feat(api): Phase 13.2 #80 Kubernetes MCP Tool real implementation

- Integrate real ActionExecutor instead of mock responses
- kubectl_get: Execute real kubectl get with JSON output
- kubectl_delete: Dry-run validation + actual pod deletion
- kubectl_scale: Real kubectl scale command
- kubectl_restart: Deployment rollout restart with validation
- Database query placeholder for #81

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

apps/api/src/plugins/mcp/mcp_bridge.py

@@ -305,6 +305,19 @@ class MCPBridge:
                     },
                     server_name=server.name,
                 ),
+                MCPTool(
+                    name="kubectl_restart",
+                    description="Restart Kubernetes deployment (rollout restart)",
+                    input_schema={
+                        "type": "object",
+                        "properties": {
+                            "deployment": {"type": "string"},
+                            "namespace": {"type": "string"},
+                        },
+                        "required": ["deployment"],
+                    },
+                    server_name=server.name,
+                ),
             ],
             "database": [
                 MCPTool(
@@ -465,18 +478,112 @@ class MCPBridge:
         tool_name: str,
         parameters: dict[str, Any],
     ) -> Any:
-        """HTTP 方式執行工具 (Mock 實作)"""
-        # Phase 3: Mock 執行，實際連接待 MCP Server 部署
-        logger.info(f"[MOCK] HTTP call to {server.endpoint}: {tool_name}({parameters})")
+        """
+        HTTP 方式執行工具
 
-        # 模擬不同工具的回傳
-        mock_responses = {
-            "kubectl_get": {"items": [{"name": "pod-1"}, {"name": "pod-2"}]},
-            "kubectl_delete": {"deleted": True, "resource": parameters.get("name")},
-            "kubectl_scale": {"scaled": True, "replicas": parameters.get("replicas")},
-            "query": {"rows": [], "affected": 0},
-        }
-        return mock_responses.get(tool_name, {"status": "ok"})
+        Phase 13.2: 整合真實 K8s Executor (不再是 Mock)
+        """
+        # =============================================
+        # Kubernetes: 使用真實 ActionExecutor
+        # =============================================
+        if server.name == "kubernetes":
+            from src.services.executor import get_executor
+
+            executor = get_executor()
+
+            if tool_name == "kubectl_get":
+                # 使用 kubectl 指令查詢
+                namespace = parameters.get("namespace", "awoooi-prod")
+                resource = parameters.get("resource", "pods")
+                name = parameters.get("name", "")
+                cmd = f"kubectl get {resource} {name} -n {namespace} -o json".strip()
+                result = await executor.execute_kubectl_command(cmd)
+                if result.success and result.k8s_response:
+                    return result.k8s_response.get("stdout", "")
+                return {"error": result.error}
+
+            elif tool_name == "kubectl_delete":
+                namespace = parameters.get("namespace", "awoooi-prod")
+                resource = parameters.get("resource", "pod")
+                name = parameters.get("name", "")
+                if not name:
+                    return {"error": "Missing 'name' parameter"}
+
+                # Dry-run 驗證
+                if resource == "pod":
+                    dry_run = await executor.validate_pod_exists(name, namespace)
+                else:
+                    dry_run = await executor.validate_deployment_exists(name, namespace)
+
+                if not dry_run.passed:
+                    return {"error": dry_run.message, "dry_run": False}
+
+                # 執行刪除
+                if resource == "pod":
+                    result = await executor.delete_pod(name, namespace)
+                else:
+                    # deployment 不支援直接刪除，改用 restart
+                    return {"error": "Direct deployment deletion not supported, use restart"}
+
+                return {
+                    "success": result.success,
+                    "message": result.message,
+                    "duration_ms": result.duration_ms,
+                }
+
+            elif tool_name == "kubectl_scale":
+                namespace = parameters.get("namespace", "awoooi-prod")
+                deployment = parameters.get("deployment", "")
+                replicas = parameters.get("replicas", 1)
+                if not deployment:
+                    return {"error": "Missing 'deployment' parameter"}
+
+                cmd = f"kubectl scale deployment/{deployment} --replicas={replicas} -n {namespace}"
+                result = await executor.execute_kubectl_command(cmd)
+                return {
+                    "success": result.success,
+                    "scaled": result.success,
+                    "replicas": replicas,
+                    "message": result.message,
+                }
+
+            elif tool_name == "kubectl_restart":
+                namespace = parameters.get("namespace", "awoooi-prod")
+                deployment = parameters.get("deployment", "")
+                if not deployment:
+                    return {"error": "Missing 'deployment' parameter"}
+
+                dry_run = await executor.validate_deployment_exists(deployment, namespace)
+                if not dry_run.passed:
+                    return {"error": dry_run.message, "dry_run": False}
+
+                result = await executor.restart_deployment(deployment, namespace)
+                return {
+                    "success": result.success,
+                    "restarted": result.success,
+                    "message": result.message,
+                    "duration_ms": result.duration_ms,
+                }
+
+            else:
+                return {"error": f"Unknown kubernetes tool: {tool_name}"}
+
+        # =============================================
+        # Database: 查詢 incident/approval 歷史 (Phase 13.2 #81)
+        # =============================================
+        elif server.name == "database":
+            if tool_name == "query":
+                # TODO: 整合真實 PostgreSQL 查詢
+                logger.info(f"[TODO] Database query: {parameters.get('sql', '')[:50]}")
+                return {"rows": [], "affected": 0, "note": "Phase 13.2 #81 待實作"}
+            else:
+                return {"error": f"Unknown database tool: {tool_name}"}
+
+        # =============================================
+        # Mock fallback
+        # =============================================
+        logger.info(f"[MOCK] HTTP call to {server.endpoint}: {tool_name}")
+        return {"status": "ok", "mock": True}
 
     async def _execute_stdio(
         self,