feat(v3): Web 应用化基线（异步任务/SSE/llama-server 管理/Vue SPA 四页 + 设置页整页滚动修复）

webapp/vite.config.ts

@@ -0,0 +1,27 @@
+import vue from '@vitejs/plugin-vue'
+import { defineConfig } from 'vite'
+import { resolve } from 'path'
+
+export default defineConfig({
+  plugins: [vue()],
+  base: '/static/',
+  resolve: {
+    alias: { '@': resolve(__dirname, 'src') },
+  },
+  server: {
+    proxy: {
+      // 开发时：前端同源请求（无 /api 前缀）代理到 FastAPI
+      '/chat':   { target: 'http://localhost:8000', changeOrigin: true },
+      '/runs':   { target: 'http://localhost:8000', changeOrigin: true },
+      '/review': { target: 'http://localhost:8000', changeOrigin: true },
+      '/api/metrics':{ target: 'http://localhost:8000', changeOrigin: true },
+      '/config': { target: 'http://localhost:8000', changeOrigin: true },
+      '/health': { target: 'http://localhost:8000', changeOrigin: true },
+      '/traces':{ target: 'http://localhost:8000', changeOrigin: true },
+    },
+  },
+  build: {
+    outDir: '../gateway/static',
+    emptyOutDir: true,
+  },
+})