fix: resolve test compilation errors and restore upstream VERSION

- Add missing interface methods to test stubs (RemoveGroupFromUserAllowedGroups,
  GetNotifyCodeUserRate, IncrNotifyCodeUserRate, UpdateGroupIDByUserAndGroup)
- Fix NewUserService call signatures (add 4th param)
- Fix GetAccountCount return signature (3 values)
- Update api_contract_test.go snapshots for balance_notify fields
- Restore resolveOpenAIMessagesDispatchMappedModel function
- Reset VERSION to upstream 0.1.112

backend/internal/server/api_contract_test.go

@@ -58,6 +58,11 @@ func TestAPIContracts(t *testing.T) {
 					"allowed_groups": null,
 					"created_at": "2025-01-02T03:04:05Z",
 					"updated_at": "2025-01-02T03:04:05Z",
+					"balance_notify_enabled": false,
+					"balance_notify_threshold_type": "",
+					"balance_notify_threshold": null,
+					"balance_notify_extra_emails": null,
+					"total_recharged": 0,
 					"run_mode": "standard"
 				}
 			}`,
@@ -606,7 +611,12 @@ func TestAPIContracts(t *testing.T) {
 					"payment_cancel_rate_limit_max": 0,
 					"payment_cancel_rate_limit_window": 0,
 					"payment_cancel_rate_limit_unit": "",
-					"payment_cancel_rate_limit_window_mode": ""
+					"payment_cancel_rate_limit_window_mode": "",
+					"balance_low_notify_enabled": false,
+					"account_quota_notify_enabled": false,
+					"balance_low_notify_threshold": 0,
+					"balance_low_notify_recharge_url": "",
+					"account_quota_notify_emails": []
 				}
 			}`,
 		},
@@ -699,7 +709,7 @@ func newContractDeps(t *testing.T) *contractDeps {
 		RunMode: config.RunModeStandard,
 	}
 
-	userService := service.NewUserService(userRepo, nil, nil)
+	userService := service.NewUserService(userRepo, nil, nil, nil)
 	apiKeyService := service.NewAPIKeyService(apiKeyRepo, userRepo, groupRepo, userSubRepo, nil, apiKeyCache, cfg)
 
 	usageRepo := newStubUsageLogRepo()

backend/internal/server/middleware/admin_auth_test.go

@@ -39,7 +39,7 @@ func TestAdminAuthJWTValidatesTokenVersion(t *testing.T) {
 			return &clone, nil
 		},
 	}
-	userService := service.NewUserService(userRepo, nil, nil)
+	userService := service.NewUserService(userRepo, nil, nil, nil)
 
 	router := gin.New()
 	router.Use(gin.HandlerFunc(NewAdminAuthMiddleware(authService, userService, nil)))

backend/internal/server/middleware/jwt_auth_test.go

@@ -41,7 +41,7 @@ func newJWTTestEnv(users map[int64]*service.User) (*gin.Engine, *service.AuthSer
 
 	userRepo := &stubJWTUserRepo{users: users}
 	authSvc := service.NewAuthService(nil, userRepo, nil, nil, cfg, nil, nil, nil, nil, nil, nil)
-	userSvc := service.NewUserService(userRepo, nil, nil)
+	userSvc := service.NewUserService(userRepo, nil, nil, nil)
 	mw := NewJWTAuthMiddleware(authSvc, userSvc)
 
 	r := gin.New()