feat: 插件管理 — 导入安装 + 统计面板

新增 API:
- GET /api/plugins/stats — 统计 (总计/已启用/已停用/安装失败)
- POST /api/plugins/import — ZIP上传 或 Git clone 安装
  - 自动 pip install -r requirements.txt (子进程隔离)
  - 自动加载插件 (isolated 模式, 崩溃不影响框架)
  - 安装失败记录到 _IMPORT_FAILS

前端:
- 横版统计卡片 (总数/启用/停用/失败)
- ZIP 上传按钮 + Git URL 输入
- 安装状态实时反馈

安全:
- 所有端点 panel_auth 保护
- 子进程安装 (pip/git), 超时120s
- 仅接受 .zip 文件
- 目录冲突检测

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

config/permissions/pending_requests.json

@@ -350,5 +350,93 @@
       "framework.command.execute"
     ],
     "timestamp": 28375.089465424
+  },
+  "47fa9916": {
+    "plugin_name": "example_plugin",
+    "permissions": [
+      "plugin.example.read",
+      "plugin.example.write",
+      "plugin.example.execute",
+      "framework.event.subscribe",
+      "framework.command.execute"
+    ],
+    "timestamp": 28527.781918439
+  },
+  "6b69ef4a": {
+    "plugin_name": "sentinel",
+    "permissions": [
+      "plugin.sentinel.read",
+      "plugin.sentinel.write",
+      "plugin.network.access",
+      "framework.event.subscribe",
+      "framework.command.execute"
+    ],
+    "timestamp": 28527.793469637
+  },
+  "5521ab41": {
+    "plugin_name": "example_plugin",
+    "permissions": [
+      "plugin.example.read",
+      "plugin.example.write",
+      "plugin.example.execute",
+      "framework.event.subscribe",
+      "framework.command.execute"
+    ],
+    "timestamp": 29038.232790171
+  },
+  "7da234f7": {
+    "plugin_name": "sentinel",
+    "permissions": [
+      "plugin.sentinel.read",
+      "plugin.sentinel.write",
+      "plugin.network.access",
+      "framework.event.subscribe",
+      "framework.command.execute"
+    ],
+    "timestamp": 29038.243362099
+  },
+  "08edc191": {
+    "plugin_name": "example_plugin",
+    "permissions": [
+      "plugin.example.read",
+      "plugin.example.write",
+      "plugin.example.execute",
+      "framework.event.subscribe",
+      "framework.command.execute"
+    ],
+    "timestamp": 29064.774713547
+  },
+  "afbc57ca": {
+    "plugin_name": "sentinel",
+    "permissions": [
+      "plugin.sentinel.read",
+      "plugin.sentinel.write",
+      "plugin.network.access",
+      "framework.event.subscribe",
+      "framework.command.execute"
+    ],
+    "timestamp": 29064.880357453
+  },
+  "8b057650": {
+    "plugin_name": "example_plugin",
+    "permissions": [
+      "plugin.example.read",
+      "plugin.example.write",
+      "plugin.example.execute",
+      "framework.event.subscribe",
+      "framework.command.execute"
+    ],
+    "timestamp": 29119.623393265
+  },
+  "46de40e2": {
+    "plugin_name": "sentinel",
+    "permissions": [
+      "plugin.sentinel.read",
+      "plugin.sentinel.write",
+      "plugin.network.access",
+      "framework.event.subscribe",
+      "framework.command.execute"
+    ],
+    "timestamp": 29119.62760988
   }
 }

config/plugins/commands.yaml

@@ -101,7 +101,7 @@ commands:
     permissions:
     - framework.command.test
     source: internal
-last_updated: 28375.06993407
+last_updated: 29119.596258526
 plugin_commands:
   example_plugin:
     echo: *id001

config/services/network_routes.yaml

@@ -1,5 +1,5 @@
 http_port: 4200
-last_updated: 28375.086802768
+last_updated: 29119.62443889
 plugin_routes:
   example_plugin:
   - methods: