feat(frontend): add Vue 3 web application

- Add Vue 3 + TypeScript + Pinia setup
- Add 6 complete views: Dashboard, Queue, Scanner, Rules, Workers, Settings
- Add Pinia stores for state management
- Add API service with Axios client
- Add dark theme with Tdarr-inspired styling
- Add setup wizard component
- Add path browser for filesystem navigation

frontend/vite.config.ts

@@ -0,0 +1,34 @@
+import { fileURLToPath, URL } from 'node:url'
+import { defineConfig } from 'vite'
+import vue from '@vitejs/plugin-vue'
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  plugins: [
+    vue(),
+  ],
+  resolve: {
+    alias: {
+      '@': fileURLToPath(new URL('./src', import.meta.url))
+    }
+  },
+  server: {
+    port: 3000,
+    proxy: {
+      '/api': {
+        target: 'http://127.0.0.1:8000',
+        changeOrigin: true,
+      },
+      '/health': {
+        target: 'http://127.0.0.1:8000',
+        changeOrigin: true,
+      }
+    }
+  },
+  build: {
+    outDir: 'dist',
+    assetsDir: 'assets',
+    sourcemap: false,
+  }
+})
+