fix(frontend): 修正权益金额显示与后端实际配置一致

- 省团队权益: 10 → 20 USDT
- 市区域权益: 20 → 35 USDT
- 省区域权益: 10 → 15 USDT

权益金额配置参考 reward-service/prisma/seed.ts

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/mobile-app/lib/features/profile/presentation/pages/profile_page.dart

@@ -1156,7 +1156,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
               initialTarget: _authProvinceCompanyInitialTarget,
               monthlyTarget: _authProvinceCompanyMonthlyTarget,
               monthIndex: _authProvinceCompanyMonthIndex,
-              rewardDescription: '每新增认种 1 棵可获得 10 USDT',
+              rewardDescription: '每新增认种 1 棵可获得 20 USDT',
             ),
           ],
           // 市区域权益考核
@@ -1170,7 +1170,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
               initialTarget: _cityCompanyInitialTarget,
               monthlyTarget: _cityCompanyMonthlyTarget,
               monthIndex: _cityCompanyMonthIndex,
-              rewardDescription: '每新增认种 1 棵可获得 20 USDT',
+              rewardDescription: '每新增认种 1 棵可获得 35 USDT',
             ),
           ],
           // 省区域权益考核
@@ -1184,7 +1184,7 @@ class _ProfilePageState extends ConsumerState<ProfilePage> {
               initialTarget: _provinceCompanyInitialTarget,
               monthlyTarget: _provinceCompanyMonthlyTarget,
               monthIndex: _provinceCompanyMonthIndex,
-              rewardDescription: '每新增认种 1 棵可获得 10 USDT',
+              rewardDescription: '每新增认种 1 棵可获得 15 USDT',
             ),
           ],
           const SizedBox(height: 16),