完善后台任务中心历史摘要视图

- 为系统任务和插件调度补充批量历史摘要查询，支持最近成功时间、最近失败原因与累计成功失败次数

- 任务列表接口合并内存运行态与数据库日志态，服务重启后后台仍可回看最近执行结果

- 系统任务页与插件调度页新增健康状态、历史执行摘要与插件调度快捷启停入口

- 更新工程优化文档，记录 7.3 第一阶段当前进展

utils/plugin_schedule_manager.py

@@ -209,6 +209,47 @@ class PluginScheduleManager:
             return False
         return latest_log_at < (expected_at - timedelta(seconds=self._compensation_tolerance_seconds))
 
+    @staticmethod
+    def _build_schedule_health_status(
+        *,
+        enabled: bool,
+        running: bool,
+        last_status: str,
+        latest_success_at,
+        latest_failure_summary: str,
+    ) -> str:
+        """根据调度任务运行态和历史态生成后台健康标签。"""
+        if not enabled:
+            return "disabled"
+        if running:
+            return "running"
+        # 只有“最近一次执行仍是失败”时才把健康态打成 failed，
+        # 避免历史上曾失败过、但后面已经恢复成功的任务一直显示异常。
+        if str(last_status or "").strip().lower() == "failed":
+            return "failed"
+        if latest_success_at or str(last_status or "").strip().lower() == "success":
+            return "healthy"
+        if str(latest_failure_summary or "").strip():
+            return "degraded"
+        return "idle"
+
+    @staticmethod
+    def _build_schedule_health_message(*, health_status: str, latest_success_at, latest_failure_summary: str) -> str:
+        """生成调度任务列表里展示的简短健康说明。"""
+        if health_status == "disabled":
+            return "任务已停用"
+        if health_status == "running":
+            return "任务正在执行中"
+        if health_status in ("failed", "degraded"):
+            return str(latest_failure_summary or "最近存在失败记录").strip()
+        if health_status == "healthy":
+            if isinstance(latest_success_at, datetime):
+                return f"最近成功于 {latest_success_at.strftime('%Y-%m-%d %H:%M:%S')}"
+            if latest_success_at:
+                return f"最近成功于 {latest_success_at}"
+            return "任务近期执行正常"
+        return "暂无执行记录"
+
     async def _run_one_schedule(self, schedule_row: Dict[str, Any]) -> Dict[str, Any]:
         schedule_id = int(schedule_row["id"])
         action_key = schedule_row.get("action_key")
@@ -297,6 +338,7 @@ class PluginScheduleManager:
         # 日志兜底：进程重启后内存态 last_run_at 会丢失，任务页需要从数据库最新日志恢复显示。
         schedule_ids = [int(row.get("id")) for row in db_rows if row.get("id") is not None]
         latest_log_by_schedule = self.db.get_latest_logs_map(schedule_ids)
+        history_summary_by_schedule = self.db.get_schedule_history_summary_map(schedule_ids)
 
         data = []
         for row in db_rows:
@@ -304,6 +346,7 @@ class PluginScheduleManager:
             key = f"plugin_schedule:{schedule_id}"
             runtime = runtime_by_key.get(key, {})
             latest_log = latest_log_by_schedule.get(schedule_id) or {}
+            history_summary = history_summary_by_schedule.get(schedule_id) or {}
             merged = dict(row)
             merged["runtime_job_id"] = runtime.get("id")
             merged["running"] = runtime.get("running", False)
@@ -319,6 +362,24 @@ class PluginScheduleManager:
             merged["run_count"] = runtime.get("run_count", 0)
             merged["success_count"] = runtime.get("success_count", 0)
             merged["fail_count"] = runtime.get("fail_count", 0)
+            merged["latest_success_at"] = history_summary.get("latest_success_at")
+            merged["latest_failed_at"] = history_summary.get("latest_failed_at")
+            merged["latest_failure_summary"] = str(history_summary.get("latest_failure_summary") or "").strip()
+            merged["history_success_count"] = int(history_summary.get("history_success_count", 0) or 0)
+            merged["history_fail_count"] = int(history_summary.get("history_fail_count", 0) or 0)
+            merged["history_total_count"] = int(history_summary.get("history_total_count", 0) or 0)
+            merged["health_status"] = self._build_schedule_health_status(
+                enabled=bool(row.get("enabled", 0)),
+                running=bool(runtime.get("running", False)),
+                last_status=str(merged.get("last_status") or ""),
+                latest_success_at=history_summary.get("latest_success_at"),
+                latest_failure_summary=str(history_summary.get("latest_failure_summary") or ""),
+            )
+            merged["health_message"] = self._build_schedule_health_message(
+                health_status=merged["health_status"],
+                latest_success_at=history_summary.get("latest_success_at"),
+                latest_failure_summary=str(history_summary.get("latest_failure_summary") or ""),
+            )
             data.append(merged)
         return data