fix(planting): 修复认种页面动态定价不生效 + 添加涨价倒计时

- 修复 admin-service PublicTreePricingController 路由双重前缀问题
  (@Controller('api/v1/tree-pricing') → @Controller('tree-pricing'))
- Kong 网关新增 /api/v1/tree-pricing 路由到 admin-service
- mobile-app 认种页面添加涨价倒计时功能：
  显示"距下次涨价还有 X天 X小时 X分钟"及涨价后价格

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/api-gateway/kong.yml

@@ -240,6 +240,10 @@ services:
         paths:
           - /api/v1/customer-service-contacts
         strip_path: false
+      - name: admin-tree-pricing-public
+        paths:
+          - /api/v1/tree-pricing
+        strip_path: false
 
   # ---------------------------------------------------------------------------
   # Presence Service - 在线状态服务

backend/services/admin-service/src/pricing/tree-pricing.controller.ts

@@ -96,7 +96,7 @@ export class AdminTreePricingController {
  * 不需要管理员认证
  */
 @ApiTags('认种定价配置-公开API')
-@Controller('api/v1/tree-pricing')
+@Controller('tree-pricing')
 export class PublicTreePricingController {
   constructor(
     private readonly pricingService: TreePricingService,

frontend/mobile-app/lib/features/planting/presentation/pages/planting_quantity_page.dart

@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
@@ -47,6 +48,12 @@ class _PlantingQuantityPageState extends ConsumerState<PlantingQuantityPage> {
   /// 是否显示超出警告
   bool _showExceedWarning = false;
 
+  /// 涨价倒计时 timer
+  Timer? _priceCountdownTimer;
+
+  /// 距下次涨价的剩余时间
+  Duration _timeUntilIncrease = Duration.zero;
+
   @override
   void initState() {
     super.initState();
@@ -65,6 +72,7 @@ class _PlantingQuantityPageState extends ConsumerState<PlantingQuantityPage> {
           _pricingConfig = config;
           _pricePerTree = config.totalPrice.toDouble();
         });
+        _startPriceCountdown();
         debugPrint('[PlantingQuantity] 动态定价: ${config.totalPrice} USDT/棵 (supplement=${config.currentSupplement})');
       }
     } catch (e) {
@@ -75,12 +83,40 @@ class _PlantingQuantityPageState extends ConsumerState<PlantingQuantityPage> {
 
   @override
   void dispose() {
+    _priceCountdownTimer?.cancel();
     _quantityController.removeListener(_onQuantityChanged);
     _quantityController.dispose();
     _quantityFocusNode.dispose();
     super.dispose();
   }
 
+  /// 启动涨价倒计时
+  void _startPriceCountdown() {
+    _priceCountdownTimer?.cancel();
+    final config = _pricingConfig;
+    if (config == null || !config.autoIncreaseEnabled || config.nextAutoIncreaseAt == null) {
+      return;
+    }
+    _updateCountdown();
+    _priceCountdownTimer = Timer.periodic(const Duration(minutes: 1), (_) {
+      _updateCountdown();
+    });
+  }
+
+  void _updateCountdown() {
+    final nextAt = _pricingConfig?.nextAutoIncreaseAt;
+    if (nextAt == null) return;
+    final remaining = nextAt.difference(DateTime.now());
+    if (mounted) {
+      setState(() {
+        _timeUntilIncrease = remaining.isNegative ? Duration.zero : remaining;
+      });
+    }
+    if (remaining.isNegative) {
+      _priceCountdownTimer?.cancel();
+    }
+  }
+
   /// 输入框数量变化监听
   void _onQuantityChanged() {
     final text = _quantityController.text;
@@ -707,31 +743,39 @@ class _PlantingQuantityPageState extends ConsumerState<PlantingQuantityPage> {
               color: Color(0xFF000000),
             ),
           ),
-          // 下次涨价预告
+          // 下次涨价倒计时预告
           if (_pricingConfig != null &&
               _pricingConfig!.autoIncreaseEnabled &&
               _pricingConfig!.nextAutoIncreaseAt != null) ...[
             const SizedBox(height: 12),
             Container(
-              padding: const EdgeInsets.all(10),
+              padding: const EdgeInsets.all(12),
               decoration: BoxDecoration(
                 color: const Color(0xFFFFF3E0),
                 borderRadius: BorderRadius.circular(8),
+                border: Border.all(color: const Color(0xFFFFCC80), width: 0.5),
               ),
-              child: Row(
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  // 倒计时行
+                  Row(
                     children: [
                       const Icon(
-                    Icons.trending_up,
+                        Icons.timer_outlined,
                         color: Color(0xFFE65100),
                         size: 18,
                       ),
-                  const SizedBox(width: 8),
+                      const SizedBox(width: 6),
                       Expanded(
                         child: Text(
-                      '预计涨价: ${_pricingConfig!.nextAutoIncreaseAt!.month}月${_pricingConfig!.nextAutoIncreaseAt!.day}日后每棵 +${_pricingConfig!.autoIncreaseAmount} 绿积分',
+                          _timeUntilIncrease == Duration.zero
+                              ? '涨价时间已到，价格即将更新'
+                              : '距下次涨价还有 ${_timeUntilIncrease.inDays}天 ${_timeUntilIncrease.inHours % 24}小时 ${_timeUntilIncrease.inMinutes % 60}分钟',
                           style: const TextStyle(
-                        fontSize: 13,
+                            fontSize: 14,
                             fontFamily: 'Inter',
+                            fontWeight: FontWeight.w600,
                             height: 1.4,
                             color: Color(0xFFE65100),
                           ),
@@ -739,6 +783,31 @@ class _PlantingQuantityPageState extends ConsumerState<PlantingQuantityPage> {
                       ),
                     ],
                   ),
+                  const SizedBox(height: 6),
+                  // 涨价后价格
+                  Row(
+                    children: [
+                      const Icon(
+                        Icons.trending_up,
+                        color: Color(0xFFE65100),
+                        size: 16,
+                      ),
+                      const SizedBox(width: 6),
+                      Expanded(
+                        child: Text(
+                          '涨价后每棵: ${(_pricingConfig!.totalPrice + _pricingConfig!.autoIncreaseAmount).toInt()} 绿积分 (+${_pricingConfig!.autoIncreaseAmount.toInt()})',
+                          style: const TextStyle(
+                            fontSize: 13,
+                            fontFamily: 'Inter',
+                            height: 1.4,
+                            color: Color(0xFFBF360C),
+                          ),
+                        ),
+                      ),
+                    ],
+                  ),
+                ],
+              ),
             ),
           ],
         ],