fix(build): prepare frontend workspace outputs

- Build GUI and web frontend workspace dependencies before Vite starts
- Use relative GUI asset paths for Tauri packaged resources
- Refresh caniuse-lite to remove stale Browserslist warnings

easytier-web/frontend/package.json

@@ -4,8 +4,9 @@
   "version": "0.0.0",
   "type": "module",
   "scripts": {
-    "dev": "vite",
-    "build": "vue-tsc -b && vite build",
+    "build:deps": "pnpm --filter easytier-frontend-lib build",
+    "dev": "pnpm run build:deps && vite",
+    "build": "pnpm run build:deps && vue-tsc -b && vite build",
     "preview": "vite preview"
   },
   "dependencies": {
@@ -32,4 +33,4 @@
     "vite-plugin-singlefile": "^2.0.3",
     "vue-tsc": "^2.1.10"
   }
-}
+}