fix: 修复contribution-service路由映射

- Kong: /api/v2/contribution -> /api/v1/contributions (strip_path)
- mining-app: 添加/accounts前缀匹配controller路径

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

backend/api-gateway/kong.yml

@@ -277,18 +277,19 @@ services:
 
   # ---------------------------------------------------------------------------
   # Contribution Service 2.0 - 算力服务
+  # 服务使用 /api/v1/contributions 前缀
   # ---------------------------------------------------------------------------
   - name: contribution-service-v2
-    url: http://192.168.1.111:3020
+    url: http://192.168.1.111:3020/api/v1/contributions
     routes:
       - name: contribution-v2-api
         paths:
           - /api/v2/contribution
-        strip_path: false
+        strip_path: true
       - name: contribution-v2-health
         paths:
           - /api/v2/contribution/health
-        strip_path: false
+        strip_path: true
 
   # ---------------------------------------------------------------------------
   # Mining Service 2.0 - 挖矿服务

frontend/mining-app/lib/core/network/api_endpoints.dart

@@ -34,9 +34,9 @@ class ApiEndpoints {
   static String transfer(String accountSequence) =>
       '/api/v2/trading/accounts/$accountSequence/transfer';
 
-  // Contribution Service 2.0 (Kong路由: /api/v2/contribution)
+  // Contribution Service 2.0 (Kong路由: /api/v2/contribution -> /api/v1/contributions)
   static String contribution(String accountSequence) =>
-      '/api/v2/contribution/$accountSequence';
+      '/api/v2/contribution/accounts/$accountSequence';
   static String contributionRecords(String accountSequence) =>
-      '/api/v2/contribution/$accountSequence/records';
+      '/api/v2/contribution/accounts/$accountSequence/records';
 }