fix: Sentinel WebUI — 合并为单页面(仪表盘+节点管理Tab)

插件 Web 页面 key 必须匹配 plugin_name (/plugin/sentinel)
改为单页面 Tab 切换: 仪表盘 + 节点管理

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

plugins/sentinel/__init__.py

@@ -47,15 +47,11 @@ class Plugin(PluginWebMixin):
         except Exception as e:
             logger.warning(f"Sentinel network skip: {e}")
 
-        # 注册 WebUI 页面
-        for fid, title, fname in [
-            ("sentinel_dash", "🛡️ Sentinel", "dashboard.html"),
-            ("sentinel_cfg", "🛡️ 节点管理", "settings.html"),
-        ]:
-            p = os.path.join(os.path.dirname(__file__), fname)
-            if os.path.exists(p):
-                with open(p) as f:
-                    self.register_web_page(fid, title, f.read(), icon="S" if "dash" in fid else "⚙")
+        # 注册 WebUI 页面 (key 必须匹配 plugin_name 才能在侧边栏访问)
+        dash_path = os.path.join(os.path.dirname(__file__), "dashboard.html")
+        if os.path.exists(dash_path):
+            with open(dash_path) as f:
+                self.register_web_page("sentinel", "🛡️ Sentinel", f.read(), icon="S")
 
         # 注册 API 路由
         if self.network_bridge: