feat(frontend): M9 模态 UI（mode 系统+共享 store+WS 客户端 + chat(思维链/工具回显/情绪徽标)/code/Agent 监控/后台思考页 + Miuix 设计 token + PWA）；tsc+vite build 通过

frontend/web/vite.config.ts

@@ -0,0 +1,28 @@
+import { defineConfig } from "vite";
+import react from "@vitejs/plugin-react";
+
+// Cyrene v2 frontend (M9). Dev server proxies REST + WebSocket to the single
+// backend gateway on :8080 so the SPA can stay same-origin. The production
+// build is served by the gateway itself (single binary), so `base` is relative
+// and there is no runtime proxy.
+const devProxy = {
+  "/api": { target: "http://localhost:8080", changeOrigin: true },
+  "/ws": { target: "ws://localhost:8080", ws: true },
+};
+
+export default defineConfig({
+  plugins: [react()],
+  base: "./",
+  server: {
+    port: 5173,
+    proxy: devProxy,
+  },
+  preview: {
+    port: 4173,
+  },
+  build: {
+    outDir: "dist",
+    sourcemap: false,
+    target: "es2022",
+  },
+});