Initial commit: TaskPool React panel

- React frontend with route-level code splitting
- Backend rebranded from Baihu to TaskPool
- DB brand migration script and local compatibility

web/public/manifest.webmanifest

@@ -0,0 +1,24 @@
+{
+  "name": "任务池",
+  "short_name": "TaskPool",
+  "description": "轻量高性能自动化任务调度平台",
+  "start_url": "/",
+  "display": "standalone",
+  "background_color": "#0d0d0d",
+  "theme_color": "#0d0d0d",
+  "lang": "zh-CN",
+  "icons": [
+    {
+      "src": "/logo.svg",
+      "sizes": "any",
+      "type": "image/svg+xml",
+      "purpose": "any maskable"
+    },
+    {
+      "src": "/favicon.svg",
+      "sizes": "any",
+      "type": "image/svg+xml",
+      "purpose": "any"
+    }
+  ]
+}