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hailin 9ed80cd0bc feat: implement complete commercial monetization loop (Phases 1-4) 
## Phase 1 - Token Metering + Quota Enforcement

### Usage Tracking
- agent-service: add UsageRecord entity (per-tenant schema) tracking
  inputTokens/outputTokens/costUsd per AI task
- Modify all 3 AI engines (claude-api, claude-code-cli, claude-agent-sdk)
  to emit separate input/output token counts in the `completed` event
- claude-api-engine: costUsd = (input*3 + output*15) / 1,000,000
  (claude-sonnet-4-5 pricing: $3/MTok in, $15/MTok out)
- agent.controller: persist UsageRecord and publish `usage.recorded`
  event to Redis Streams on every task completion (non-blocking)
- shared/events: new events UsageRecordedEvent, SubscriptionChangedEvent,
  QuotaExceededEvent, PaymentReceivedEvent

### Quota Enforcement
- TenantInfo: add maxServers, maxUsers, maxStandingOrders,
  maxAgentTokensPerMonth fields
- TenantContextMiddleware: rewritten to query public.tenants table for
  real quota values; 5-min in-memory cache; plan-based fallback on error
- TenantContextService: getTenant() returns null instead of throwing;
  added getTenantOrThrow() for strict callers
- inventory-service/server.controller: 429 when maxServers exceeded
- ops-service/standing-order.controller: 429 when maxStandingOrders exceeded
- auth-service/auth.service: 429 when maxUsers exceeded
- 002-create-tenant-schema-template.sql: add usage_records table

## Phase 2 - billing-service (New Microservice, port 3010)

### Domain Layer (public schema, all UUIDs)
Entities: Plan, Subscription, Invoice, InvoiceItem, Payment, PaymentMethod,
UsageAggregate

Domain services:
- SubscriptionLifecycleService: full state machine (trialing -> active ->
  past_due -> cancelled/expired); upgrades immediate, downgrades at period end
- InvoiceGeneratorService: monthly invoice = base fee + overage charges;
  proration item for mid-cycle upgrades
- OverageCalculatorService: (totalTokens - includedTokens) * overageRate

### Infrastructure (all repos use DataSource directly, NOT TenantAwareRepository)
- PlanRepository, SubscriptionRepository, InvoiceRepository (atomic
  transaction for invoice+items), PaymentRepository (payments + methods),
  UsageAggregateRepository (UPSERT via ON CONFLICT for atomic accumulation)

### Application Use Cases
- CreateSubscriptionUseCase: called on tenant registration
- ChangePlanUseCase: upgrade (immediate + proration) or downgrade (scheduled)
- CancelSubscriptionUseCase: immediate or at-period-end
- GenerateMonthlyInvoiceUseCase: cron target (1st of month 00:05 UTC);
  generates invoices, renews periods, applies scheduled downgrades
- AggregateUsageUseCase: Redis Streams consumer group billing-service,
  upserts monthly usage aggregates from usage.recorded events
- CheckTokenQuotaUseCase: hard limit enforcement per plan
- CreatePaymentSessionUseCase + HandlePaymentWebhookUseCase

### REST API
- GET  /api/v1/billing/plans
- GET/POST /api/v1/billing/subscription (+ /upgrade, /cancel)
- GET  /api/v1/billing/invoices (paginated)
- GET  /api/v1/billing/invoices/:id
- POST /api/v1/billing/invoices/:id/pay
- GET  /api/v1/billing/usage/current + /history
- CRUD /api/v1/billing/payment-methods
- POST /api/v1/billing/webhooks/{stripe,alipay,wechat,crypto}

### Plan Seed (auto on startup via PlanSeedService)
- free:       $0/mo,    100K tokens,  no overage,  hard limit 100%
- pro:        $49.99/mo, 1M tokens,  $8/MTok,  hard limit 150%
- enterprise: $199.99/mo, 10M tokens, $5/MTok, no hard limit

## Phase 3 - Payment Provider Integration

### PaymentProviderRegistry (Strategy Pattern, mirrors EngineRegistry)
All providers use @Optional() injection; unconfigured providers omitted

- StripeProvider: PaymentIntent API; webhook via stripe.webhooks.constructEvent
- AlipayProvider: alipay-sdk; Native QR (precreate); RSA2 signature verify
- WeChatPayProvider: v3 REST; Native Pay code_url; AES-256-GCM decrypt;
  HMAC-SHA256 request signing and webhook verification
- CryptoProvider: Coinbase Commerce; hosted checkout; HMAC-SHA256 verify

### WebhookController
All 4 webhook endpoints are public (no JWT) for payment provider callbacks.
rawBody: true enabled in main.ts for signature verification.

## Infrastructure Changes
- docker-compose.yml: billing-service container (port 13010);
  added as dependency of api-gateway
- kong.yml: /api/v1/billing routes (JWT); /api/v1/billing/webhooks (public)
- 005-create-billing-tables.sql: 7 billing tables + invoice sequence +
  ALTER tenants to add quota columns
- run-migrations.ts: 005 runs as part of shared schema step

## Phase 4 - Frontend

### Web Admin (Next.js)
New pages:
- /billing: subscription card + token usage bar + warning banner + invoices
- /billing/plans: comparison grid with USD/CNY toggle + upgrade/downgrade flow
- /billing/invoices: paginated table with Pay Now button
Sidebar: Billing group (CreditCard icon, 3 sub-items)
i18n: billing keys added to en + zh sidebar translations

### Flutter App
New feature module it0_app/lib/features/billing/:
- BillingOverviewPage: plan card + token LinearProgressIndicator +
  latest invoice + upgrade button
- BillingProvider (FutureProvider): parallel fetch subscription/quota/invoice
Settings page: "订阅与用量" entry card
Router: /settings/billing sub-route

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-03-03 21:09:17 -08:00
hailin f6dffe02c5 feat: add version-service for IT0 App version management 
New NestJS microservice (port 3009) providing complete version management
API for IT0 App, designed to integrate with the existing mobile-upgrade
frontend (update.szaiai.com).

Backend — packages/services/version-service/ (9 new files):
- AppVersion entity: platform (ANDROID/IOS), versionName, buildNumber,
  changelog, downloadUrl, fileSize, isForceUpdate, isEnabled, minOsVersion
- REST controller with 8 endpoints:
  GET/POST /api/v1/versions — list (with platform/disabled filters) & create
  GET/PUT/DELETE /api/v1/versions/:id — single CRUD
  PATCH /api/v1/versions/:id/toggle — enable/disable
  POST /api/v1/versions/upload — multipart APK/IPA upload (500MB limit)
  POST /api/v1/versions/parse — extract version info from APK/IPA
- File storage: /data/versions/{platform}/ via Docker volume
- APK/IPA parsing: app-info-parser package
- Database: public.app_versions table (non-tenant, platform-level)
- No JWT auth (internal version management, consistent with existing apps)

Infrastructure changes:
- Dockerfile.service: added version-service package.json COPY lines
- docker-compose.yml: version-service container (13009:3009), version_data
  volume, api-gateway depends_on
- kong.yml: version-service route (/api/v1/versions), CORS origin for
  update.szaiai.com (mobile-upgrade frontend domain)

Deployment note: nginx needs /downloads/versions/ location + client_max_body_size 500m

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-03-03 07:48:31 -08:00
hailin 6e832c7615 feat: add voice I/O test page in Flutter settings 
- TTS: text input → Kokoro synthesis → audio playback
- STT: long-press record → faster-whisper transcription
- Round-trip: record → STT → TTS → playback
- Added /api/v1/test route to Kong gateway for voice-service
- Accessible from Settings → 语音 I/O 测试

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-02-24 05:16:10 -08:00
hailin 6cd53e713c fix: bypass JWT for voice WebSocket route (fixes 401 on WS upgrade) 
根因：Kong 日志显示 voice WebSocket 连接被 JWT 插件返回 401，
因为 WebSocket RFC 6455 不支持自定义 header，Flutter 的
WebSocketChannel.connect 无法携带 Authorization header。

修复策略（业界标准做法）：
1. Kong: 将 voice-service 的 JWT 从 service 级别改为 route
   级别，仅在 voice-api 和 twilio-webhook 路由启用 JWT，
   voice-ws 路由免除（session 创建已通过 JWT 验证，
   session_id 本身作为认证凭据）
2. 后端: session_router 返回的 websocket_url 改为
   /ws/voice/{session_id}（匹配 Kong voice-ws 路由路径）
3. FastAPI: 在 app 级别增加 /ws/voice/{session_id} 顶级
   WebSocket 路由，委托给 session_router 的 handler

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-02-23 21:30:11 -08:00
hailin 5f827b0961 fix: revert ws/wss protocols - Kong OSS handles WS over http/https 
Kong 3.7 OSS doesn't support ws/wss protocol identifiers (Enterprise only).
WebSocket upgrades are handled transparently over http/https protocols.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-02-23 17:02:53 -08:00
hailin 86d7cac631 fix: replace Socket.IO with raw WebSocket to fix 502 on /ws/agent 
Socket.IO requires its own handshake protocol (EIO=4) which Kong cannot
proxy as a plain WebSocket upgrade, causing 502 Bad Gateway. Switch to
@nestjs/platform-ws (WsAdapter) with manual session room tracking so
Flutter's IOWebSocketChannel can connect directly.

Also add ws/wss protocols to Kong WebSocket routes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-02-23 16:52:43 -08:00
hailin 3816d6841d fix: add users endpoint, admin route, and fix agent-config paths 
- Add UsersController to auth-service for user CRUD (GET/POST/PUT/DELETE /api/v1/auth/users)
- Add Kong route /api/v1/admin -> auth-service for tenant management
- Remove AuthGuard from TenantController (Kong handles JWT)
- Fix frontend agent-config API paths from /api/v1/agent/config to /api/v1/agent-config

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-02-22 00:35:57 -08:00
hailin f393a07092 fix: correct alert-rules API paths and remove audit ACL plugin 
- Frontend alert-rules paths changed from /monitoring/alert-rules to
  /monitor/alerts/rules to match backend routes
- Removed Kong ACL plugin on audit-routes (JWT auth is sufficient)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-02-22 00:21:50 -08:00
hailin c710303b60 fix: per-service JWT in Kong, fix auth-service tenant-aware repos 
- Replace global JWT plugin with per-service JWT (skip auth-service)
  to fix auth routes being blocked by global JWT in DB-less mode
- Fix UserRepository and ApiKeyRepository to use standard TypeORM
  instead of TenantAwareRepository (users are global, not per-schema)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-02-21 23:31:32 -08:00
hailin 48e47975ca fix: configure Kong JWT auth flow with consumer credentials 
- Add kid claim to auth-service JWT for Kong validation
- Add Kong consumer with JWT credential (shared secret via env)
- Add agent-config route to Kong for /api/v1/agent-config
- Kong Dockerfile uses entrypoint script to inject JWT_SECRET at runtime
- Fix frontend login path (/auth/login → /api/v1/auth/login)
- Extract tenantId from JWT on login and store as current_tenant
- Add auth guard in admin layout (redirect to /login if no token)
- Pass JWT_SECRET env var to Kong container in docker-compose

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-02-21 23:20:06 -08:00
hailin e5dcfa6113 feat: configure it0.szaiai.com and it0api.szaiai.com domains 
- Update Kong CORS origins to allow it0.szaiai.com
- Update WebSocket URL to wss://it0api.szaiai.com
- Fix proxy route to read API_BASE_URL at request time
  (was being inlined at build time by Next.js standalone)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-02-21 22:54:17 -08:00
hailin 39718a9a09 fix: resolve runtime errors for NestJS, Kong, and voice-service 
- Dockerfile.service: fix entry point path (dist/services/{name}/src/main)
  due to tsconfig paths widening rootDir during compilation
- Kong config: remove unsupported ws/wss protocols (WebSocket works
  automatically over http/https in Kong 3.7)
- voice-service: fix pipecat import path for v0.0.30 API
  (pipecat.transports.network.websocket_server with lowercase class names)
- voice-service: add openai dependency required by pipecat anthropic service

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-02-19 19:00:03 -08:00
hailin 00f8801d51 Initial commit: IT0 AI-powered server cluster operations platform 
Full-stack monorepo with DDD + Clean Architecture:
- Backend: 7 NestJS microservices + 5 shared libraries (TypeScript)
- Mobile: Flutter app with Riverpod (Dart)
- Web Admin: Next.js dashboard with Zustand + React Query
- Voice: Python voice service (STT/TTS/VAD)
- Infra: Docker Compose, K8s manifests, Turborepo build

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-02-08 22:54:37 -08:00