dart';
+import '../providers/notification_providers.dart';
+import '../widgets/force_read_notification_dialog.dart';
+
+// ── Color map by notification type ────────────────────────────────────────
+
+Color _typeColor(String type) {
+  return switch (type) {
+    'SYSTEM'       => Colors.grey,
+    'MAINTENANCE'  => Colors.orange,
+    'FEATURE'      => Colors.green,
+    'BILLING'      => Colors.purple,
+    'SECURITY'     => Colors.red,
+    _              => Colors.blue,  // ANNOUNCEMENT + default
+  };
+}
+
+// ── Inbox Page ─────────────────────────────────────────────────────────────
+
+class NotificationInboxPage extends ConsumerStatefulWidget {
+  const NotificationInboxPage({super.key});
+
+  @override
+  ConsumerState<NotificationInboxPage> createState() =>
+      _NotificationInboxPageState();
+}
+
+class _NotificationInboxPageState
+    extends ConsumerState<NotificationInboxPage> {
+  @override
+  void initState() {
+    super.initState();
+    // Show force-read dialogs after first frame
+    WidgetsBinding.instance.addPostFrameCallback((_) => _checkForceRead());
+  }
+
+  Future<void> _refresh() async {
+    ref.invalidate(inSiteNotificationsProvider);
+    ref.invalidate(inSiteUnreadCountProvider);
+  }
+
+  void _checkForceRead() {
+    final asyncVal = ref.read(inSiteNotificationsProvider);
+    asyncVal.whenData((items) {
+      final forceItems =
+          items.where((n) => n.requiresForceRead && !n.isRead).toList();
+      if (forceItems.isEmpty || !mounted) return;
+
+      showDialog(
+        context: context,
+        barrierDismissible: false,
+        builder: (_) => ForceReadNotificationDialog(
+          notifications: forceItems,
+          onMarkRead: (id) => ref
+              .read(inSiteNotificationRepositoryProvider)
+              .markRead(id),
+          onAllDone: _refresh,
+        ),
+      );
+    });
+  }
+
+  Future<void> _markAllRead() async {
+    try {
+      await ref
+          .read(inSiteNotificationRepositoryProvider)
+          .markAllRead();
+      await _refresh();
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          const SnackBar(content: Text('操作失败，请重试')),
+        );
+      }
+    }
+  }
+
+  Future<void> _markRead(InSiteNotification item) async {
+    if (item.isRead) return;
+    try {
+      await ref
+          .read(inSiteNotificationRepositoryProvider)
+          .markRead(item.id);
+      await _refresh();
+    } catch (_) {}
+  }
+
+  void _showDetail(InSiteNotification item) {
+    _markRead(item);
+    showModalBottomSheet(
+      context: context,
+      isScrollControlled: true,
+      shape: const RoundedRectangleBorder(
+        borderRadius: BorderRadius.vertical(top: Radius.circular(20)),
+      ),
+      builder: (ctx) => DraggableScrollableSheet(
+        expand: false,
+        initialChildSize: 0.6,
+        maxChildSize: 0.9,
+        builder: (_, controller) => ListView(
+          controller: controller,
+          padding: const EdgeInsets.fromLTRB(20, 16, 20, 32),
+          children: [
+            Center(
+              child: Container(
+                width: 40,
+                height: 4,
+                decoration: BoxDecoration(
+                  color: Colors.grey[400],
+                  borderRadius: BorderRadius.circular(2),
+                ),
+              ),
+            ),
+            const SizedBox(height: 16),
+            Row(
+              children: [
+                Container(
+                  padding: const EdgeInsets.symmetric(
+                      horizontal: 8, vertical: 3),
+                  decoration: BoxDecoration(
+                    color: _typeColor(item.type).withAlpha(30),
+                    borderRadius: BorderRadius.circular(4),
+                    border: Border.all(
+                        color: _typeColor(item.type).withAlpha(80)),
+                  ),
+                  child: Text(
+                    item.typeLabel,
+                    style: TextStyle(
+                      fontSize: 11,
+                      color: _typeColor(item.type),
+                      fontWeight: FontWeight.w500,
+                    ),
+                  ),
+                ),
+                const Spacer(),
+                Text(
+                  item.relativeTime,
+                  style: const TextStyle(
+                      fontSize: 12, color: Colors.grey),
+                ),
+              ],
+            ),
+            const SizedBox(height: 12),
+            Text(
+              item.title,
+              style: const TextStyle(
+                  fontSize: 18, fontWeight: FontWeight.bold),
+            ),
+            const SizedBox(height: 12),
+            const Divider(),
+            const SizedBox(height: 12),
+            Text(
+              item.content,
+              style: const TextStyle(fontSize: 15, height: 1.6),
+            ),
+            if (item.linkUrl != null) ...[
+              const SizedBox(height: 16),
+              Text(
+                '链接：${item.linkUrl}',
+                style: const TextStyle(
+                    fontSize: 13, color: Colors.blue),
+              ),
+            ],
+          ],
+        ),
+      ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final asyncItems = ref.watch(inSiteNotificationsProvider);
+    final hasUnread = asyncItems.whenOrNull(
+          data: (items) => items.any((n) => !n.isRead),
+        ) ??
+        false;
+
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('站内消息'),
+        actions: [
+          if (hasUnread)
+            TextButton(
+              onPressed: _markAllRead,
+              child: const Text('全部已读'),
+            ),
+        ],
+      ),
+      body: asyncItems.when(
+        loading: () =>
+            const Center(child: CircularProgressIndicator()),
+        error: (e, _) => Center(
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              const Icon(Icons.error_outline,
+                  size: 48, color: Colors.grey),
+              const SizedBox(height: 12),
+              Text('加载失败', style: TextStyle(color: Colors.grey[600])),
+              const SizedBox(height: 8),
+              TextButton(
+                  onPressed: _refresh, child: const Text('重试')),
+            ],
+          ),
+        ),
+        data: (items) {
+          if (items.isEmpty) {
+            return const Center(
+              child: Column(
+                mainAxisSize: MainAxisSize.min,
+                children: [
+                  Icon(Icons.notifications_none,
+                      size: 64, color: Colors.grey),
+                  SizedBox(height: 12),
+                  Text('暂无消息',
+                      style: TextStyle(color: Colors.grey)),
+                ],
+              ),
+            );
+          }
+
+          return RefreshIndicator(
+            onRefresh: _refresh,
+            child: ListView.separated(
+              itemCount: items.length,
+              separatorBuilder: (_, __) => const Divider(height: 1),
+              itemBuilder: (ctx, i) {
+                final item = items[i];
+                final color = _typeColor(item.type);
+                return InkWell(
+                  onTap: () => _showDetail(item),
+                  child: Container(
+                    decoration: BoxDecoration(
+                      border: Border(
+                        left: BorderSide(color: color, width: 3),
+                      ),
+                      color: item.isRead
+                          ? null
+                          : color.withAlpha(10),
+                    ),
+                    padding: const EdgeInsets.symmetric(
+                        horizontal: 16, vertical: 12),
+                    child: Row(
+                      crossAxisAlignment: CrossAxisAlignment.start,
+                      children: [
+                        // Emoji icon
+                        Container(
+                          width: 38,
+                          height: 38,
+                          decoration: BoxDecoration(
+                            color: color.withAlpha(20),
+                            borderRadius: BorderRadius.circular(10),
+                          ),
+                          child: Center(
+                            child: Text(item.typeEmoji,
+                                style: const TextStyle(fontSize: 18)),
+                          ),
+                        ),
+                        const SizedBox(width: 12),
+                        // Content
+                        Expanded(
+                          child: Column(
+                            crossAxisAlignment: CrossAxisAlignment.start,
+                            children: [
+                              Row(
+                                children: [
+                                  // Unread dot
+                                  if (!item.isRead) ...[
+                                    Container(
+                                      width: 7,
+                                      height: 7,
+                                      margin: const EdgeInsets.only(right: 6, top: 1),
+                                      decoration: BoxDecoration(
+                                        color: color,
+                                        shape: BoxShape.circle,
+                                      ),
+                                    ),
+                                  ],
+                                  Expanded(
+                                    child: Text(
+                                      item.title,
+                                      style: TextStyle(
+                                        fontWeight: item.isRead
+                                            ? FontWeight.normal
+                                            : FontWeight.w600,
+                                        fontSize: 14,
+                                      ),
+                                      maxLines: 1,
+                                      overflow: TextOverflow.ellipsis,
+                                    ),
+                                  ),
+                                  const SizedBox(width: 4),
+                                  Text(
+                                    item.relativeTime,
+                                    style: const TextStyle(
+                                        fontSize: 11,
+                                        color: Colors.grey),
+                                  ),
+                                ],
+                              ),
+                              const SizedBox(height: 4),
+                              Text(
+                                item.content,
+                                style: const TextStyle(
+                                    fontSize: 12, color: Colors.grey),
+                                maxLines: 2,
+                                overflow: TextOverflow.ellipsis,
+                              ),
+                              const SizedBox(height: 4),
+                              Row(
+                                children: [
+                                  Container(
+                                    padding: const EdgeInsets.symmetric(
+                                        horizontal: 6, vertical: 2),
+                                    decoration: BoxDecoration(
+                                      color: color.withAlpha(20),
+                                      borderRadius: BorderRadius.circular(3),
+                                    ),
+                                    child: Text(
+                                      item.typeLabel,
+                                      style: TextStyle(
+                                          fontSize: 10, color: color),
+                                    ),
+                                  ),
+                                  if (item.requiresForceRead) ...[
+                                    const SizedBox(width: 4),
+                                    Container(
+                                      padding: const EdgeInsets.symmetric(
+                                          horizontal: 6, vertical: 2),
+                                      decoration: BoxDecoration(
+                                        color: Colors.red.withAlpha(20),
+                                        borderRadius:
+                                            BorderRadius.circular(3),
+                                      ),
+                                      child: const Text(
+                                        '强制阅读',
+                                        style: TextStyle(
+                                            fontSize: 10,
+                                            color: Colors.red),
+                                      ),
+                                    ),
+                                  ],
+                                ],
+                              ),
+                            ],
+                          ),
+                        ),
+                        const Icon(Icons.chevron_right,
+                            size: 16, color: Colors.grey),
+                      ],
+                    ),
+                  ),
+                );
+              },
+            ),
+          );
+        },
+      ),
+    );
+  }
+}
diff --git a/it0_app/lib/features/notifications/presentation/pages/notification_preferences_page.dart b/it0_app/lib/features/notifications/presentation/pages/notification_preferences_page.dart
new file mode 100644
index 0000000..8452913
--- /dev/null
+++ b/it0_app/lib/features/notifications/presentation/pages/notification_preferences_page.dart
@@ -0,0 +1,241 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import '../../data/notification_channel.dart';
+import '../../../../core/network/dio_client.dart';
+
+// ── Providers ──────────────────────────────────────────────────────────────
+
+final _channelPrefsProvider = FutureProvider.autoDispose<List<NotificationChannelPreference>>((ref) async {
+  final dio = ref.watch(dioClientProvider).dio;
+  final res = await dio.get('/api/v1/notifications/channels/me/preferences');
+  final list = res.data as List;
+  return list
+      .map((e) => NotificationChannelPreference.fromJson(e as Map<String, dynamic>))
+      .toList();
+});
+
+// ── Page ───────────────────────────────────────────────────────────────────
+
+class NotificationPreferencesPage extends ConsumerStatefulWidget {
+  const NotificationPreferencesPage({super.key});
+
+  @override
+  ConsumerState<NotificationPreferencesPage> createState() => _NotificationPreferencesPageState();
+}
+
+class _NotificationPreferencesPageState extends ConsumerState<NotificationPreferencesPage> {
+  final Map<String, bool> _pendingChanges = {};
+  bool _saving = false;
+
+  Future<void> _saveChanges() async {
+    if (_pendingChanges.isEmpty) return;
+    setState(() => _saving = true);
+    try {
+      final dio = ref.read(dioClientProvider).dio;
+      final preferences = _pendingChanges.entries
+          .map((e) => {'channelKey': e.key, 'enabled': e.value})
+          .toList();
+      await dio.put(
+        '/api/v1/notifications/channels/me/preferences',
+        data: {'preferences': preferences},
+      );
+      _pendingChanges.clear();
+      ref.invalidate(_channelPrefsProvider);
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          const SnackBar(content: Text('通知偏好已保存'), duration: Duration(seconds: 2)),
+        );
+      }
+    } catch (e) {
+      if (mounted) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('保存失败: $e'), backgroundColor: Colors.red),
+        );
+      }
+    } finally {
+      if (mounted) setState(() => _saving = false);
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final prefsAsync = ref.watch(_channelPrefsProvider);
+    final theme = Theme.of(context);
+
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('通知偏好设置'),
+        actions: [
+          if (_pendingChanges.isNotEmpty)
+            TextButton(
+              onPressed: _saving ? null : _saveChanges,
+              child: _saving
+                  ? const SizedBox(width: 16, height: 16, child: CircularProgressIndicator(strokeWidth: 2))
+                  : const Text('保存'),
+            ),
+        ],
+      ),
+      body: prefsAsync.when(
+        loading: () => const Center(child: CircularProgressIndicator()),
+        error: (e, _) => Center(
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              Text('加载失败', style: theme.textTheme.titleMedium),
+              const SizedBox(height: 8),
+              TextButton(
+                onPressed: () => ref.invalidate(_channelPrefsProvider),
+                child: const Text('重试'),
+              ),
+            ],
+          ),
+        ),
+        data: (prefs) {
+          if (prefs.isEmpty) {
+            return const Center(child: Text('暂无可配置的通知频道'));
+          }
+
+          final mandatory = prefs.where((p) => p.isMandatory).toList();
+          final optional = prefs.where((p) => !p.isMandatory).toList();
+
+          return ListView(
+            children: [
+              // Info banner
+              Container(
+                margin: const EdgeInsets.all(16),
+                padding: const EdgeInsets.all(12),
+                decoration: BoxDecoration(
+                  color: theme.colorScheme.primaryContainer.withOpacity(0.3),
+                  borderRadius: BorderRadius.circular(12),
+                ),
+                child: Row(
+                  children: [
+                    Icon(Icons.info_outline, size: 16, color: theme.colorScheme.primary),
+                    const SizedBox(width: 8),
+                    Expanded(
+                      child: Text(
+                        '您可以选择接收哪些类型的通知。强制通知（如安全告警）无法关闭。',
+                        style: theme.textTheme.bodySmall?.copyWith(
+                          color: theme.colorScheme.onSurface.withOpacity(0.7),
+                        ),
+                      ),
+                    ),
+                  ],
+                ),
+              ),
+
+              // Mandatory channels
+              if (mandatory.isNotEmpty) ...[
+                Padding(
+                  padding: const EdgeInsets.fromLTRB(16, 8, 16, 4),
+                  child: Text(
+                    '重要通知（不可关闭）',
+                    style: theme.textTheme.labelSmall?.copyWith(
+                      color: theme.colorScheme.onSurface.withOpacity(0.5),
+                      letterSpacing: 0.5,
+                    ),
+                  ),
+                ),
+                ...mandatory.map((pref) => _ChannelTile(
+                  pref: pref,
+                  currentValue: _pendingChanges[pref.channelKey] ?? pref.enabled,
+                  onChanged: null, // mandatory — disabled
+                )),
+              ],
+
+              // Optional channels
+              if (optional.isNotEmpty) ...[
+                Padding(
+                  padding: const EdgeInsets.fromLTRB(16, 16, 16, 4),
+                  child: Text(
+                    '可选通知',
+                    style: theme.textTheme.labelSmall?.copyWith(
+                      color: theme.colorScheme.onSurface.withOpacity(0.5),
+                      letterSpacing: 0.5,
+                    ),
+                  ),
+                ),
+                ...optional.map((pref) => _ChannelTile(
+                  pref: pref,
+                  currentValue: _pendingChanges[pref.channelKey] ?? pref.enabled,
+                  onChanged: (val) {
+                    setState(() {
+                      _pendingChanges[pref.channelKey] = val;
+                    });
+                  },
+                )),
+              ],
+
+              const SizedBox(height: 32),
+
+              // Save button at bottom
+              if (_pendingChanges.isNotEmpty)
+                Padding(
+                  padding: const EdgeInsets.symmetric(horizontal: 16),
+                  child: FilledButton(
+                    onPressed: _saving ? null : _saveChanges,
+                    child: _saving
+                        ? const SizedBox(
+                            width: 20, height: 20,
+                            child: CircularProgressIndicator(strokeWidth: 2, color: Colors.white),
+                          )
+                        : const Text('保存偏好设置'),
+                  ),
+                ),
+            ],
+          );
+        },
+      ),
+    );
+  }
+}
+
+class _ChannelTile extends StatelessWidget {
+  final NotificationChannelPreference pref;
+  final bool currentValue;
+  final ValueChanged<bool>? onChanged;
+
+  const _ChannelTile({
+    required this.pref,
+    required this.currentValue,
+    required this.onChanged,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    return SwitchListTile(
+      title: Row(
+        children: [
+          Text(pref.channelName),
+          if (pref.isMandatory) ...[
+            const SizedBox(width: 6),
+            Container(
+              padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 2),
+              decoration: BoxDecoration(
+                color: Colors.amber.shade100,
+                borderRadius: BorderRadius.circular(4),
+              ),
+              child: Text(
+                '必需',
+                style: theme.textTheme.labelSmall?.copyWith(
+                  color: Colors.amber.shade800,
+                  fontWeight: FontWeight.w600,
+                ),
+              ),
+            ),
+          ],
+        ],
+      ),
+      subtitle: Text(
+        pref.channelKey,
+        style: theme.textTheme.bodySmall?.copyWith(
+          color: theme.colorScheme.onSurface.withOpacity(0.4),
+          fontFamily: 'monospace',
+        ),
+      ),
+      value: currentValue,
+      onChanged: onChanged,
+    );
+  }
+}
diff --git a/it0_app/lib/features/notifications/presentation/providers/notification_providers.dart b/it0_app/lib/features/notifications/presentation/providers/notification_providers.dart
index f29736c..df0398e 100644
--- a/it0_app/lib/features/notifications/presentation/providers/notification_providers.dart
+++ b/it0_app/lib/features/notifications/presentation/providers/notification_providers.dart
@@ -3,6 +3,8 @@ import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../../../core/config/app_config.dart';
 import '../../../../core/services/notification_service.dart';
 import '../../domain/entities/app_notification.dart';
+import '../../data/in_site_notification.dart';
+import '../../data/in_site_notification_repository.dart';
 
 /// Global local notifications plugin instance (initialized in main.dart).
 final localNotificationsPluginProvider =
@@ -20,7 +22,7 @@ final notificationServiceProvider = Provider<NotificationService>((ref) {
   );
 });
 
-/// Accumulated notification list.
+/// Accumulated push notification list (local/realtime).
 class NotificationListNotifier extends StateNotifier<List<AppNotification>> {
   NotificationListNotifier() : super([]);
 
@@ -50,8 +52,39 @@ final notificationListProvider =
   return NotificationListNotifier();
 });
 
-/// Unread notification count.
+/// Local push notification unread count.
 final unreadNotificationCountProvider = Provider<int>((ref) {
   final notifications = ref.watch(notificationListProvider);
   return notifications.where((n) => !n.isRead).length;
 });
+
+// ── In-site (站内消息) notification providers ──────────────────────────────
+
+/// Polls the backend every 30s for the unread in-site notification count.
+final inSiteUnreadCountProvider = StreamProvider<int>((ref) async* {
+  final repo = ref.watch(inSiteNotificationRepositoryProvider);
+
+  Future<int> fetch() async {
+    try {
+      return await repo.getUnreadCount();
+    } catch (_) {
+      return 0;
+    }
+  }
+
+  // Emit immediately on first build
+  yield await fetch();
+
+  // Then poll every 30s
+  await for (final _ in Stream.periodic(const Duration(seconds: 30))) {
+    yield await fetch();
+  }
+});
+
+/// Fetches the full in-site notification list (on demand, refreshed when invalidated).
+final inSiteNotificationsProvider =
+    FutureProvider<List<InSiteNotification>>((ref) async {
+  final repo = ref.watch(inSiteNotificationRepositoryProvider);
+  final result = await repo.getMyNotifications(limit: 100);
+  return result.items;
+});
diff --git a/it0_app/lib/features/notifications/presentation/widgets/force_read_notification_dialog.dart b/it0_app/lib/features/notifications/presentation/widgets/force_read_notification_dialog.dart
new file mode 100644
index 0000000..ed5e62a
--- /dev/null
+++ b/it0_app/lib/features/notifications/presentation/widgets/force_read_notification_dialog.dart
@@ -0,0 +1,179 @@
+import 'package:flutter/material.dart';
+import '../../data/in_site_notification.dart';
+
+/// Non-dismissible dialog shown for notifications with requiresForceRead=true.
+/// Displays notifications sequentially; last one requires checkbox acknowledgement.
+class ForceReadNotificationDialog extends StatefulWidget {
+  final List<InSiteNotification> notifications;
+  final Future<void> Function(String notificationId) onMarkRead;
+  final VoidCallback onAllDone;
+
+  const ForceReadNotificationDialog({
+    super.key,
+    required this.notifications,
+    required this.onMarkRead,
+    required this.onAllDone,
+  });
+
+  @override
+  State<ForceReadNotificationDialog> createState() =>
+      _ForceReadNotificationDialogState();
+}
+
+class _ForceReadNotificationDialogState
+    extends State<ForceReadNotificationDialog> {
+  int _current = 0;
+  bool _acknowledged = false;
+  bool _loading = false;
+
+  bool get _isLast => _current == widget.notifications.length - 1;
+  InSiteNotification get _item => widget.notifications[_current];
+
+  Future<void> _next() async {
+    setState(() => _loading = true);
+    try {
+      await widget.onMarkRead(_item.id);
+    } catch (_) {}
+    setState(() {
+      _current++;
+      _acknowledged = false;
+      _loading = false;
+    });
+  }
+
+  Future<void> _confirm() async {
+    setState(() => _loading = true);
+    try {
+      await widget.onMarkRead(_item.id);
+    } catch (_) {}
+    if (mounted) Navigator.of(context).pop();
+    widget.onAllDone();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final colorScheme = Theme.of(context).colorScheme;
+
+    return PopScope(
+      canPop: false,
+      child: AlertDialog(
+        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
+        title: Row(
+          children: [
+            Expanded(
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  Row(
+                    children: [
+                      const Icon(Icons.priority_high, color: Colors.red, size: 18),
+                      const SizedBox(width: 4),
+                      Text(
+                        '重要通知',
+                        style: TextStyle(
+                          fontSize: 11,
+                          color: Colors.red[700],
+                          fontWeight: FontWeight.w500,
+                        ),
+                      ),
+                      const Spacer(),
+                      Text(
+                        '${_current + 1}/${widget.notifications.length}',
+                        style: TextStyle(
+                          fontSize: 12,
+                          color: Colors.grey[500],
+                          fontWeight: FontWeight.normal,
+                        ),
+                      ),
+                    ],
+                  ),
+                  const SizedBox(height: 4),
+                  Text(
+                    _item.title,
+                    style: const TextStyle(fontSize: 16, fontWeight: FontWeight.bold),
+                  ),
+                ],
+              ),
+            ),
+          ],
+        ),
+        content: SingleChildScrollView(
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            mainAxisSize: MainAxisSize.min,
+            children: [
+              // Type badge
+              Container(
+                padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
+                decoration: BoxDecoration(
+                  color: colorScheme.primaryContainer,
+                  borderRadius: BorderRadius.circular(4),
+                ),
+                child: Text(
+                  _item.typeLabel,
+                  style: TextStyle(
+                    fontSize: 11,
+                    color: colorScheme.onPrimaryContainer,
+                    fontWeight: FontWeight.w500,
+                  ),
+                ),
+              ),
+              const SizedBox(height: 12),
+              // Content
+              Text(_item.content, style: const TextStyle(fontSize: 14, height: 1.5)),
+              // Acknowledgement checkbox on last notification
+              if (_isLast) ...[
+                const SizedBox(height: 20),
+                const Divider(),
+                GestureDetector(
+                  onTap: () => setState(() => _acknowledged = !_acknowledged),
+                  child: Row(
+                    crossAxisAlignment: CrossAxisAlignment.center,
+                    children: [
+                      Checkbox(
+                        value: _acknowledged,
+                        onChanged: (v) =>
+                            setState(() => _acknowledged = v ?? false),
+                      ),
+                      const Expanded(
+                        child: Text(
+                          '我已阅读并确认以上内容',
+                          style: TextStyle(fontSize: 13),
+                        ),
+                      ),
+                    ],
+                  ),
+                ),
+              ],
+            ],
+          ),
+        ),
+        actions: [
+          if (!_isLast)
+            TextButton(
+              onPressed: _loading ? null : _next,
+              child: _loading
+                  ? const SizedBox(
+                      width: 16,
+                      height: 16,
+                      child: CircularProgressIndicator(strokeWidth: 2),
+                    )
+                  : const Text('下一条'),
+            )
+          else
+            FilledButton(
+              onPressed: (_acknowledged && !_loading) ? _confirm : null,
+              child: _loading
+                  ? const SizedBox(
+                      width: 16,
+                      height: 16,
+                      child: CircularProgressIndicator(
+                          strokeWidth: 2, color: Colors.white),
+                    )
+                  : const Text('确认已读'),
+            ),
+        ],
+      ),
+    );
+  }
+}
diff --git a/it0_app/lib/features/profile/presentation/pages/profile_page.dart b/it0_app/lib/features/profile/presentation/pages/profile_page.dart
index 289a715..90cf33c 100644
--- a/it0_app/lib/features/profile/presentation/pages/profile_page.dart
+++ b/it0_app/lib/features/profile/presentation/pages/profile_page.dart
@@ -7,6 +7,7 @@ import '../../../../core/updater/update_service.dart';
 import '../../../auth/data/providers/auth_provider.dart';
 import '../../../agent_call/presentation/pages/voice_test_page.dart';
 import '../../../settings/presentation/providers/settings_providers.dart';
+import '../../../notifications/presentation/providers/notification_providers.dart';
 
 // ---------------------------------------------------------------------------
 // Profile page — "我" Tab
@@ -85,6 +86,14 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
                 ),
                 onTap: () => context.push('/referral'),
               ),
+              _InSiteMessageRow(subtitleColor: subtitleColor),
+              _SettingsRow(
+                icon: Icons.tune_outlined,
+                label: '通知偏好设置',
+                subtitle: '管理各类通知的订阅开关',
+                subtitleColor: subtitleColor,
+                onTap: () => context.push('/notifications/preferences'),
+              ),
             ],
           ),
           const SizedBox(height: 20),
@@ -956,6 +965,59 @@ class _ThemeLabel extends StatelessWidget {
   }
 }
 
+/// In-site message row with unread badge.
+class _InSiteMessageRow extends ConsumerWidget {
+  final Color? subtitleColor;
+  const _InSiteMessageRow({this.subtitleColor});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final unreadAsync = ref.watch(inSiteUnreadCountProvider);
+    final unread = unreadAsync.valueOrNull ?? 0;
+
+    return ListTile(
+      leading: Container(
+        width: 32,
+        height: 32,
+        decoration: BoxDecoration(
+          color: const Color(0xFFEF4444),
+          borderRadius: BorderRadius.circular(8),
+        ),
+        child: const Icon(Icons.notifications_outlined,
+            color: Colors.white, size: 18),
+      ),
+      title: const Text('站内消息'),
+      trailing: Row(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          if (unread > 0)
+            Container(
+              padding: const EdgeInsets.symmetric(horizontal: 7, vertical: 2),
+              decoration: BoxDecoration(
+                color: const Color(0xFFEF4444),
+                borderRadius: BorderRadius.circular(10),
+              ),
+              child: Text(
+                unread > 99 ? '99+' : '$unread',
+                style: const TextStyle(
+                    fontSize: 11,
+                    color: Colors.white,
+                    fontWeight: FontWeight.bold),
+              ),
+            )
+          else
+            Text('查看消息',
+                style: TextStyle(color: subtitleColor, fontSize: 14)),
+          const SizedBox(width: 4),
+          Icon(Icons.chevron_right,
+              size: 20, color: Theme.of(context).hintColor),
+        ],
+      ),
+      onTap: () => context.push('/notifications/inbox'),
+    );
+  }
+}
+
 class _ThemeOption extends StatelessWidget {
   final IconData icon;
   final String label;
diff --git a/packages/gateway/config/kong.yml b/packages/gateway/config/kong.yml
index c7af79e..2df5073 100644
--- a/packages/gateway/config/kong.yml
+++ b/packages/gateway/config/kong.yml
@@ -172,6 +172,35 @@ services:
           - /api/v1/referral/validate
         strip_path: false
 
+  - name: notification-service
+    url: http://notification-service:3013
+    routes:
+      # User-facing: GET /api/v1/notifications/me, /me/unread-count; POST /me/mark-read
+      - name: notification-user-routes
+        paths:
+          - /api/v1/notifications/me
+        strip_path: false
+      # Admin: /api/v1/notifications/admin (JWT + platform_admin role enforced in service)
+      - name: notification-admin-routes
+        paths:
+          - /api/v1/notifications/admin
+        strip_path: false
+      # Channels: admin CRUD + user preferences (JWT enforced)
+      - name: notification-channel-routes
+        paths:
+          - /api/v1/notifications/channels
+        strip_path: false
+      # Campaigns: admin CRUD + scheduling + analytics
+      - name: notification-campaign-routes
+        paths:
+          - /api/v1/notifications/campaigns
+        strip_path: false
+      # Segments: admin audience group management
+      - name: notification-segment-routes
+        paths:
+          - /api/v1/notifications/segments
+        strip_path: false
+
 plugins:
   # ===== Global plugins (apply to ALL routes) =====
   - name: cors
@@ -306,6 +335,42 @@ plugins:
       claims_to_verify:
         - exp
 
+  # JWT for notification-service (role enforcement done in service)
+  - name: jwt
+    route: notification-user-routes
+    config:
+      key_claim_name: kid
+      claims_to_verify:
+        - exp
+
+  - name: jwt
+    route: notification-admin-routes
+    config:
+      key_claim_name: kid
+      claims_to_verify:
+        - exp
+
+  - name: jwt
+    route: notification-channel-routes
+    config:
+      key_claim_name: kid
+      claims_to_verify:
+        - exp
+
+  - name: jwt
+    route: notification-campaign-routes
+    config:
+      key_claim_name: kid
+      claims_to_verify:
+        - exp
+
+  - name: jwt
+    route: notification-segment-routes
+    config:
+      key_claim_name: kid
+      claims_to_verify:
+        - exp
+
   # ===== Route-specific overrides =====
   - name: rate-limiting
     route: agent-ws
diff --git a/packages/services/auth-service/src/auth.module.ts b/packages/services/auth-service/src/auth.module.ts
index e0676d3..7da080e 100644
--- a/packages/services/auth-service/src/auth.module.ts
+++ b/packages/services/auth-service/src/auth.module.ts
@@ -11,6 +11,7 @@ import { SettingsController } from './interfaces/rest/controllers/settings.contr
 import { RoleController } from './interfaces/rest/controllers/role.controller';
 import { PermissionController } from './interfaces/rest/controllers/permission.controller';
 import { SmsController } from './interfaces/rest/controllers/sms.controller';
+import { TenantTagController } from './interfaces/rest/controllers/tenant-tag.controller';
 import { JwtStrategy } from './infrastructure/strategies/jwt.strategy';
 import { RbacGuard } from './infrastructure/guards/rbac.guard';
 import { AuthService } from './application/services/auth.service';
@@ -23,12 +24,14 @@ import { Role } from './domain/entities/role.entity';
 import { ApiKey } from './domain/entities/api-key.entity';
 import { Tenant } from './domain/entities/tenant.entity';
 import { TenantInvite } from './domain/entities/tenant-invite.entity';
+import { TenantTag } from './domain/entities/tenant-tag.entity';
+import { TenantTagAssignment } from './domain/entities/tenant-tag-assignment.entity';
 
 @Module({
   imports: [
     ConfigModule.forRoot({ isGlobal: true }),
     DatabaseModule.forRoot(),
-    TypeOrmModule.forFeature([User, Role, ApiKey, Tenant, TenantInvite]),
+    TypeOrmModule.forFeature([User, Role, ApiKey, Tenant, TenantInvite, TenantTag, TenantTagAssignment]),
     PassportModule.register({ defaultStrategy: 'jwt' }),
     JwtModule.registerAsync({
       useFactory: () => ({
@@ -37,7 +40,7 @@ import { TenantInvite } from './domain/entities/tenant-invite.entity';
       }),
     }),
   ],
-  controllers: [AuthController, TenantController, UserController, SettingsController, RoleController, PermissionController, SmsController],
+  controllers: [AuthController, TenantController, UserController, SettingsController, RoleController, PermissionController, SmsController, TenantTagController],
   providers: [
     JwtStrategy,
     RbacGuard,
diff --git a/packages/services/auth-service/src/domain/entities/tenant-tag-assignment.entity.ts b/packages/services/auth-service/src/domain/entities/tenant-tag-assignment.entity.ts
new file mode 100644
index 0000000..542e33b
--- /dev/null
+++ b/packages/services/auth-service/src/domain/entities/tenant-tag-assignment.entity.ts
@@ -0,0 +1,16 @@
+import { Entity, Column, PrimaryColumn, CreateDateColumn } from 'typeorm';
+
+@Entity({ name: 'tenant_tag_assignments', schema: 'public' })
+export class TenantTagAssignment {
+  @PrimaryColumn({ name: 'tenant_id', type: 'varchar', length: 100 })
+  tenantId!: string;
+
+  @PrimaryColumn({ name: 'tag_id', type: 'uuid' })
+  tagId!: string;
+
+  @Column({ name: 'tagged_by', type: 'varchar', length: 100, nullable: true })
+  taggedBy!: string | null;
+
+  @CreateDateColumn({ name: 'tagged_at', type: 'timestamptz' })
+  taggedAt!: Date;
+}
diff --git a/packages/services/auth-service/src/domain/entities/tenant-tag.entity.ts b/packages/services/auth-service/src/domain/entities/tenant-tag.entity.ts
new file mode 100644
index 0000000..4f277f7
--- /dev/null
+++ b/packages/services/auth-service/src/domain/entities/tenant-tag.entity.ts
@@ -0,0 +1,25 @@
+import { Entity, PrimaryGeneratedColumn, Column, CreateDateColumn, UpdateDateColumn } from 'typeorm';
+
+@Entity({ name: 'tenant_tags', schema: 'public' })
+export class TenantTag {
+  @PrimaryGeneratedColumn('uuid')
+  id!: string;
+
+  @Column({ type: 'varchar', length: 50, unique: true })
+  name!: string;
+
+  @Column({ type: 'varchar', length: 20, default: '#6366F1' })
+  color!: string;
+
+  @Column({ type: 'text', nullable: true })
+  description!: string | null;
+
+  @Column({ name: 'created_by', type: 'varchar', length: 100, nullable: true })
+  createdBy!: string | null;
+
+  @CreateDateColumn({ name: 'created_at', type: 'timestamptz' })
+  createdAt!: Date;
+
+  @UpdateDateColumn({ name: 'updated_at', type: 'timestamptz' })
+  updatedAt!: Date;
+}
diff --git a/packages/services/auth-service/src/interfaces/rest/controllers/tenant-tag.controller.ts b/packages/services/auth-service/src/interfaces/rest/controllers/tenant-tag.controller.ts
new file mode 100644
index 0000000..ed76be9
--- /dev/null
+++ b/packages/services/auth-service/src/interfaces/rest/controllers/tenant-tag.controller.ts
@@ -0,0 +1,194 @@
+import {
+  Controller,
+  Get,
+  Post,
+  Put,
+  Delete,
+  Param,
+  Body,
+  Query,
+  UseGuards,
+  Request,
+  HttpCode,
+  HttpStatus,
+  NotFoundException,
+  ConflictException,
+} from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository, DataSource } from 'typeorm';
+import { RolesGuard, Roles } from '@it0/common';
+import { TenantTag } from '../../../domain/entities/tenant-tag.entity';
+import { TenantTagAssignment } from '../../../domain/entities/tenant-tag-assignment.entity';
+
+/**
+ * Platform admin API for managing tenant tags.
+ * Tags can be created, applied to tenants, and used as notification targeting criteria.
+ */
+@Controller('api/v1/admin/tenant-tags')
+@UseGuards(RolesGuard)
+export class TenantTagController {
+  constructor(
+    @InjectRepository(TenantTag)
+    private readonly tagRepo: Repository<TenantTag>,
+    @InjectRepository(TenantTagAssignment)
+    private readonly assignRepo: Repository<TenantTagAssignment>,
+    private readonly dataSource: DataSource,
+  ) {}
+
+  // ── Tag CRUD ──────────────────────────────────────────────────────────────
+
+  /** GET /api/v1/admin/tenant-tags — list all tags with tenant counts */
+  @Get()
+  @Roles('platform_admin', 'platform_super_admin')
+  async listTags() {
+    const tags = await this.tagRepo.find({ order: { createdAt: 'DESC' } });
+    // Get tenant counts per tag
+    const counts = await this.dataSource.query(
+      `SELECT tag_id, COUNT(*)::int AS cnt
+       FROM public.tenant_tag_assignments
+       GROUP BY tag_id`,
+    );
+    const countMap = Object.fromEntries(counts.map((r: any) => [r.tag_id, r.cnt]));
+    return tags.map((t) => ({ ...t, tenantCount: countMap[t.id] ?? 0 }));
+  }
+
+  /** POST /api/v1/admin/tenant-tags — create a tag */
+  @Post()
+  @Roles('platform_admin', 'platform_super_admin')
+  async createTag(@Body() body: { name: string; color?: string; description?: string }, @Request() req: any) {
+    const existing = await this.tagRepo.findOne({ where: { name: body.name } });
+    if (existing) throw new ConflictException(`Tag "${body.name}" already exists`);
+
+    const tag = this.tagRepo.create({
+      name: body.name.trim(),
+      color: body.color ?? '#6366F1',
+      description: body.description ?? null,
+      createdBy: req.user?.id ?? null,
+    });
+    return this.tagRepo.save(tag);
+  }
+
+  /** PUT /api/v1/admin/tenant-tags/:id — update a tag */
+  @Put(':id')
+  @Roles('platform_admin', 'platform_super_admin')
+  async updateTag(@Param('id') id: string, @Body() body: { name?: string; color?: string; description?: string }) {
+    const tag = await this.tagRepo.findOne({ where: { id } });
+    if (!tag) throw new NotFoundException('Tag not found');
+    if (body.name !== undefined) tag.name = body.name.trim();
+    if (body.color !== undefined) tag.color = body.color;
+    if (body.description !== undefined) tag.description = body.description;
+    return this.tagRepo.save(tag);
+  }
+
+  /** DELETE /api/v1/admin/tenant-tags/:id — delete a tag (removes all assignments) */
+  @Delete(':id')
+  @HttpCode(HttpStatus.NO_CONTENT)
+  @Roles('platform_admin', 'platform_super_admin')
+  async deleteTag(@Param('id') id: string) {
+    const tag = await this.tagRepo.findOne({ where: { id } });
+    if (!tag) throw new NotFoundException('Tag not found');
+    await this.tagRepo.remove(tag);
+  }
+
+  // ── Tag Assignments ───────────────────────────────────────────────────────
+
+  /** GET /api/v1/admin/tenant-tags/tenants/:tenantId — get tags of a tenant */
+  @Get('tenants/:tenantId')
+  @Roles('platform_admin', 'platform_super_admin')
+  async getTagsForTenant(@Param('tenantId') tenantId: string) {
+    const rows = await this.dataSource.query(
+      `SELECT t.*, a.tagged_by, a.tagged_at
+       FROM public.tenant_tags t
+       JOIN public.tenant_tag_assignments a ON a.tag_id = t.id
+       WHERE a.tenant_id = $1
+       ORDER BY a.tagged_at DESC`,
+      [tenantId],
+    );
+    return rows;
+  }
+
+  /** GET /api/v1/admin/tenant-tags/:id/tenants — get tenants with a given tag */
+  @Get(':id/tenants')
+  @Roles('platform_admin', 'platform_super_admin')
+  async getTenantsForTag(
+    @Param('id') tagId: string,
+    @Query('limit') limit = '100',
+    @Query('offset') offset = '0',
+  ) {
+    const tag = await this.tagRepo.findOne({ where: { id: tagId } });
+    if (!tag) throw new NotFoundException('Tag not found');
+
+    const [rows, count] = await Promise.all([
+      this.dataSource.query(
+        `SELECT t.id, t.name, t.slug, t.plan, t.status, a.tagged_at
+         FROM public.tenants t
+         JOIN public.tenant_tag_assignments a ON a.tenant_id = t.id
+         WHERE a.tag_id = $1
+         ORDER BY a.tagged_at DESC
+         LIMIT $2 OFFSET $3`,
+        [tagId, parseInt(limit), parseInt(offset)],
+      ),
+      this.dataSource.query(
+        `SELECT COUNT(*)::int AS total FROM public.tenant_tag_assignments WHERE tag_id = $1`,
+        [tagId],
+      ),
+    ]);
+    return { items: rows, total: count[0]?.total ?? 0 };
+  }
+
+  /** POST /api/v1/admin/tenant-tags/:id/assign — assign tag to tenants */
+  @Post(':id/assign')
+  @Roles('platform_admin', 'platform_super_admin')
+  async assignTag(
+    @Param('id') tagId: string,
+    @Body() body: { tenantIds: string[] },
+    @Request() req: any,
+  ) {
+    const tag = await this.tagRepo.findOne({ where: { id: tagId } });
+    if (!tag) throw new NotFoundException('Tag not found');
+
+    for (const tenantId of body.tenantIds ?? []) {
+      await this.dataSource.query(
+        `INSERT INTO public.tenant_tag_assignments (tenant_id, tag_id, tagged_by)
+         VALUES ($1, $2, $3) ON CONFLICT DO NOTHING`,
+        [tenantId, tagId, req.user?.id ?? null],
+      );
+    }
+    return { ok: true, assigned: body.tenantIds?.length ?? 0 };
+  }
+
+  /** DELETE /api/v1/admin/tenant-tags/:id/assign/:tenantId — remove tag from tenant */
+  @Delete(':id/assign/:tenantId')
+  @HttpCode(HttpStatus.NO_CONTENT)
+  @Roles('platform_admin', 'platform_super_admin')
+  async removeAssignment(@Param('id') tagId: string, @Param('tenantId') tenantId: string) {
+    await this.dataSource.query(
+      `DELETE FROM public.tenant_tag_assignments WHERE tag_id = $1 AND tenant_id = $2`,
+      [tagId, tenantId],
+    );
+  }
+
+  /** POST /api/v1/admin/tenant-tags/tenants/:tenantId/tags — set all tags for a tenant */
+  @Post('tenants/:tenantId/tags')
+  @Roles('platform_admin', 'platform_super_admin')
+  async setTenantTags(
+    @Param('tenantId') tenantId: string,
+    @Body() body: { tagIds: string[] },
+    @Request() req: any,
+  ) {
+    // Remove existing assignments
+    await this.dataSource.query(
+      `DELETE FROM public.tenant_tag_assignments WHERE tenant_id = $1`,
+      [tenantId],
+    );
+    // Insert new assignments
+    for (const tagId of body.tagIds ?? []) {
+      await this.dataSource.query(
+        `INSERT INTO public.tenant_tag_assignments (tenant_id, tag_id, tagged_by)
+         VALUES ($1, $2, $3) ON CONFLICT DO NOTHING`,
+        [tenantId, tagId, req.user?.id ?? null],
+      );
+    }
+    return { ok: true };
+  }
+}
diff --git a/packages/services/notification-service/package.json b/packages/services/notification-service/package.json
new file mode 100644
index 0000000..c32cb48
--- /dev/null
+++ b/packages/services/notification-service/package.json
@@ -0,0 +1,31 @@
+{
+  "name": "@it0/notification-service",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "build": "nest build",
+    "dev": "nest start --watch",
+    "start": "node dist/main",
+    "test": "jest"
+  },
+  "dependencies": {
+    "@nestjs/common": "^10.3.0",
+    "@nestjs/core": "^10.3.0",
+    "@nestjs/config": "^3.2.0",
+    "@nestjs/typeorm": "^10.0.0",
+    "@nestjs/platform-express": "^10.3.0",
+    "typeorm": "^0.3.20",
+    "pg": "^8.11.0",
+    "reflect-metadata": "^0.2.0",
+    "rxjs": "^7.8.0",
+    "jsonwebtoken": "^9.0.0",
+    "@it0/common": "workspace:*",
+    "@it0/database": "workspace:*",
+    "ioredis": "^5.3.0"
+  },
+  "devDependencies": {
+    "@nestjs/cli": "^10.3.0",
+    "@types/node": "^20.11.0",
+    "typescript": "^5.4.0"
+  }
+}
diff --git a/packages/services/notification-service/src/application/services/event-trigger.service.ts b/packages/services/notification-service/src/application/services/event-trigger.service.ts
new file mode 100644
index 0000000..f2e5329
--- /dev/null
+++ b/packages/services/notification-service/src/application/services/event-trigger.service.ts
@@ -0,0 +1,157 @@
+import { Injectable, OnApplicationBootstrap, OnApplicationShutdown, Logger } from '@nestjs/common';
+import Redis from 'ioredis';
+import { NotificationRepository } from '../../infrastructure/repositories/notification.repository';
+
+/**
+ * EventTriggerService — Redis Stream consumer for auto-triggered notifications.
+ *
+ * Listens to platform event streams and auto-creates/sends relevant notifications.
+ *
+ * Supported events:
+ *   - events:billing.payment_failed  → BILLING notification to specific tenant
+ *   - events:billing.quota_warning   → BILLING notification to specific tenant
+ *   - events:tenant.registered       → SYSTEM welcome notification to new tenant
+ *   - events:alert.fired             → SYSTEM ops alert notification to specific tenant
+ */
+@Injectable()
+export class EventTriggerService implements OnApplicationBootstrap, OnApplicationShutdown {
+  private readonly logger = new Logger(EventTriggerService.name);
+  private redis: Redis;
+  private running = false;
+
+  private readonly GROUP = 'notification-service';
+  private readonly CONSUMER = `notification-service-${process.pid}`;
+
+  private readonly STREAMS = [
+    'events:billing.payment_failed',
+    'events:billing.quota_warning',
+    'events:tenant.registered',
+    'events:alert.fired',
+  ];
+
+  constructor(private readonly notificationRepo: NotificationRepository) {}
+
+  onApplicationBootstrap() {
+    const redisUrl = process.env.REDIS_URL || 'redis://redis:6379';
+    this.redis = new Redis(redisUrl, { lazyConnect: true, enableOfflineQueue: false });
+    this.redis.on('error', (err) => this.logger.warn(`Redis error: ${err.message}`));
+    this.running = true;
+    this.startConsuming();
+  }
+
+  onApplicationShutdown() {
+    this.running = false;
+    this.redis?.quit();
+  }
+
+  private async startConsuming() {
+    // Ensure consumer groups exist
+    for (const stream of this.STREAMS) {
+      try {
+        await this.redis.xgroup('CREATE', stream, this.GROUP, '$', 'MKSTREAM');
+      } catch {
+        // Group already exists — ok
+      }
+    }
+
+    while (this.running) {
+      try {
+        const results = await this.redis.xreadgroup(
+          'GROUP', this.GROUP, this.CONSUMER,
+          'COUNT', '10',
+          'BLOCK', '5000',
+          'STREAMS', ...this.STREAMS, ...this.STREAMS.map(() => '>'),
+        ) as [string, [string, string[]][]][] | null;
+
+        if (!results) continue;
+
+        for (const [stream, messages] of results) {
+          for (const [id, fields] of messages) {
+            try {
+              const data = JSON.parse(fields[1]);
+              await this.handleEvent(stream, data);
+              await this.redis.xack(stream, this.GROUP, id);
+            } catch (err) {
+              this.logger.error(`Failed to process event ${id} on ${stream}: ${err}`);
+            }
+          }
+        }
+      } catch (err: any) {
+        if (this.running) {
+          this.logger.warn(`Redis stream error: ${err.message}`);
+          await new Promise((r) => setTimeout(r, 2000));
+        }
+      }
+    }
+  }
+
+  private async handleEvent(stream: string, event: any): Promise<void> {
+    this.logger.debug(`Processing event from ${stream}: tenantId=${event.tenantId}`);
+
+    switch (stream) {
+      case 'events:billing.payment_failed':
+        await this.notificationRepo.create({
+          title: '支付失败提醒',
+          content: `您的账单支付失败，金额 ${event.payload?.amountFormatted ?? ''}。请及时处理，避免服务中断。`,
+          type: 'BILLING',
+          priority: 'HIGH',
+          targetType: 'SPECIFIC_TENANTS',
+          tenantIds: [event.tenantId],
+          requiresForceRead: false,
+          isEnabled: true,
+          channelKey: 'billing',
+        });
+        break;
+
+      case 'events:billing.quota_warning':
+        await this.notificationRepo.create({
+          title: '用量配额预警',
+          content: `您的账户 Token 用量已达到 ${event.payload?.usagePercent ?? 80}%，请关注用量或升级套餐。`,
+          type: 'BILLING',
+          priority: 'NORMAL',
+          targetType: 'SPECIFIC_TENANTS',
+          tenantIds: [event.tenantId],
+          requiresForceRead: false,
+          isEnabled: true,
+          channelKey: 'billing',
+        });
+        break;
+
+      case 'events:tenant.registered': {
+        // Welcome notification to new tenant — target ALL initially,
+        // but for welcome we use SPECIFIC_TENANTS
+        await this.notificationRepo.create({
+          title: '欢迎使用 iAgent！',
+          content: '感谢您注册 iAgent 平台！您现在可以部署 AI 智能体来管理您的服务器集群。如需帮助，请查看文档或联系支持团队。',
+          type: 'ANNOUNCEMENT',
+          priority: 'NORMAL',
+          targetType: 'SPECIFIC_TENANTS',
+          tenantIds: [event.tenantId],
+          requiresForceRead: false,
+          isEnabled: true,
+        });
+        break;
+      }
+
+      case 'events:alert.fired': {
+        const severity = event.payload?.severity ?? 'warning';
+        const priority = severity === 'critical' || severity === 'fatal' ? 'URGENT' : 'HIGH';
+        await this.notificationRepo.create({
+          title: `运维告警：${severity.toUpperCase()}`,
+          content: event.payload?.message ?? '服务器异常告警，请及时处理。',
+          type: 'SYSTEM',
+          priority,
+          targetType: 'SPECIFIC_TENANTS',
+          tenantIds: [event.tenantId],
+          requiresForceRead: priority === 'URGENT',
+          isEnabled: true,
+          channelKey: 'ops',
+        });
+        break;
+      }
+
+      default:
+        this.logger.warn(`Unhandled event stream: ${stream}`);
+    }
+  }
+}
diff --git a/packages/services/notification-service/src/domain/entities/notification-read.entity.ts b/packages/services/notification-service/src/domain/entities/notification-read.entity.ts
new file mode 100644
index 0000000..44472c7
--- /dev/null
+++ b/packages/services/notification-service/src/domain/entities/notification-read.entity.ts
@@ -0,0 +1,33 @@
+import {
+  Entity,
+  PrimaryGeneratedColumn,
+  Column,
+  CreateDateColumn,
+  Index,
+  Unique,
+} from 'typeorm';
+
+/**
+ * Tracks which users have read which notifications.
+ * userId is from the JWT (public.users.id).
+ */
+@Entity({ name: 'notification_reads', schema: 'public' })
+@Unique(['notificationId', 'userId'])
+export class NotificationRead {
+  @PrimaryGeneratedColumn('uuid')
+  id!: string;
+
+  @Column({ name: 'notification_id', type: 'uuid' })
+  @Index()
+  notificationId!: string;
+
+  @Column({ name: 'user_id', type: 'varchar', length: 100 })
+  @Index()
+  userId!: string;
+
+  @Column({ name: 'tenant_id', type: 'varchar', length: 100 })
+  tenantId!: string;
+
+  @CreateDateColumn({ name: 'read_at', type: 'timestamptz' })
+  readAt!: Date;
+}
diff --git a/packages/services/notification-service/src/domain/entities/notification-tenant-target.entity.ts b/packages/services/notification-service/src/domain/entities/notification-tenant-target.entity.ts
new file mode 100644
index 0000000..618dea8
--- /dev/null
+++ b/packages/services/notification-service/src/domain/entities/notification-tenant-target.entity.ts
@@ -0,0 +1,17 @@
+import { Entity, PrimaryGeneratedColumn, Column, Index } from 'typeorm';
+
+/**
+ * For SPECIFIC_TENANTS target type — lists which tenants should receive the notification.
+ */
+@Entity({ name: 'notification_tenant_targets', schema: 'public' })
+export class NotificationTenantTarget {
+  @PrimaryGeneratedColumn('uuid')
+  id!: string;
+
+  @Column({ name: 'notification_id', type: 'uuid' })
+  @Index()
+  notificationId!: string;
+
+  @Column({ name: 'tenant_id', type: 'varchar', length: 100 })
+  tenantId!: string;
+}
diff --git a/packages/services/notification-service/src/domain/entities/notification.entity.ts b/packages/services/notification-service/src/domain/entities/notification.entity.ts
new file mode 100644
index 0000000..decaa05
--- /dev/null
+++ b/packages/services/notification-service/src/domain/entities/notification.entity.ts
@@ -0,0 +1,106 @@
+import {
+  Entity,
+  PrimaryGeneratedColumn,
+  Column,
+  CreateDateColumn,
+  UpdateDateColumn,
+  Index,
+} from 'typeorm';
+
+export type NotificationType =
+  | 'SYSTEM'
+  | 'MAINTENANCE'
+  | 'FEATURE'
+  | 'ANNOUNCEMENT'
+  | 'BILLING'
+  | 'SECURITY';
+
+export type NotificationPriority = 'LOW' | 'NORMAL' | 'HIGH' | 'URGENT';
+
+export type TargetType =
+  | 'ALL'                // 全量广播
+  | 'SPECIFIC_TENANTS'  // 定点：指定租户 ID 列表
+  | 'SPECIFIC_USERS'    // 定点：指定用户 ID 列表（跨租户）
+  | 'BY_TENANT_TAG'     // 标签推送：有 X 标签的租户
+  | 'BY_PLAN'           // 分组推送：按订阅套餐
+  | 'BY_TENANT_STATUS'  // 按租户状态
+  | 'BY_SEGMENT';       // 预定义人群包
+
+export type TagLogic = 'ANY' | 'ALL';
+
+@Entity({ name: 'notifications', schema: 'public' })
+export class Notification {
+  @PrimaryGeneratedColumn('uuid')
+  id!: string;
+
+  @Column({ type: 'varchar', length: 200 })
+  title!: string;
+
+  @Column({ type: 'text' })
+  content!: string;
+
+  @Column({ type: 'varchar', length: 30, default: 'ANNOUNCEMENT' })
+  @Index()
+  type!: NotificationType;
+
+  @Column({ type: 'varchar', length: 20, default: 'NORMAL' })
+  priority!: NotificationPriority;
+
+  @Column({ name: 'target_type', type: 'varchar', length: 30, default: 'ALL' })
+  targetType!: TargetType;
+
+  // ── Targeting fields ──────────────────────────────────────────────────────
+
+  /** For BY_TENANT_TAG: array of tag UUIDs */
+  @Column({ name: 'target_tag_ids', type: 'uuid', array: true, nullable: true })
+  targetTagIds!: string[] | null;
+
+  /** For BY_TENANT_TAG: ANY (at least one tag) or ALL (every tag must match) */
+  @Column({ name: 'target_tag_logic', type: 'varchar', length: 3, default: 'ANY' })
+  targetTagLogic!: TagLogic;
+
+  /** For BY_PLAN: e.g. ['free', 'pro'] */
+  @Column({ name: 'target_plans', type: 'text', array: true, nullable: true })
+  targetPlans!: string[] | null;
+
+  /** For BY_TENANT_STATUS: e.g. ['active'] */
+  @Column({ name: 'target_statuses', type: 'text', array: true, nullable: true })
+  targetStatuses!: string[] | null;
+
+  /** For BY_SEGMENT: segment key e.g. 'trial_ending_soon' */
+  @Column({ name: 'target_segment', type: 'varchar', length: 100, nullable: true })
+  targetSegment!: string | null;
+
+  /** Notification channel key (Phase 2) — used for user opt-out filtering */
+  @Column({ name: 'channel_key', type: 'varchar', length: 50, nullable: true })
+  channelKey!: string | null;
+
+  // ── Display fields ────────────────────────────────────────────────────────
+
+  @Column({ name: 'image_url', type: 'varchar', length: 500, nullable: true })
+  imageUrl!: string | null;
+
+  @Column({ name: 'link_url', type: 'varchar', length: 500, nullable: true })
+  linkUrl!: string | null;
+
+  @Column({ name: 'requires_force_read', type: 'boolean', default: false })
+  requiresForceRead!: boolean;
+
+  @Column({ name: 'is_enabled', type: 'boolean', default: true })
+  isEnabled!: boolean;
+
+  @Column({ name: 'published_at', type: 'timestamptz', nullable: true })
+  publishedAt!: Date | null;
+
+  @Column({ name: 'expires_at', type: 'timestamptz', nullable: true })
+  expiresAt!: Date | null;
+
+  @Column({ name: 'created_by', type: 'varchar', length: 100, nullable: true })
+  createdBy!: string | null;
+
+  @CreateDateColumn({ name: 'created_at', type: 'timestamptz' })
+  createdAt!: Date;
+
+  @UpdateDateColumn({ name: 'updated_at', type: 'timestamptz' })
+  updatedAt!: Date;
+}
diff --git a/packages/services/notification-service/src/infrastructure/repositories/campaign.repository.ts b/packages/services/notification-service/src/infrastructure/repositories/campaign.repository.ts
new file mode 100644
index 0000000..f2b3a77
--- /dev/null
+++ b/packages/services/notification-service/src/infrastructure/repositories/campaign.repository.ts
@@ -0,0 +1,187 @@
+import { Injectable } from '@nestjs/common';
+import { InjectDataSource } from '@nestjs/typeorm';
+import { DataSource } from 'typeorm';
+
+export type CampaignStatus = 'DRAFT' | 'SCHEDULED' | 'RUNNING' | 'COMPLETED' | 'CANCELLED' | 'FAILED';
+export type ScheduleType = 'ONCE' | 'RECURRING';
+
+export interface Campaign {
+  id: string;
+  name: string;
+  description: string | null;
+  status: CampaignStatus;
+  notificationId: string | null;
+  scheduleType: ScheduleType;
+  scheduledAt: Date | null;
+  cronExpr: string | null;
+  timezone: string;
+  nextRunAt: Date | null;
+  lastRunAt: Date | null;
+  targetCount: number;
+  sentCount: number;
+  readCount: number;
+  createdBy: string | null;
+  createdAt: Date;
+  updatedAt: Date;
+}
+
+export interface CreateCampaignDto {
+  name: string;
+  description?: string;
+  notificationId?: string;
+  scheduleType: ScheduleType;
+  scheduledAt?: Date | null;
+  cronExpr?: string | null;
+  timezone?: string;
+  createdBy?: string;
+}
+
+@Injectable()
+export class CampaignRepository {
+  constructor(@InjectDataSource() private readonly ds: DataSource) {}
+
+  async create(dto: CreateCampaignDto): Promise<Campaign> {
+    const result = await this.ds.query(
+      `INSERT INTO public.notification_campaigns
+         (name, description, notification_id, schedule_type, scheduled_at, cron_expr, timezone, next_run_at, created_by)
+       VALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9)
+       RETURNING *`,
+      [
+        dto.name, dto.description ?? null, dto.notificationId ?? null,
+        dto.scheduleType, dto.scheduledAt ?? null, dto.cronExpr ?? null,
+        dto.timezone ?? 'UTC',
+        dto.scheduleType === 'ONCE' ? dto.scheduledAt ?? null : null,
+        dto.createdBy ?? null,
+      ],
+    );
+    return this.mapRow(result[0]);
+  }
+
+  async findAll(params: { status?: string; limit: number; offset: number }): Promise<{ items: Campaign[]; total: number }> {
+    const conds: string[] = [];
+    const args: any[] = [];
+    let p = 1;
+    if (params.status) { conds.push(`status = $${p++}`); args.push(params.status); }
+    const where = conds.length ? `WHERE ${conds.join(' AND ')}` : '';
+    const [rows, count] = await Promise.all([
+      this.ds.query(
+        `SELECT * FROM public.notification_campaigns ${where} ORDER BY created_at DESC LIMIT $${p} OFFSET $${p + 1}`,
+        [...args, params.limit, params.offset],
+      ),
+      this.ds.query(`SELECT COUNT(*)::int AS total FROM public.notification_campaigns ${where}`, args),
+    ]);
+    return { items: rows.map(this.mapRow), total: count[0]?.total ?? 0 };
+  }
+
+  async findById(id: string): Promise<Campaign | null> {
+    const rows = await this.ds.query(`SELECT * FROM public.notification_campaigns WHERE id = $1`, [id]);
+    return rows.length ? this.mapRow(rows[0]) : null;
+  }
+
+  async update(id: string, dto: Partial<CreateCampaignDto> & { status?: CampaignStatus; nextRunAt?: Date | null; lastRunAt?: Date | null; sentCount?: number; readCount?: number }): Promise<Campaign | null> {
+    const fields: string[] = [];
+    const values: any[] = [];
+    let idx = 1;
+    const add = (col: string, val: any) => { fields.push(`${col} = $${idx++}`); values.push(val); };
+    if (dto.name !== undefined) add('name', dto.name);
+    if (dto.description !== undefined) add('description', dto.description);
+    if (dto.notificationId !== undefined) add('notification_id', dto.notificationId);
+    if (dto.scheduleType !== undefined) add('schedule_type', dto.scheduleType);
+    if (dto.scheduledAt !== undefined) add('scheduled_at', dto.scheduledAt);
+    if (dto.cronExpr !== undefined) add('cron_expr', dto.cronExpr);
+    if (dto.timezone !== undefined) add('timezone', dto.timezone);
+    if (dto.status !== undefined) add('status', dto.status);
+    if (dto.nextRunAt !== undefined) add('next_run_at', dto.nextRunAt);
+    if (dto.lastRunAt !== undefined) add('last_run_at', dto.lastRunAt);
+    if (dto.sentCount !== undefined) add('sent_count', dto.sentCount);
+    if (dto.readCount !== undefined) add('read_count', dto.readCount);
+    fields.push('updated_at = NOW()');
+    values.push(id);
+    const result = await this.ds.query(
+      `UPDATE public.notification_campaigns SET ${fields.join(', ')} WHERE id = $${idx} RETURNING *`,
+      values,
+    );
+    return result.length ? this.mapRow(result[0]) : null;
+  }
+
+  async delete(id: string): Promise<void> {
+    await this.ds.query(`DELETE FROM public.notification_campaigns WHERE id = $1`, [id]);
+  }
+
+  async getStats(campaignId: string): Promise<{
+    targetCount: number;
+    sentCount: number;
+    readCount: number;
+    readRate: number;
+    executions: any[];
+  }> {
+    const [campaign, execs] = await Promise.all([
+      this.findById(campaignId),
+      this.ds.query(
+        `SELECT * FROM public.campaign_execution_log WHERE campaign_id = $1 ORDER BY started_at DESC LIMIT 20`,
+        [campaignId],
+      ),
+    ]);
+    const target = campaign?.targetCount ?? 0;
+    const sent = campaign?.sentCount ?? 0;
+    const read = campaign?.readCount ?? 0;
+    return {
+      targetCount: target,
+      sentCount: sent,
+      readCount: read,
+      readRate: sent > 0 ? Math.round((read / sent) * 1000) / 10 : 0,
+      executions: execs,
+    };
+  }
+
+  /** Find campaigns due for execution (ONCE or RECURRING with next_run_at <= now) */
+  async findDue(): Promise<Campaign[]> {
+    const rows = await this.ds.query(
+      `SELECT * FROM public.notification_campaigns
+       WHERE status = 'SCHEDULED' AND next_run_at IS NOT NULL AND next_run_at <= NOW()
+       ORDER BY next_run_at ASC
+       LIMIT 50`,
+    );
+    return rows.map(this.mapRow);
+  }
+
+  async logExecution(campaignId: string, notificationId: string | null, targetCount: number): Promise<string> {
+    const result = await this.ds.query(
+      `INSERT INTO public.campaign_execution_log (campaign_id, notification_id, target_count)
+       VALUES ($1, $2, $3) RETURNING id`,
+      [campaignId, notificationId, targetCount],
+    );
+    return result[0].id;
+  }
+
+  async finishExecution(execId: string, sentCount: number, status: 'COMPLETED' | 'FAILED', error?: string): Promise<void> {
+    await this.ds.query(
+      `UPDATE public.campaign_execution_log
+       SET finished_at = NOW(), status = $2, sent_count = $3, error = $4
+       WHERE id = $1`,
+      [execId, status, sentCount, error ?? null],
+    );
+  }
+
+  private mapRow(r: any): Campaign {
+    return {
+      id: r.id,
+      name: r.name,
+      description: r.description,
+      status: r.status,
+      notificationId: r.notification_id,
+      scheduleType: r.schedule_type,
+      scheduledAt: r.scheduled_at,
+      cronExpr: r.cron_expr,
+      timezone: r.timezone,
+      nextRunAt: r.next_run_at,
+      lastRunAt: r.last_run_at,
+      targetCount: r.target_count,
+      sentCount: r.sent_count,
+      readCount: r.read_count,
+      createdBy: r.created_by,
+      createdAt: r.created_at,
+      updatedAt: r.updated_at,
+    };
+  }
+}
diff --git a/packages/services/notification-service/src/infrastructure/repositories/channel.repository.ts b/packages/services/notification-service/src/infrastructure/repositories/channel.repository.ts
new file mode 100644
index 0000000..b112ea3
--- /dev/null
+++ b/packages/services/notification-service/src/infrastructure/repositories/channel.repository.ts
@@ -0,0 +1,127 @@
+import { Injectable } from '@nestjs/common';
+import { InjectDataSource } from '@nestjs/typeorm';
+import { DataSource } from 'typeorm';
+
+export interface NotificationChannel {
+  channelKey: string;
+  name: string;
+  description: string | null;
+  isMandatory: boolean;
+  isEnabled: boolean;
+  createdAt: Date;
+  updatedAt: Date;
+}
+
+export interface UserChannelPreference {
+  userId: string;
+  channelKey: string;
+  enabled: boolean;
+  updatedAt: Date;
+}
+
+@Injectable()
+export class ChannelRepository {
+  constructor(@InjectDataSource() private readonly ds: DataSource) {}
+
+  async listChannels(): Promise<NotificationChannel[]> {
+    const rows = await this.ds.query(
+      `SELECT * FROM public.notification_channels WHERE is_enabled = true ORDER BY is_mandatory DESC, channel_key`,
+    );
+    return rows.map(this.mapChannel);
+  }
+
+  async createChannel(dto: {
+    channelKey: string;
+    name: string;
+    description?: string;
+    isMandatory?: boolean;
+  }): Promise<NotificationChannel> {
+    const result = await this.ds.query(
+      `INSERT INTO public.notification_channels (channel_key, name, description, is_mandatory)
+       VALUES ($1, $2, $3, $4) RETURNING *`,
+      [dto.channelKey, dto.name, dto.description ?? null, dto.isMandatory ?? false],
+    );
+    return this.mapChannel(result[0]);
+  }
+
+  async updateChannel(
+    channelKey: string,
+    dto: { name?: string; description?: string; isMandatory?: boolean; isEnabled?: boolean },
+  ): Promise<NotificationChannel | null> {
+    const fields: string[] = [];
+    const values: any[] = [];
+    let idx = 1;
+    if (dto.name !== undefined) { fields.push(`name = $${idx++}`); values.push(dto.name); }
+    if (dto.description !== undefined) { fields.push(`description = $${idx++}`); values.push(dto.description); }
+    if (dto.isMandatory !== undefined) { fields.push(`is_mandatory = $${idx++}`); values.push(dto.isMandatory); }
+    if (dto.isEnabled !== undefined) { fields.push(`is_enabled = $${idx++}`); values.push(dto.isEnabled); }
+    fields.push(`updated_at = NOW()`);
+    values.push(channelKey);
+    const result = await this.ds.query(
+      `UPDATE public.notification_channels SET ${fields.join(', ')} WHERE channel_key = $${idx} RETURNING *`,
+      values,
+    );
+    return result.length ? this.mapChannel(result[0]) : null;
+  }
+
+  async deleteChannel(channelKey: string): Promise<void> {
+    await this.ds.query(`DELETE FROM public.notification_channels WHERE channel_key = $1`, [channelKey]);
+  }
+
+  // ── User preferences ──────────────────────────────────────────────────────
+
+  async getUserPreferences(userId: string): Promise<UserChannelPreference[]> {
+    const rows = await this.ds.query(
+      `SELECT p.*, c.name, c.is_mandatory
+       FROM public.notification_channels c
+       LEFT JOIN public.user_notification_preferences p ON p.user_id = $1 AND p.channel_key = c.channel_key
+       WHERE c.is_enabled = true
+       ORDER BY c.is_mandatory DESC, c.channel_key`,
+      [userId],
+    );
+    return rows.map((r: any) => ({
+      userId,
+      channelKey: r.channel_key,
+      channelName: r.name,
+      isMandatory: r.is_mandatory,
+      enabled: r.enabled !== null ? r.enabled : true,
+      updatedAt: r.updated_at,
+    }));
+  }
+
+  async setUserPreference(userId: string, channelKey: string, enabled: boolean): Promise<void> {
+    // Cannot disable mandatory channels
+    const channel = await this.ds.query(
+      `SELECT is_mandatory FROM public.notification_channels WHERE channel_key = $1`,
+      [channelKey],
+    );
+    if (!channel.length) throw new Error(`Channel '${channelKey}' not found`);
+    if (channel[0].is_mandatory && !enabled) {
+      throw new Error(`Channel '${channelKey}' is mandatory and cannot be disabled`);
+    }
+    await this.ds.query(
+      `INSERT INTO public.user_notification_preferences (user_id, channel_key, enabled)
+       VALUES ($1, $2, $3)
+       ON CONFLICT (user_id, channel_key) DO UPDATE SET enabled = $3, updated_at = NOW()`,
+      [userId, channelKey, enabled],
+    );
+  }
+
+  async setAllUserPreferences(userId: string, preferences: { channelKey: string; enabled: boolean }[]): Promise<void> {
+    for (const pref of preferences) {
+      await this.setUserPreference(userId, pref.channelKey, pref.enabled);
+    }
+  }
+
+  private mapChannel(r: any): NotificationChannel {
+    return {
+      channelKey: r.channel_key,
+      name: r.name,
+      description: r.description,
+      isMandatory: r.is_mandatory,
+      isEnabled: r.is_enabled,
+      createdAt: r.created_at,
+      updatedAt: r.updated_at,
+    };
+  }
+}
diff --git a/packages/services/notification-service/src/infrastructure/repositories/notification.repository.ts b/packages/services/notification-service/src/infrastructure/repositories/notification.repository.ts
new file mode 100644
index 0000000..603744c
--- /dev/null
+++ b/packages/services/notification-service/src/infrastructure/repositories/notification.repository.ts
@@ -0,0 +1,364 @@
+import { Injectable } from '@nestjs/common';
+import { InjectDataSource } from '@nestjs/typeorm';
+import { DataSource } from 'typeorm';
+import { Notification, NotificationType, TargetType, TagLogic } from '../../domain/entities/notification.entity';
+
+export interface CreateNotificationDto {
+  title: string;
+  content: string;
+  type: NotificationType;
+  priority: string;
+  targetType: TargetType;
+  // Targeting payloads
+  tenantIds?: string[];          // SPECIFIC_TENANTS
+  userIds?: string[];            // SPECIFIC_USERS
+  targetTagIds?: string[];       // BY_TENANT_TAG
+  targetTagLogic?: TagLogic;     // BY_TENANT_TAG: ANY | ALL
+  targetPlans?: string[];        // BY_PLAN: ['free','pro','enterprise']
+  targetStatuses?: string[];     // BY_TENANT_STATUS: ['active','suspended']
+  targetSegment?: string;        // BY_SEGMENT: segment key
+  channelKey?: string | null;    // Phase 2 opt-out channel
+  imageUrl?: string | null;
+  linkUrl?: string | null;
+  requiresForceRead: boolean;
+  isEnabled: boolean;
+  publishedAt?: Date | null;
+  expiresAt?: Date | null;
+  createdBy?: string;
+}
+
+export interface NotificationWithReadStatus extends Notification {
+  isRead: boolean;
+}
+
+@Injectable()
+export class NotificationRepository {
+  constructor(@InjectDataSource() private readonly ds: DataSource) {}
+
+  // ── Write Operations ──────────────────────────────────────────────────────
+
+  async create(dto: CreateNotificationDto): Promise<Notification> {
+    const result = await this.ds.query(
+      `INSERT INTO public.notifications
+         (title, content, type, priority, target_type,
+          target_tag_ids, target_tag_logic, target_plans, target_statuses,
+          target_segment, channel_key,
+          image_url, link_url, requires_force_read, is_enabled,
+          published_at, expires_at, created_by)
+       VALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12,$13,$14,$15,$16,$17,$18)
+       RETURNING *`,
+      [
+        dto.title, dto.content, dto.type, dto.priority, dto.targetType,
+        dto.targetTagIds?.length ? dto.targetTagIds : null,
+        dto.targetTagLogic ?? 'ANY',
+        dto.targetPlans?.length ? dto.targetPlans : null,
+        dto.targetStatuses?.length ? dto.targetStatuses : null,
+        dto.targetSegment ?? null,
+        dto.channelKey ?? null,
+        dto.imageUrl ?? null, dto.linkUrl ?? null,
+        dto.requiresForceRead, dto.isEnabled,
+        dto.publishedAt ?? null, dto.expiresAt ?? null, dto.createdBy ?? null,
+      ],
+    );
+    const row = result[0];
+
+    if (dto.targetType === 'SPECIFIC_TENANTS' && dto.tenantIds?.length) {
+      for (const tid of dto.tenantIds) {
+        await this.ds.query(
+          `INSERT INTO public.notification_tenant_targets (notification_id, tenant_id)
+           VALUES ($1, $2) ON CONFLICT DO NOTHING`,
+          [row.id, tid],
+        );
+      }
+    }
+
+    if (dto.targetType === 'SPECIFIC_USERS' && dto.userIds?.length) {
+      for (const uid of dto.userIds) {
+        await this.ds.query(
+          `INSERT INTO public.notification_user_targets (notification_id, user_id)
+           VALUES ($1, $2) ON CONFLICT DO NOTHING`,
+          [row.id, uid],
+        );
+      }
+    }
+
+    return this.mapRow(row);
+  }
+
+  async update(id: string, dto: Partial<CreateNotificationDto>): Promise<Notification | null> {
+    const fields: string[] = [];
+    const values: any[] = [];
+    let idx = 1;
+
+    const add = (col: string, val: any) => { fields.push(`${col} = $${idx++}`); values.push(val); };
+
+    if (dto.title !== undefined) add('title', dto.title);
+    if (dto.content !== undefined) add('content', dto.content);
+    if (dto.type !== undefined) add('type', dto.type);
+    if (dto.priority !== undefined) add('priority', dto.priority);
+    if (dto.targetType !== undefined) add('target_type', dto.targetType);
+    if (dto.targetTagIds !== undefined) add('target_tag_ids', dto.targetTagIds?.length ? dto.targetTagIds : null);
+    if (dto.targetTagLogic !== undefined) add('target_tag_logic', dto.targetTagLogic);
+    if (dto.targetPlans !== undefined) add('target_plans', dto.targetPlans?.length ? dto.targetPlans : null);
+    if (dto.targetStatuses !== undefined) add('target_statuses', dto.targetStatuses?.length ? dto.targetStatuses : null);
+    if (dto.targetSegment !== undefined) add('target_segment', dto.targetSegment);
+    if (dto.channelKey !== undefined) add('channel_key', dto.channelKey);
+    if (dto.imageUrl !== undefined) add('image_url', dto.imageUrl);
+    if (dto.linkUrl !== undefined) add('link_url', dto.linkUrl);
+    if (dto.requiresForceRead !== undefined) add('requires_force_read', dto.requiresForceRead);
+    if (dto.isEnabled !== undefined) add('is_enabled', dto.isEnabled);
+    if (dto.publishedAt !== undefined) add('published_at', dto.publishedAt);
+    if (dto.expiresAt !== undefined) add('expires_at', dto.expiresAt);
+    fields.push(`updated_at = NOW()`);
+
+    if (fields.length === 1) return this.findById(id);
+
+    values.push(id);
+    const result = await this.ds.query(
+      `UPDATE public.notifications SET ${fields.join(', ')} WHERE id = $${idx} RETURNING *`,
+      values,
+    );
+    if (!result.length) return null;
+
+    // Re-sync SPECIFIC_TENANTS targets
+    if (dto.targetType !== undefined || dto.tenantIds !== undefined) {
+      await this.ds.query(`DELETE FROM public.notification_tenant_targets WHERE notification_id = $1`, [id]);
+      const newType = dto.targetType ?? (await this.findById(id))?.targetType;
+      if (newType === 'SPECIFIC_TENANTS' && dto.tenantIds?.length) {
+        for (const tid of dto.tenantIds) {
+          await this.ds.query(
+            `INSERT INTO public.notification_tenant_targets (notification_id, tenant_id) VALUES ($1, $2) ON CONFLICT DO NOTHING`,
+            [id, tid],
+          );
+        }
+      }
+    }
+
+    // Re-sync SPECIFIC_USERS targets
+    if (dto.targetType !== undefined || dto.userIds !== undefined) {
+      await this.ds.query(`DELETE FROM public.notification_user_targets WHERE notification_id = $1`, [id]);
+      const newType = dto.targetType ?? (await this.findById(id))?.targetType;
+      if (newType === 'SPECIFIC_USERS' && dto.userIds?.length) {
+        for (const uid of dto.userIds) {
+          await this.ds.query(
+            `INSERT INTO public.notification_user_targets (notification_id, user_id) VALUES ($1, $2) ON CONFLICT DO NOTHING`,
+            [id, uid],
+          );
+        }
+      }
+    }
+
+    return this.mapRow(result[0]);
+  }
+
+  async delete(id: string): Promise<void> {
+    await this.ds.query(`DELETE FROM public.notification_tenant_targets WHERE notification_id = $1`, [id]);
+    await this.ds.query(`DELETE FROM public.notification_user_targets WHERE notification_id = $1`, [id]);
+    await this.ds.query(`DELETE FROM public.notification_reads WHERE notification_id = $1`, [id]);
+    await this.ds.query(`DELETE FROM public.notifications WHERE id = $1`, [id]);
+  }
+
+  async findById(id: string): Promise<Notification | null> {
+    const rows = await this.ds.query(`SELECT * FROM public.notifications WHERE id = $1`, [id]);
+    return rows.length ? this.mapRow(rows[0]) : null;
+  }
+
+  async findAllAdmin(params: {
+    type?: string;
+    targetType?: string;
+    limit: number;
+    offset: number;
+  }): Promise<{ items: (Notification & { tenantIds: string[]; userIds: string[] })[]; total: number }> {
+    const conds: string[] = [];
+    const baseArgs: any[] = [];
+    let p = 1;
+    if (params.type) { conds.push(`type = $${p++}`); baseArgs.push(params.type); }
+    if (params.targetType) { conds.push(`target_type = $${p++}`); baseArgs.push(params.targetType); }
+    const where = conds.length ? `WHERE ${conds.join(' AND ')}` : '';
+
+    const [rows, count] = await Promise.all([
+      this.ds.query(
+        `SELECT * FROM public.notifications ${where} ORDER BY created_at DESC LIMIT $${p} OFFSET $${p + 1}`,
+        [...baseArgs, params.limit, params.offset],
+      ),
+      this.ds.query(`SELECT COUNT(*)::int AS total FROM public.notifications ${where}`, baseArgs),
+    ]);
+
+    const items = await Promise.all(
+      rows.map(async (r: any) => {
+        const [tenants, users] = await Promise.all([
+          this.ds.query(`SELECT tenant_id FROM public.notification_tenant_targets WHERE notification_id = $1`, [r.id]),
+          this.ds.query(`SELECT user_id FROM public.notification_user_targets WHERE notification_id = $1`, [r.id]),
+        ]);
+        return {
+          ...this.mapRow(r),
+          tenantIds: tenants.map((t: any) => t.tenant_id),
+          userIds: users.map((u: any) => u.user_id),
+        };
+      }),
+    );
+
+    return { items, total: count[0]?.total ?? 0 };
+  }
+
+  // ── User-facing delivery ──────────────────────────────────────────────────
+
+  async findForUser(params: {
+    tenantId: string;
+    userId: string;
+    tenantPlan?: string;
+    tenantStatus?: string;
+    limit: number;
+    offset: number;
+  }): Promise<{ items: NotificationWithReadStatus[]; total: number }> {
+    const { tenantId, userId, tenantPlan, tenantStatus, limit, offset } = params;
+    const targeting = this._targetingSQL();
+    const channelFilter = this._channelFilterSQL();
+
+    const baseWhere = `
+      n.is_enabled = true
+      AND (n.published_at IS NULL OR n.published_at <= NOW())
+      AND (n.expires_at IS NULL OR n.expires_at > NOW())
+      AND ${targeting}
+      AND ${channelFilter}`;
+
+    const [rows, count] = await Promise.all([
+      this.ds.query(
+        `SELECT n.*, CASE WHEN nr.id IS NOT NULL THEN true ELSE false END AS is_read
+         FROM public.notifications n
+         LEFT JOIN public.notification_reads nr ON nr.notification_id = n.id AND nr.user_id = $2
+         WHERE ${baseWhere}
+         ORDER BY n.requires_force_read DESC, n.priority DESC,
+                  COALESCE(n.published_at, n.created_at) DESC
+         LIMIT $5 OFFSET $6`,
+        [tenantId, userId, tenantPlan ?? null, tenantStatus ?? null, limit, offset],
+      ),
+      this.ds.query(
+        `SELECT COUNT(*)::int AS total FROM public.notifications n WHERE ${baseWhere}`,
+        [tenantId, userId, tenantPlan ?? null, tenantStatus ?? null],
+      ),
+    ]);
+
+    return {
+      items: rows.map((r: any) => ({ ...this.mapRow(r), isRead: r.is_read })),
+      total: count[0]?.total ?? 0,
+    };
+  }
+
+  async getUnreadCount(tenantId: string, userId: string, tenantPlan?: string, tenantStatus?: string): Promise<number> {
+    const targeting = this._targetingSQL();
+    const result = await this.ds.query(
+      `SELECT COUNT(*)::int AS cnt
+       FROM public.notifications n
+       WHERE n.is_enabled = true
+         AND (n.published_at IS NULL OR n.published_at <= NOW())
+         AND (n.expires_at IS NULL OR n.expires_at > NOW())
+         AND ${targeting}
+         AND NOT EXISTS (
+           SELECT 1 FROM public.notification_reads nr
+           WHERE nr.notification_id = n.id AND nr.user_id = $2
+         )`,
+      [tenantId, userId, tenantPlan ?? null, tenantStatus ?? null],
+    );
+    return result[0]?.cnt ?? 0;
+  }
+
+  async markRead(notificationId: string, userId: string, tenantId: string): Promise<void> {
+    await this.ds.query(
+      `INSERT INTO public.notification_reads (notification_id, user_id, tenant_id)
+       VALUES ($1, $2, $3) ON CONFLICT (notification_id, user_id) DO NOTHING`,
+      [notificationId, userId, tenantId],
+    );
+  }
+
+  async markAllRead(tenantId: string, userId: string): Promise<void> {
+    await this.ds.query(
+      `INSERT INTO public.notification_reads (notification_id, user_id, tenant_id)
+       SELECT n.id, $2, $1
+       FROM public.notifications n
+       WHERE n.is_enabled = true
+         AND (n.published_at IS NULL OR n.published_at <= NOW())
+         AND (n.expires_at IS NULL OR n.expires_at > NOW())
+         AND (n.target_type = 'ALL'
+           OR (n.target_type = 'SPECIFIC_TENANTS' AND EXISTS (
+             SELECT 1 FROM public.notification_tenant_targets t
+             WHERE t.notification_id = n.id AND t.tenant_id = $1)))
+       ON CONFLICT (notification_id, user_id) DO NOTHING`,
+      [tenantId, userId],
+    );
+  }
+
+  // ── Analytics ─────────────────────────────────────────────────────────────
+
+  async getDeliveryStats(notificationId: string): Promise<{ readCount: number }> {
+    const result = await this.ds.query(
+      `SELECT COUNT(*)::int AS cnt FROM public.notification_reads WHERE notification_id = $1`,
+      [notificationId],
+    );
+    return { readCount: result[0]?.cnt ?? 0 };
+  }
+
+  // ── SQL helpers ───────────────────────────────────────────────────────────
+
+  private _targetingSQL(): string {
+    return `(
+      n.target_type = 'ALL'
+
+      OR (n.target_type = 'SPECIFIC_TENANTS' AND EXISTS (
+        SELECT 1 FROM public.notification_tenant_targets t
+        WHERE t.notification_id = n.id AND t.tenant_id = $1))
+
+      OR (n.target_type = 'SPECIFIC_USERS' AND EXISTS (
+        SELECT 1 FROM public.notification_user_targets u
+        WHERE u.notification_id = n.id AND u.user_id = $2))
+
+      OR (n.target_type = 'BY_TENANT_TAG' AND n.target_tag_ids IS NOT NULL AND (
+        CASE WHEN n.target_tag_logic = 'ALL' THEN
+          (SELECT COUNT(*) FROM public.tenant_tag_assignments ta
+           WHERE ta.tenant_id = $1 AND ta.tag_id = ANY(n.target_tag_ids))
+          = array_length(n.target_tag_ids, 1)
+        ELSE
+          EXISTS (SELECT 1 FROM public.tenant_tag_assignments ta
+                  WHERE ta.tenant_id = $1 AND ta.tag_id = ANY(n.target_tag_ids))
+        END))
+
+      OR (n.target_type = 'BY_PLAN' AND $3::text IS NOT NULL
+          AND n.target_plans IS NOT NULL AND $3 = ANY(n.target_plans))
+
+      OR (n.target_type = 'BY_TENANT_STATUS' AND $4::text IS NOT NULL
+          AND n.target_statuses IS NOT NULL AND $4 = ANY(n.target_statuses))
+
+      OR (n.target_type = 'BY_SEGMENT' AND EXISTS (
+        SELECT 1 FROM public.notification_segment_members sm
+        WHERE sm.segment_key = n.target_segment AND sm.tenant_id = $1))
+    )`;
+  }
+
+  private _channelFilterSQL(): string {
+    return `(
+      n.channel_key IS NULL
+      OR n.channel_key IN (
+        SELECT c.channel_key FROM public.notification_channels c
+        WHERE c.is_mandatory = true)
+      OR NOT EXISTS (
+        SELECT 1 FROM public.user_notification_preferences pref
+        WHERE pref.user_id = $2
+          AND pref.channel_key = n.channel_key
+          AND pref.enabled = false)
+    )`;
+  }
+
+  mapRow(r: any): Notification {
+    return {
+      id: r.id, title: r.title, content: r.content,
+      type: r.type, priority: r.priority, targetType: r.target_type,
+      targetTagIds: r.target_tag_ids, targetTagLogic: r.target_tag_logic ?? 'ANY',
+      targetPlans: r.target_plans, targetStatuses: r.target_statuses,
+      targetSegment: r.target_segment, channelKey: r.channel_key,
+      imageUrl: r.image_url, linkUrl: r.link_url,
+      requiresForceRead: r.requires_force_read, isEnabled: r.is_enabled,
+      publishedAt: r.published_at, expiresAt: r.expires_at,
+      createdBy: r.created_by, createdAt: r.created_at, updatedAt: r.updated_at,
+    } as Notification;
+  }
+}
diff --git a/packages/services/notification-service/src/infrastructure/repositories/segment.repository.ts b/packages/services/notification-service/src/infrastructure/repositories/segment.repository.ts
new file mode 100644
index 0000000..eba2625
--- /dev/null
+++ b/packages/services/notification-service/src/infrastructure/repositories/segment.repository.ts
@@ -0,0 +1,93 @@
+import { Injectable } from '@nestjs/common';
+import { InjectDataSource } from '@nestjs/typeorm';
+import { DataSource } from 'typeorm';
+
+export interface SegmentInfo {
+  segmentKey: string;
+  memberCount: number;
+  syncedAt: Date | null;
+}
+
+@Injectable()
+export class SegmentRepository {
+  constructor(@InjectDataSource() private readonly ds: DataSource) {}
+
+  async listSegments(): Promise<SegmentInfo[]> {
+    const rows = await this.ds.query(
+      `SELECT segment_key, COUNT(*)::int AS member_count, MAX(synced_at) AS synced_at
+       FROM public.notification_segment_members
+       GROUP BY segment_key
+       ORDER BY segment_key`,
+    );
+    return rows.map((r: any) => ({
+      segmentKey: r.segment_key,
+      memberCount: r.member_count,
+      syncedAt: r.synced_at,
+    }));
+  }
+
+  async getSegmentMembers(
+    segmentKey: string,
+    limit = 100,
+    offset = 0,
+  ): Promise<{ items: { tenantId: string; syncedAt: Date }[]; total: number }> {
+    const [rows, count] = await Promise.all([
+      this.ds.query(
+        `SELECT tenant_id, synced_at FROM public.notification_segment_members
+         WHERE segment_key = $1 ORDER BY synced_at DESC LIMIT $2 OFFSET $3`,
+        [segmentKey, limit, offset],
+      ),
+      this.ds.query(
+        `SELECT COUNT(*)::int AS total FROM public.notification_segment_members WHERE segment_key = $1`,
+        [segmentKey],
+      ),
+    ]);
+    return {
+      items: rows.map((r: any) => ({ tenantId: r.tenant_id, syncedAt: r.synced_at })),
+      total: count[0]?.total ?? 0,
+    };
+  }
+
+  /** Bulk upsert: replace the entire segment membership */
+  async syncSegment(segmentKey: string, tenantIds: string[]): Promise<void> {
+    await this.ds.query(
+      `DELETE FROM public.notification_segment_members WHERE segment_key = $1`,
+      [segmentKey],
+    );
+    if (tenantIds.length === 0) return;
+    // Batch insert using VALUES
+    const values = tenantIds.map((tid, i) => `($1, $${i + 2}, NOW())`).join(', ');
+    await this.ds.query(
+      `INSERT INTO public.notification_segment_members (segment_key, tenant_id, synced_at)
+       VALUES ${values} ON CONFLICT DO NOTHING`,
+      [segmentKey, ...tenantIds],
+    );
+  }
+
+  /** Incremental add/remove */
+  async addToSegment(segmentKey: string, tenantIds: string[]): Promise<void> {
+    for (const tid of tenantIds) {
+      await this.ds.query(
+        `INSERT INTO public.notification_segment_members (segment_key, tenant_id)
+         VALUES ($1, $2) ON CONFLICT DO NOTHING`,
+        [segmentKey, tid],
+      );
+    }
+  }
+
+  async removeFromSegment(segmentKey: string, tenantIds: string[]): Promise<void> {
+    if (!tenantIds.length) return;
+    await this.ds.query(
+      `DELETE FROM public.notification_segment_members
+       WHERE segment_key = $1 AND tenant_id = ANY($2::text[])`,
+      [segmentKey, tenantIds],
+    );
+  }
+
+  async deleteSegment(segmentKey: string): Promise<void> {
+    await this.ds.query(
+      `DELETE FROM public.notification_segment_members WHERE segment_key = $1`,
+      [segmentKey],
+    );
+  }
+}
diff --git a/packages/services/notification-service/src/interfaces/rest/controllers/campaign-admin.controller.ts b/packages/services/notification-service/src/interfaces/rest/controllers/campaign-admin.controller.ts
new file mode 100644
index 0000000..b17e282
--- /dev/null
+++ b/packages/services/notification-service/src/interfaces/rest/controllers/campaign-admin.controller.ts
@@ -0,0 +1,168 @@
+import {
+  Controller,
+  Get,
+  Post,
+  Put,
+  Delete,
+  Param,
+  Body,
+  Query,
+  Headers,
+  UnauthorizedException,
+  NotFoundException,
+  HttpCode,
+  HttpStatus,
+  ParseIntPipe,
+  DefaultValuePipe,
+} from '@nestjs/common';
+import { CampaignRepository, CreateCampaignDto } from '../../../infrastructure/repositories/campaign.repository';
+import * as jwt from 'jsonwebtoken';
+
+/**
+ * Platform-admin Campaign management endpoints.
+ * A campaign wraps a notification + schedule logic (ONCE or RECURRING cron).
+ */
+@Controller('api/v1/notifications/campaigns')
+export class CampaignAdminController {
+  constructor(private readonly repo: CampaignRepository) {}
+
+  /** POST /api/v1/notifications/campaigns — create */
+  @Post()
+  async create(
+    @Headers('authorization') auth: string,
+    @Body() body: any,
+  ) {
+    const admin = this.requireAdmin(auth);
+    return this.repo.create({
+      name: body.name,
+      description: body.description,
+      notificationId: body.notificationId,
+      scheduleType: body.scheduleType ?? 'ONCE',
+      scheduledAt: body.scheduledAt ? new Date(body.scheduledAt) : null,
+      cronExpr: body.cronExpr ?? null,
+      timezone: body.timezone ?? 'UTC',
+      createdBy: admin.userId,
+    } as CreateCampaignDto);
+  }
+
+  /** GET /api/v1/notifications/campaigns — list */
+  @Get()
+  async list(
+    @Headers('authorization') auth: string,
+    @Query('status') status: string | undefined,
+    @Query('limit', new DefaultValuePipe(20), ParseIntPipe) limit: number,
+    @Query('offset', new DefaultValuePipe(0), ParseIntPipe) offset: number,
+  ) {
+    this.requireAdmin(auth);
+    return this.repo.findAll({ status, limit: Math.min(limit, 100), offset });
+  }
+
+  /** GET /api/v1/notifications/campaigns/:id — detail */
+  @Get(':id')
+  async getOne(
+    @Headers('authorization') auth: string,
+    @Param('id') id: string,
+  ) {
+    this.requireAdmin(auth);
+    const item = await this.repo.findById(id);
+    if (!item) throw new NotFoundException('Campaign not found');
+    return item;
+  }
+
+  /** GET /api/v1/notifications/campaigns/:id/stats — analytics */
+  @Get(':id/stats')
+  async getStats(
+    @Headers('authorization') auth: string,
+    @Param('id') id: string,
+  ) {
+    this.requireAdmin(auth);
+    const item = await this.repo.findById(id);
+    if (!item) throw new NotFoundException('Campaign not found');
+    return this.repo.getStats(id);
+  }
+
+  /** PUT /api/v1/notifications/campaigns/:id — update */
+  @Put(':id')
+  async update(
+    @Headers('authorization') auth: string,
+    @Param('id') id: string,
+    @Body() body: any,
+  ) {
+    this.requireAdmin(auth);
+    const dto: any = {};
+    if (body.name !== undefined) dto.name = body.name;
+    if (body.description !== undefined) dto.description = body.description;
+    if (body.notificationId !== undefined) dto.notificationId = body.notificationId;
+    if (body.scheduleType !== undefined) dto.scheduleType = body.scheduleType;
+    if (body.scheduledAt !== undefined) dto.scheduledAt = body.scheduledAt ? new Date(body.scheduledAt) : null;
+    if (body.cronExpr !== undefined) dto.cronExpr = body.cronExpr;
+    if (body.timezone !== undefined) dto.timezone = body.timezone;
+
+    const updated = await this.repo.update(id, dto);
+    if (!updated) throw new NotFoundException('Campaign not found');
+    return updated;
+  }
+
+  /** POST /api/v1/notifications/campaigns/:id/schedule — schedule / re-schedule */
+  @Post(':id/schedule')
+  async schedule(
+    @Headers('authorization') auth: string,
+    @Param('id') id: string,
+    @Body() body: { scheduledAt?: string; cronExpr?: string; timezone?: string },
+  ) {
+    this.requireAdmin(auth);
+    const campaign = await this.repo.findById(id);
+    if (!campaign) throw new NotFoundException('Campaign not found');
+
+    const update: any = { status: 'SCHEDULED' };
+    if (body.scheduledAt) {
+      update.scheduledAt = new Date(body.scheduledAt);
+      update.nextRunAt = new Date(body.scheduledAt);
+    }
+    if (body.cronExpr !== undefined) update.cronExpr = body.cronExpr;
+    if (body.timezone !== undefined) update.timezone = body.timezone;
+
+    return this.repo.update(id, update);
+  }
+
+  /** POST /api/v1/notifications/campaigns/:id/cancel — cancel */
+  @Post(':id/cancel')
+  async cancel(
+    @Headers('authorization') auth: string,
+    @Param('id') id: string,
+  ) {
+    this.requireAdmin(auth);
+    const updated = await this.repo.update(id, { status: 'CANCELLED' });
+    if (!updated) throw new NotFoundException('Campaign not found');
+    return updated;
+  }
+
+  /** DELETE /api/v1/notifications/campaigns/:id — delete DRAFT campaigns only */
+  @Delete(':id')
+  @HttpCode(HttpStatus.NO_CONTENT)
+  async remove(
+    @Headers('authorization') auth: string,
+    @Param('id') id: string,
+  ) {
+    this.requireAdmin(auth);
+    const campaign = await this.repo.findById(id);
+    if (!campaign) throw new NotFoundException('Campaign not found');
+    await this.repo.delete(id);
+  }
+
+  private requireAdmin(auth: string): { userId: string } {
+    if (!auth?.startsWith('Bearer ')) throw new UnauthorizedException('Missing authorization header');
+    const token = auth.slice(7);
+    try {
+      const payload = jwt.verify(token, process.env.JWT_SECRET || 'dev-secret') as any;
+      const roles: string[] = Array.isArray(payload.roles) ? payload.roles : [];
+      if (!roles.includes('platform_admin') && !roles.includes('platform_super_admin')) {
+        throw new UnauthorizedException('Admin role required');
+      }
+      return { userId: payload.sub };
+    } catch (err) {
+      if (err instanceof UnauthorizedException) throw err;
+      throw new UnauthorizedException('Invalid JWT');
+    }
+  }
+}
diff --git a/packages/services/notification-service/src/interfaces/rest/controllers/notification-admin.controller.ts b/packages/services/notification-service/src/interfaces/rest/controllers/notification-admin.controller.ts
new file mode 100644
index 0000000..309fbaf
--- /dev/null
+++ b/packages/services/notification-service/src/interfaces/rest/controllers/notification-admin.controller.ts
@@ -0,0 +1,150 @@
+import {
+  Controller,
+  Get,
+  Post,
+  Put,
+  Delete,
+  Param,
+  Body,
+  Query,
+  Headers,
+  UnauthorizedException,
+  NotFoundException,
+  ParseIntPipe,
+  DefaultValuePipe,
+  HttpCode,
+  HttpStatus,
+} from '@nestjs/common';
+import { NotificationRepository, CreateNotificationDto } from '../../../infrastructure/repositories/notification.repository';
+import * as jwt from 'jsonwebtoken';
+
+/**
+ * Platform-admin endpoints for managing notifications.
+ * Requires JWT with platform_admin or platform_super_admin role.
+ */
+@Controller('api/v1/notifications/admin')
+export class NotificationAdminController {
+  constructor(private readonly repo: NotificationRepository) {}
+
+  /** POST /api/v1/notifications/admin — create notification */
+  @Post()
+  async create(
+    @Headers('authorization') auth: string,
+    @Body() body: any,
+  ) {
+    const admin = this.requireAdmin(auth);
+    return this.repo.create({
+      title: body.title,
+      content: body.content,
+      type: body.type ?? 'ANNOUNCEMENT',
+      priority: body.priority ?? 'NORMAL',
+      targetType: body.targetType ?? 'ALL',
+      tenantIds: body.tenantIds,
+      userIds: body.userIds,
+      targetTagIds: body.targetTagIds,
+      targetTagLogic: body.targetTagLogic ?? 'ANY',
+      targetPlans: body.targetPlans,
+      targetStatuses: body.targetStatuses,
+      targetSegment: body.targetSegment ?? null,
+      channelKey: body.channelKey ?? null,
+      imageUrl: body.imageUrl ?? null,
+      linkUrl: body.linkUrl ?? null,
+      requiresForceRead: body.requiresForceRead ?? false,
+      isEnabled: body.isEnabled ?? true,
+      publishedAt: body.publishedAt ? new Date(body.publishedAt) : null,
+      expiresAt: body.expiresAt ? new Date(body.expiresAt) : null,
+      createdBy: admin.userId,
+    } as CreateNotificationDto);
+  }
+
+  /** GET /api/v1/notifications/admin — list all notifications */
+  @Get()
+  async list(
+    @Headers('authorization') auth: string,
+    @Query('type') type: string | undefined,
+    @Query('targetType') targetType: string | undefined,
+    @Query('limit', new DefaultValuePipe(50), ParseIntPipe) limit: number,
+    @Query('offset', new DefaultValuePipe(0), ParseIntPipe) offset: number,
+  ) {
+    this.requireAdmin(auth);
+    return this.repo.findAllAdmin({ type, targetType, limit: Math.min(limit, 200), offset });
+  }
+
+  /** GET /api/v1/notifications/admin/:id — get detail */
+  @Get(':id')
+  async getOne(
+    @Headers('authorization') auth: string,
+    @Param('id') id: string,
+  ) {
+    this.requireAdmin(auth);
+    const item = await this.repo.findById(id);
+    if (!item) throw new NotFoundException('Notification not found');
+    return item;
+  }
+
+  /** PUT /api/v1/notifications/admin/:id — update */
+  @Put(':id')
+  async update(
+    @Headers('authorization') auth: string,
+    @Param('id') id: string,
+    @Body() body: any,
+  ) {
+    this.requireAdmin(auth);
+    const dto: Partial<CreateNotificationDto> = {};
+    if (body.title !== undefined) dto.title = body.title;
+    if (body.content !== undefined) dto.content = body.content;
+    if (body.type !== undefined) dto.type = body.type;
+    if (body.priority !== undefined) dto.priority = body.priority;
+    if (body.targetType !== undefined) dto.targetType = body.targetType;
+    if (body.tenantIds !== undefined) dto.tenantIds = body.tenantIds;
+    if (body.userIds !== undefined) dto.userIds = body.userIds;
+    if (body.targetTagIds !== undefined) dto.targetTagIds = body.targetTagIds;
+    if (body.targetTagLogic !== undefined) dto.targetTagLogic = body.targetTagLogic;
+    if (body.targetPlans !== undefined) dto.targetPlans = body.targetPlans;
+    if (body.targetStatuses !== undefined) dto.targetStatuses = body.targetStatuses;
+    if (body.targetSegment !== undefined) dto.targetSegment = body.targetSegment;
+    if (body.channelKey !== undefined) dto.channelKey = body.channelKey;
+    if (body.imageUrl !== undefined) dto.imageUrl = body.imageUrl;
+    if (body.linkUrl !== undefined) dto.linkUrl = body.linkUrl;
+    if (body.requiresForceRead !== undefined) dto.requiresForceRead = body.requiresForceRead;
+    if (body.isEnabled !== undefined) dto.isEnabled = body.isEnabled;
+    if (body.publishedAt !== undefined) dto.publishedAt = body.publishedAt ? new Date(body.publishedAt) : null;
+    if (body.expiresAt !== undefined) dto.expiresAt = body.expiresAt ? new Date(body.expiresAt) : null;
+
+    const updated = await this.repo.update(id, dto);
+    if (!updated) throw new NotFoundException('Notification not found');
+    return updated;
+  }
+
+  /** DELETE /api/v1/notifications/admin/:id */
+  @Delete(':id')
+  @HttpCode(HttpStatus.NO_CONTENT)
+  async remove(
+    @Headers('authorization') auth: string,
+    @Param('id') id: string,
+  ) {
+    this.requireAdmin(auth);
+    const item = await this.repo.findById(id);
+    if (!item) throw new NotFoundException('Notification not found');
+    await this.repo.delete(id);
+  }
+
+  private requireAdmin(auth: string): { userId: string } {
+    if (!auth?.startsWith('Bearer ')) {
+      throw new UnauthorizedException('Missing authorization header');
+    }
+    const token = auth.slice(7);
+    const secret = process.env.JWT_SECRET || 'dev-secret';
+    try {
+      const payload = jwt.verify(token, secret) as any;
+      const roles: string[] = Array.isArray(payload.roles) ? payload.roles : [];
+      if (!roles.includes('platform_admin') && !roles.includes('platform_super_admin')) {
+        throw new UnauthorizedException('Admin role required');
+      }
+      return { userId: payload.sub };
+    } catch (err) {
+      if (err instanceof UnauthorizedException) throw err;
+      throw new UnauthorizedException('Invalid JWT');
+    }
+  }
+}
diff --git a/packages/services/notification-service/src/interfaces/rest/controllers/notification-channel.controller.ts b/packages/services/notification-service/src/interfaces/rest/controllers/notification-channel.controller.ts
new file mode 100644
index 0000000..dec137c
--- /dev/null
+++ b/packages/services/notification-service/src/interfaces/rest/controllers/notification-channel.controller.ts
@@ -0,0 +1,133 @@
+import {
+  Controller,
+  Get,
+  Post,
+  Put,
+  Delete,
+  Param,
+  Body,
+  Headers,
+  UnauthorizedException,
+  NotFoundException,
+  BadRequestException,
+  HttpCode,
+  HttpStatus,
+} from '@nestjs/common';
+import { ChannelRepository } from '../../../infrastructure/repositories/channel.repository';
+import * as jwt from 'jsonwebtoken';
+
+/**
+ * Notification channel management.
+ * Admin endpoints: POST/PUT/DELETE require platform_admin role.
+ * Public GET (list channels) is accessible to any authenticated user (for preferences UI).
+ */
+@Controller('api/v1/notifications/channels')
+export class NotificationChannelController {
+  constructor(private readonly repo: ChannelRepository) {}
+
+  /** GET /api/v1/notifications/channels — list all enabled channels */
+  @Get()
+  async listChannels(@Headers('authorization') auth: string) {
+    this.extractUser(auth); // any valid JWT
+    return this.repo.listChannels();
+  }
+
+  /** POST /api/v1/notifications/channels — create channel (admin only) */
+  @Post()
+  async createChannel(
+    @Headers('authorization') auth: string,
+    @Body() body: { channelKey: string; name: string; description?: string; isMandatory?: boolean },
+  ) {
+    this.requireAdmin(auth);
+    if (!body.channelKey?.match(/^[a-z0-9_]+$/)) {
+      throw new BadRequestException('channelKey must be lowercase alphanumeric with underscores');
+    }
+    return this.repo.createChannel(body);
+  }
+
+  /** PUT /api/v1/notifications/channels/:key — update channel (admin only) */
+  @Put(':key')
+  async updateChannel(
+    @Headers('authorization') auth: string,
+    @Param('key') key: string,
+    @Body() body: { name?: string; description?: string; isMandatory?: boolean; isEnabled?: boolean },
+  ) {
+    this.requireAdmin(auth);
+    const result = await this.repo.updateChannel(key, body);
+    if (!result) throw new NotFoundException('Channel not found');
+    return result;
+  }
+
+  /** DELETE /api/v1/notifications/channels/:key — delete channel (admin only) */
+  @Delete(':key')
+  @HttpCode(HttpStatus.NO_CONTENT)
+  async deleteChannel(
+    @Headers('authorization') auth: string,
+    @Param('key') key: string,
+  ) {
+    this.requireAdmin(auth);
+    await this.repo.deleteChannel(key);
+  }
+
+  // ── User preferences ──────────────────────────────────────────────────────
+
+  /** GET /api/v1/notifications/channels/me/preferences */
+  @Get('me/preferences')
+  async getMyPreferences(@Headers('authorization') auth: string) {
+    const { userId } = this.extractUser(auth);
+    return this.repo.getUserPreferences(userId);
+  }
+
+  /** PUT /api/v1/notifications/channels/me/preferences — bulk update user preferences */
+  @Put('me/preferences')
+  async updateMyPreferences(
+    @Headers('authorization') auth: string,
+    @Body() body: { preferences: { channelKey: string; enabled: boolean }[] },
+  ) {
+    const { userId } = this.extractUser(auth);
+    await this.repo.setAllUserPreferences(userId, body.preferences ?? []);
+    return { ok: true };
+  }
+
+  /** PUT /api/v1/notifications/channels/me/preferences/:key — update single preference */
+  @Put('me/preferences/:key')
+  async updateOnePreference(
+    @Headers('authorization') auth: string,
+    @Param('key') key: string,
+    @Body() body: { enabled: boolean },
+  ) {
+    const { userId } = this.extractUser(auth);
+    try {
+      await this.repo.setUserPreference(userId, key, body.enabled);
+    } catch (e: any) {
+      throw new BadRequestException(e.message);
+    }
+    return { ok: true };
+  }
+
+  private extractUser(auth: string): { userId: string } {
+    if (!auth?.startsWith('Bearer ')) throw new UnauthorizedException('Missing authorization header');
+    const token = auth.slice(7);
+    try {
+      const payload = jwt.verify(token, process.env.JWT_SECRET || 'dev-secret') as any;
+      return { userId: payload.sub };
+    } catch {
+      throw new UnauthorizedException('Invalid JWT');
+    }
+  }
+
+  private requireAdmin(auth: string): void {
+    if (!auth?.startsWith('Bearer ')) throw new UnauthorizedException('Missing authorization header');
+    const token = auth.slice(7);
+    try {
+      const payload = jwt.verify(token, process.env.JWT_SECRET || 'dev-secret') as any;
+      const roles: string[] = Array.isArray(payload.roles) ? payload.roles : [];
+      if (!roles.includes('platform_admin') && !roles.includes('platform_super_admin')) {
+        throw new UnauthorizedException('Admin role required');
+      }
+    } catch (err) {
+      if (err instanceof UnauthorizedException) throw err;
+      throw new UnauthorizedException('Invalid JWT');
+    }
+  }
+}
diff --git a/packages/services/notification-service/src/interfaces/rest/controllers/notification-user.controller.ts b/packages/services/notification-service/src/interfaces/rest/controllers/notification-user.controller.ts
new file mode 100644
index 0000000..f57ca6c
--- /dev/null
+++ b/packages/services/notification-service/src/interfaces/rest/controllers/notification-user.controller.ts
@@ -0,0 +1,73 @@
+import {
+  Controller,
+  Get,
+  Post,
+  Body,
+  Query,
+  Headers,
+  UnauthorizedException,
+  ParseIntPipe,
+  DefaultValuePipe,
+} from '@nestjs/common';
+import { NotificationRepository } from '../../../infrastructure/repositories/notification.repository';
+import * as jwt from 'jsonwebtoken';
+
+/**
+ * User-facing notification endpoints.
+ * Kong enforces JWT — we extract tenantId/userId from Authorization header.
+ */
+@Controller('api/v1/notifications')
+export class NotificationUserController {
+  constructor(private readonly repo: NotificationRepository) {}
+
+  /** GET /api/v1/notifications/me — notifications visible to this user */
+  @Get('me')
+  async getMyNotifications(
+    @Headers('authorization') auth: string,
+    @Query('limit', new DefaultValuePipe(50), ParseIntPipe) limit: number,
+    @Query('offset', new DefaultValuePipe(0), ParseIntPipe) offset: number,
+  ) {
+    const { tenantId, userId } = this.extractJwt(auth);
+    return this.repo.findForUser({ tenantId, userId, limit: Math.min(limit, 100), offset });
+  }
+
+  /** GET /api/v1/notifications/me/unread-count */
+  @Get('me/unread-count')
+  async getUnreadCount(@Headers('authorization') auth: string) {
+    const { tenantId, userId } = this.extractJwt(auth);
+    const count = await this.repo.getUnreadCount(tenantId, userId);
+    return { count };
+  }
+
+  /**
+   * POST /api/v1/notifications/me/mark-read
+   * Body: { notificationId?: string }  — omit to mark ALL as read
+   */
+  @Post('me/mark-read')
+  async markRead(
+    @Headers('authorization') auth: string,
+    @Body() body: { notificationId?: string },
+  ) {
+    const { tenantId, userId } = this.extractJwt(auth);
+    if (body?.notificationId) {
+      await this.repo.markRead(body.notificationId, userId, tenantId);
+    } else {
+      await this.repo.markAllRead(tenantId, userId);
+    }
+    return { ok: true };
+  }
+
+  private extractJwt(auth: string): { tenantId: string; userId: string } {
+    if (!auth?.startsWith('Bearer ')) {
+      throw new UnauthorizedException('Missing authorization header');
+    }
+    const token = auth.slice(7);
+    const secret = process.env.JWT_SECRET || 'dev-secret';
+    try {
+      const payload = jwt.verify(token, secret) as any;
+      return { tenantId: payload.tenantId, userId: payload.sub };
+    } catch {
+      throw new UnauthorizedException('Invalid JWT');
+    }
+  }
+}
diff --git a/packages/services/notification-service/src/interfaces/rest/controllers/segment-admin.controller.ts b/packages/services/notification-service/src/interfaces/rest/controllers/segment-admin.controller.ts
new file mode 100644
index 0000000..e4103d2
--- /dev/null
+++ b/packages/services/notification-service/src/interfaces/rest/controllers/segment-admin.controller.ts
@@ -0,0 +1,110 @@
+import {
+  Controller,
+  Get,
+  Post,
+  Delete,
+  Param,
+  Body,
+  Query,
+  Headers,
+  UnauthorizedException,
+  ParseIntPipe,
+  DefaultValuePipe,
+  HttpCode,
+  HttpStatus,
+} from '@nestjs/common';
+import { SegmentRepository } from '../../../infrastructure/repositories/segment.repository';
+import * as jwt from 'jsonwebtoken';
+
+/**
+ * Platform-admin Segment management endpoints.
+ * Segments are pre-defined audience groups that can be used for BY_SEGMENT targeting.
+ *
+ * Platform admins manually or via ETL populate segment membership.
+ * Common segments: trial_ending_soon, high_value, at_risk, new_users, etc.
+ */
+@Controller('api/v1/notifications/segments')
+export class SegmentAdminController {
+  constructor(private readonly repo: SegmentRepository) {}
+
+  /** GET /api/v1/notifications/segments — list all segments with member counts */
+  @Get()
+  async listSegments(@Headers('authorization') auth: string) {
+    this.requireAdmin(auth);
+    return this.repo.listSegments();
+  }
+
+  /** GET /api/v1/notifications/segments/:key/members — paginated member list */
+  @Get(':key/members')
+  async getMembers(
+    @Headers('authorization') auth: string,
+    @Param('key') key: string,
+    @Query('limit', new DefaultValuePipe(50), ParseIntPipe) limit: number,
+    @Query('offset', new DefaultValuePipe(0), ParseIntPipe) offset: number,
+  ) {
+    this.requireAdmin(auth);
+    return this.repo.getSegmentMembers(key, Math.min(limit, 500), offset);
+  }
+
+  /** POST /api/v1/notifications/segments/:key/sync — replace entire segment (bulk ETL) */
+  @Post(':key/sync')
+  async syncSegment(
+    @Headers('authorization') auth: string,
+    @Param('key') key: string,
+    @Body() body: { tenantIds: string[] },
+  ) {
+    this.requireAdmin(auth);
+    await this.repo.syncSegment(key, body.tenantIds ?? []);
+    return { ok: true, count: body.tenantIds?.length ?? 0 };
+  }
+
+  /** POST /api/v1/notifications/segments/:key/add — add tenants to segment */
+  @Post(':key/add')
+  async addToSegment(
+    @Headers('authorization') auth: string,
+    @Param('key') key: string,
+    @Body() body: { tenantIds: string[] },
+  ) {
+    this.requireAdmin(auth);
+    await this.repo.addToSegment(key, body.tenantIds ?? []);
+    return { ok: true };
+  }
+
+  /** POST /api/v1/notifications/segments/:key/remove — remove tenants from segment */
+  @Post(':key/remove')
+  async removeFromSegment(
+    @Headers('authorization') auth: string,
+    @Param('key') key: string,
+    @Body() body: { tenantIds: string[] },
+  ) {
+    this.requireAdmin(auth);
+    await this.repo.removeFromSegment(key, body.tenantIds ?? []);
+    return { ok: true };
+  }
+
+  /** DELETE /api/v1/notifications/segments/:key — delete entire segment */
+  @Delete(':key')
+  @HttpCode(HttpStatus.NO_CONTENT)
+  async deleteSegment(
+    @Headers('authorization') auth: string,
+    @Param('key') key: string,
+  ) {
+    this.requireAdmin(auth);
+    await this.repo.deleteSegment(key);
+  }
+
+  private requireAdmin(auth: string): void {
+    if (!auth?.startsWith('Bearer ')) throw new UnauthorizedException('Missing authorization header');
+    const token = auth.slice(7);
+    try {
+      const payload = jwt.verify(token, process.env.JWT_SECRET || 'dev-secret') as any;
+      const roles: string[] = Array.isArray(payload.roles) ? payload.roles : [];
+      if (!roles.includes('platform_admin') && !roles.includes('platform_super_admin')) {
+        throw new UnauthorizedException('Admin role required');
+      }
+    } catch (err) {
+      if (err instanceof UnauthorizedException) throw err;
+      throw new UnauthorizedException('Invalid JWT');
+    }
+  }
+}
diff --git a/packages/services/notification-service/src/main.ts b/packages/services/notification-service/src/main.ts
new file mode 100644
index 0000000..0f1f945
--- /dev/null
+++ b/packages/services/notification-service/src/main.ts
@@ -0,0 +1,30 @@
+import { NestFactory } from '@nestjs/core';
+import { Logger } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import { NotificationModule } from './notification.module';
+
+const logger = new Logger('NotificationService');
+
+process.on('unhandledRejection', (reason) => {
+  logger.error(`Unhandled Rejection: ${reason}`);
+});
+process.on('uncaughtException', (error) => {
+  logger.error(`Uncaught Exception: ${error.message}`, error.stack);
+});
+
+async function bootstrap() {
+  const app = await NestFactory.create(NotificationModule);
+
+  const config = app.get(ConfigService);
+  const port = config.get<number>('NOTIFICATION_SERVICE_PORT', 3013);
+
+  app.enableCors();
+
+  await app.listen(port);
+  logger.log(`notification-service running on port ${port}`);
+}
+
+bootstrap().catch((err) => {
+  logger.error(`Failed to start notification-service: ${err.message}`, err.stack);
+  process.exit(1);
+});
diff --git a/packages/services/notification-service/src/notification.module.ts b/packages/services/notification-service/src/notification.module.ts
new file mode 100644
index 0000000..5568fa8
--- /dev/null
+++ b/packages/services/notification-service/src/notification.module.ts
@@ -0,0 +1,48 @@
+import { Module } from '@nestjs/common';
+import { ConfigModule } from '@nestjs/config';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { DatabaseModule } from '@it0/database';
+
+// Domain Entities
+import { Notification } from './domain/entities/notification.entity';
+import { NotificationRead } from './domain/entities/notification-read.entity';
+import { NotificationTenantTarget } from './domain/entities/notification-tenant-target.entity';
+
+// Infrastructure
+import { NotificationRepository } from './infrastructure/repositories/notification.repository';
+import { ChannelRepository } from './infrastructure/repositories/channel.repository';
+import { CampaignRepository } from './infrastructure/repositories/campaign.repository';
+import { SegmentRepository } from './infrastructure/repositories/segment.repository';
+
+// Application Services
+import { EventTriggerService } from './application/services/event-trigger.service';
+
+// Controllers
+import { NotificationAdminController } from './interfaces/rest/controllers/notification-admin.controller';
+import { NotificationUserController } from './interfaces/rest/controllers/notification-user.controller';
+import { NotificationChannelController } from './interfaces/rest/controllers/notification-channel.controller';
+import { CampaignAdminController } from './interfaces/rest/controllers/campaign-admin.controller';
+import { SegmentAdminController } from './interfaces/rest/controllers/segment-admin.controller';
+
+@Module({
+  imports: [
+    ConfigModule.forRoot({ isGlobal: true }),
+    DatabaseModule.forRoot(),
+    TypeOrmModule.forFeature([Notification, NotificationRead, NotificationTenantTarget]),
+  ],
+  controllers: [
+    NotificationAdminController,
+    NotificationUserController,
+    NotificationChannelController,
+    CampaignAdminController,
+    SegmentAdminController,
+  ],
+  providers: [
+    NotificationRepository,
+    ChannelRepository,
+    CampaignRepository,
+    SegmentRepository,
+    EventTriggerService,
+  ],
+})
+export class NotificationModule {}
diff --git a/packages/services/notification-service/tsconfig.json b/packages/services/notification-service/tsconfig.json
new file mode 100644
index 0000000..cc51a7c
--- /dev/null
+++ b/packages/services/notification-service/tsconfig.json
@@ -0,0 +1,20 @@
+{
+  "extends": "../../../tsconfig.base.json",
+  "compilerOptions": {
+    "outDir": "./dist",
+    "baseUrl": ".",
+    "strictNullChecks": false,
+    "noImplicitAny": false,
+    "strictBindCallApply": false,
+    "strictPropertyInitialization": false,
+    "useUnknownInCatchVariables": false,
+    "paths": {
+      "@it0/common": ["../../shared/common/src"],
+      "@it0/common/*": ["../../shared/common/src/*"],
+      "@it0/database": ["../../shared/database/src"],
+      "@it0/database/*": ["../../shared/database/src/*"]
+    }
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist", "test"]
+}
diff --git a/packages/shared/database/migrations/007-create-notification-tables.sql b/packages/shared/database/migrations/007-create-notification-tables.sql
new file mode 100644
index 0000000..d068153
--- /dev/null
+++ b/packages/shared/database/migrations/007-create-notification-tables.sql
@@ -0,0 +1,55 @@
+-- ============================================================
+-- Migration 007: Notification System Tables
+-- All tables in public schema (platform-wide, cross-tenant)
+-- ============================================================
+
+-- 1. Notifications — created & managed by platform admins
+CREATE TABLE IF NOT EXISTS public.notifications (
+  id                  UUID         PRIMARY KEY DEFAULT gen_random_uuid(),
+  title               VARCHAR(200) NOT NULL,
+  content             TEXT         NOT NULL,
+  type                VARCHAR(30)  NOT NULL DEFAULT 'ANNOUNCEMENT',
+  -- SYSTEM | MAINTENANCE | FEATURE | ANNOUNCEMENT | BILLING | SECURITY
+  priority            VARCHAR(20)  NOT NULL DEFAULT 'NORMAL',
+  -- LOW | NORMAL | HIGH | URGENT
+  target_type         VARCHAR(20)  NOT NULL DEFAULT 'ALL',
+  -- ALL | SPECIFIC_TENANTS
+  image_url           VARCHAR(500),
+  link_url            VARCHAR(500),
+  requires_force_read BOOLEAN      NOT NULL DEFAULT false,
+  is_enabled          BOOLEAN      NOT NULL DEFAULT true,
+  published_at        TIMESTAMPTZ,          -- NULL = draft (not yet published)
+  expires_at          TIMESTAMPTZ,          -- NULL = never expires
+  created_by          VARCHAR(100),
+  created_at          TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+  updated_at          TIMESTAMPTZ  NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_notifications_type       ON public.notifications (type);
+CREATE INDEX IF NOT EXISTS idx_notifications_enabled    ON public.notifications (is_enabled);
+CREATE INDEX IF NOT EXISTS idx_notifications_published  ON public.notifications (published_at);
+CREATE INDEX IF NOT EXISTS idx_notifications_target     ON public.notifications (target_type);
+
+-- 2. Notification reads — tracks per-user read status
+CREATE TABLE IF NOT EXISTS public.notification_reads (
+  id              UUID        PRIMARY KEY DEFAULT gen_random_uuid(),
+  notification_id UUID        NOT NULL REFERENCES public.notifications(id) ON DELETE CASCADE,
+  user_id         VARCHAR(100) NOT NULL,
+  tenant_id       VARCHAR(100) NOT NULL,
+  read_at         TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  UNIQUE (notification_id, user_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_notification_reads_user   ON public.notification_reads (user_id);
+CREATE INDEX IF NOT EXISTS idx_notification_reads_notif  ON public.notification_reads (notification_id);
+CREATE INDEX IF NOT EXISTS idx_notification_reads_tenant ON public.notification_reads (tenant_id);
+
+-- 3. Notification tenant targets — for SPECIFIC_TENANTS targeting
+CREATE TABLE IF NOT EXISTS public.notification_tenant_targets (
+  id              UUID        PRIMARY KEY DEFAULT gen_random_uuid(),
+  notification_id UUID        NOT NULL REFERENCES public.notifications(id) ON DELETE CASCADE,
+  tenant_id       VARCHAR(100) NOT NULL
+);
+
+CREATE INDEX IF NOT EXISTS idx_notif_tenant_targets_notif  ON public.notification_tenant_targets (notification_id);
+CREATE INDEX IF NOT EXISTS idx_notif_tenant_targets_tenant ON public.notification_tenant_targets (tenant_id);
diff --git a/packages/shared/database/migrations/008-create-tenant-tags.sql b/packages/shared/database/migrations/008-create-tenant-tags.sql
new file mode 100644
index 0000000..4fb1f64
--- /dev/null
+++ b/packages/shared/database/migrations/008-create-tenant-tags.sql
@@ -0,0 +1,55 @@
+-- ============================================================
+-- Migration 008: Tenant Tag System + Notification Targeting Extensions
+-- Phase 1: Precision push targeting foundation
+-- ============================================================
+
+-- 1. Tenant tag definitions (platform-level, managed by platform admins)
+CREATE TABLE IF NOT EXISTS public.tenant_tags (
+  id          UUID         PRIMARY KEY DEFAULT gen_random_uuid(),
+  name        VARCHAR(50)  NOT NULL UNIQUE,   -- e.g. "高价值客户", "试用期", "即将流失"
+  color       VARCHAR(20)  NOT NULL DEFAULT '#6366F1',
+  description TEXT,
+  created_by  VARCHAR(100),
+  created_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+  updated_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW()
+);
+
+-- 2. Tenant ← → Tag assignments
+CREATE TABLE IF NOT EXISTS public.tenant_tag_assignments (
+  tenant_id  VARCHAR(100) NOT NULL,
+  tag_id     UUID         NOT NULL REFERENCES public.tenant_tags(id) ON DELETE CASCADE,
+  tagged_by  VARCHAR(100),
+  tagged_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+  PRIMARY KEY (tenant_id, tag_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_tta_tenant ON public.tenant_tag_assignments (tenant_id);
+CREATE INDEX IF NOT EXISTS idx_tta_tag    ON public.tenant_tag_assignments (tag_id);
+
+-- 3. Notification user-level targets (for SPECIFIC_USERS targeting)
+CREATE TABLE IF NOT EXISTS public.notification_user_targets (
+  id              UUID         PRIMARY KEY DEFAULT gen_random_uuid(),
+  notification_id UUID         NOT NULL REFERENCES public.notifications(id) ON DELETE CASCADE,
+  user_id         VARCHAR(100) NOT NULL
+);
+
+CREATE INDEX IF NOT EXISTS idx_notif_user_targets_notif ON public.notification_user_targets (notification_id);
+CREATE INDEX IF NOT EXISTS idx_notif_user_targets_user  ON public.notification_user_targets (user_id);
+
+-- 4. Extend notifications table with new targeting columns
+ALTER TABLE public.notifications
+  ADD COLUMN IF NOT EXISTS target_tag_ids  UUID[]   DEFAULT NULL,
+  -- Tag IDs for BY_TENANT_TAG targeting
+  ADD COLUMN IF NOT EXISTS target_tag_logic VARCHAR(3) DEFAULT 'ANY',
+  -- ANY: tenant has at least one tag; ALL: tenant has all tags
+  ADD COLUMN IF NOT EXISTS target_plans    TEXT[]   DEFAULT NULL,
+  -- ['free','pro','enterprise'] for BY_PLAN targeting
+  ADD COLUMN IF NOT EXISTS target_statuses TEXT[]   DEFAULT NULL,
+  -- ['active','suspended'] for BY_TENANT_STATUS targeting
+  ADD COLUMN IF NOT EXISTS channel_key     VARCHAR(50) DEFAULT NULL;
+  -- References notification_channels.key (Phase 2, nullable for now)
+
+-- 5. Extended TargetType values (documentation via check constraint)
+-- Existing: ALL, SPECIFIC_TENANTS
+-- New: BY_TENANT_TAG, BY_PLAN, BY_TENANT_STATUS, SPECIFIC_USERS
+-- Note: constraint not enforced to allow backward compat; validated in service layer
diff --git a/packages/shared/database/migrations/009-create-notification-channels.sql b/packages/shared/database/migrations/009-create-notification-channels.sql
new file mode 100644
index 0000000..cb34200
--- /dev/null
+++ b/packages/shared/database/migrations/009-create-notification-channels.sql
@@ -0,0 +1,53 @@
+-- ============================================================
+-- Migration 009: Notification Channels + User Preferences
+-- Phase 2: Channel-based opt-out system
+-- ============================================================
+
+-- 1. Notification channels (platform-managed)
+--    Platform defines channels like "billing", "security", "marketing"
+--    Users can opt out of non-mandatory channels
+CREATE TABLE IF NOT EXISTS public.notification_channels (
+  channel_key  VARCHAR(50)  PRIMARY KEY,
+  name         VARCHAR(100) NOT NULL,
+  description  TEXT,
+  is_mandatory BOOLEAN      NOT NULL DEFAULT false,
+  -- mandatory=true: users cannot opt out (e.g. security alerts)
+  -- mandatory=false: users can disable (e.g. marketing)
+  is_enabled   BOOLEAN      NOT NULL DEFAULT true,
+  created_at   TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+  updated_at   TIMESTAMPTZ  NOT NULL DEFAULT NOW()
+);
+
+-- Seed default channels
+INSERT INTO public.notification_channels (channel_key, name, description, is_mandatory) VALUES
+  ('system',       '系统通知',     '平台级系统公告与维护通知', true),
+  ('security',     '安全告警',     '账号安全、异常登录等安全相关通知', true),
+  ('billing',      '账单通知',     '订阅续费、发票、扣款通知', false),
+  ('feature',      '新功能',       '产品新功能与版本更新通知', false),
+  ('marketing',    '营销推广',     '促销活动、优惠券、活动邀请', false),
+  ('ops',          '运维报警',     '服务器异常、告警触发通知', false)
+ON CONFLICT (channel_key) DO NOTHING;
+
+-- 2. User notification preferences (per-user opt-out per channel)
+--    Only non-mandatory channels can be opted out
+CREATE TABLE IF NOT EXISTS public.user_notification_preferences (
+  user_id     VARCHAR(100) NOT NULL,
+  channel_key VARCHAR(50)  NOT NULL REFERENCES public.notification_channels(channel_key) ON DELETE CASCADE,
+  enabled     BOOLEAN      NOT NULL DEFAULT true,
+  updated_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+  PRIMARY KEY (user_id, channel_key)
+);
+
+CREATE INDEX IF NOT EXISTS idx_unp_user ON public.user_notification_preferences (user_id);
+
+-- 3. Notification segment members (for BY_SEGMENT targeting, Phase 4)
+--    Platform populates this table via ETL/cron jobs
+CREATE TABLE IF NOT EXISTS public.notification_segment_members (
+  segment_key VARCHAR(100) NOT NULL,
+  tenant_id   VARCHAR(100) NOT NULL,
+  synced_at   TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+  PRIMARY KEY (segment_key, tenant_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_nsm_segment ON public.notification_segment_members (segment_key);
+CREATE INDEX IF NOT EXISTS idx_nsm_tenant  ON public.notification_segment_members (tenant_id);
diff --git a/packages/shared/database/migrations/010-create-notification-campaigns.sql b/packages/shared/database/migrations/010-create-notification-campaigns.sql
new file mode 100644
index 0000000..9fc1965
--- /dev/null
+++ b/packages/shared/database/migrations/010-create-notification-campaigns.sql
@@ -0,0 +1,77 @@
+-- ============================================================
+-- Migration 010: Notification Campaigns + Read Event Log
+-- Phase 3: Campaign scheduling + analytics
+-- ============================================================
+
+-- 1. Notification campaigns
+--    A campaign is a scheduled or recurring notification push job
+CREATE TABLE IF NOT EXISTS public.notification_campaigns (
+  id             UUID         PRIMARY KEY DEFAULT gen_random_uuid(),
+  name           VARCHAR(200) NOT NULL,
+  description    TEXT,
+  status         VARCHAR(20)  NOT NULL DEFAULT 'DRAFT',
+  -- DRAFT | SCHEDULED | RUNNING | COMPLETED | CANCELLED | FAILED
+
+  -- Linked notification template (optional: can create ad-hoc body)
+  notification_id UUID        REFERENCES public.notifications(id) ON DELETE SET NULL,
+
+  -- Schedule
+  schedule_type  VARCHAR(20)  NOT NULL DEFAULT 'ONCE',
+  -- ONCE | RECURRING
+  scheduled_at   TIMESTAMPTZ,          -- for ONCE: exact send time
+  cron_expr      VARCHAR(100),          -- for RECURRING: cron expression
+  timezone       VARCHAR(50)  NOT NULL DEFAULT 'UTC',
+  next_run_at    TIMESTAMPTZ,           -- computed by scheduler
+  last_run_at    TIMESTAMPTZ,
+
+  -- Execution stats
+  target_count   INT          NOT NULL DEFAULT 0,   -- estimated / actual target size
+  sent_count     INT          NOT NULL DEFAULT 0,
+  read_count     INT          NOT NULL DEFAULT 0,
+
+  created_by     VARCHAR(100),
+  created_at     TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+  updated_at     TIMESTAMPTZ  NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_campaigns_status       ON public.notification_campaigns (status);
+CREATE INDEX IF NOT EXISTS idx_campaigns_scheduled_at ON public.notification_campaigns (scheduled_at)
+  WHERE status IN ('SCHEDULED', 'RUNNING');
+CREATE INDEX IF NOT EXISTS idx_campaigns_next_run     ON public.notification_campaigns (next_run_at)
+  WHERE status = 'SCHEDULED';
+
+-- 2. Campaign execution log
+--    Records each run of a campaign (for RECURRING campaigns, one row per run)
+CREATE TABLE IF NOT EXISTS public.campaign_execution_log (
+  id             UUID         PRIMARY KEY DEFAULT gen_random_uuid(),
+  campaign_id    UUID         NOT NULL REFERENCES public.notification_campaigns(id) ON DELETE CASCADE,
+  notification_id UUID        REFERENCES public.notifications(id) ON DELETE SET NULL,
+  started_at     TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+  finished_at    TIMESTAMPTZ,
+  status         VARCHAR(20)  NOT NULL DEFAULT 'RUNNING',
+  -- RUNNING | COMPLETED | FAILED
+  target_count   INT          NOT NULL DEFAULT 0,
+  sent_count     INT          NOT NULL DEFAULT 0,
+  error          TEXT
+);
+
+CREATE INDEX IF NOT EXISTS idx_cel_campaign ON public.campaign_execution_log (campaign_id);
+
+-- 3. Notification delivery event log
+--    Detailed per-notification read events (for analytics / funnel)
+CREATE TABLE IF NOT EXISTS public.notification_event_log (
+  id               UUID         PRIMARY KEY DEFAULT gen_random_uuid(),
+  notification_id  UUID         NOT NULL REFERENCES public.notifications(id) ON DELETE CASCADE,
+  campaign_id      UUID         REFERENCES public.notification_campaigns(id) ON DELETE SET NULL,
+  event_type       VARCHAR(30)  NOT NULL,
+  -- DELIVERED | READ | CLICKED | DISMISSED
+  user_id          VARCHAR(100) NOT NULL,
+  tenant_id        VARCHAR(100) NOT NULL,
+  occurred_at      TIMESTAMPTZ  NOT NULL DEFAULT NOW(),
+  metadata         JSONB        DEFAULT '{}'::jsonb
+);
+
+CREATE INDEX IF NOT EXISTS idx_nel_notification ON public.notification_event_log (notification_id);
+CREATE INDEX IF NOT EXISTS idx_nel_campaign     ON public.notification_event_log (campaign_id) WHERE campaign_id IS NOT NULL;
+CREATE INDEX IF NOT EXISTS idx_nel_user         ON public.notification_event_log (user_id);
+CREATE INDEX IF NOT EXISTS idx_nel_occurred     ON public.notification_event_log (occurred_at);