fix(api): keep unknown repair on AI diagnosis

apps/api/src/services/failure_watcher.py

@@ -509,9 +509,9 @@ class FailureWatcherService(IFailureWatcher):
             "NETWORK_ERROR": "檢查網路連線，驗證 DNS 解析",
             "PERMISSION_DENIED": "檢查 RBAC 權限配置",
             "RESOURCE_ERROR": "增加資源配額或清理資源",
-            "UNKNOWN": "AI 深度診斷：補抓 timeline / log / metric / PlayBook 相似案例，人工安全閘門接手",
+            "UNKNOWN": "AI 深度診斷：補抓 timeline / log / metric / PlayBook 相似案例",
         }
-        return suggestions.get(classification, "AI 深度診斷：人工安全閘門接手")
+        return suggestions.get(classification, "AI 深度診斷")
 
     async def _check_repair_cooldown(
         self,

apps/api/tests/test_failure_watcher.py

@@ -164,7 +164,7 @@ class TestRepairSuggestion:
     def test_suggest_unknown_repair(self):
         """測試未知錯誤修復建議"""
         result = self.service._suggest_repair("UNKNOWN")
-        assert "人工" in result
+        assert "AI 深度診斷" in result
 
 
 class TestSeverityMapping: