fix(vite): 使用代理，以解决跨域问题

.env.example

@@ -1,3 +1,2 @@
-VITE_CLERK_PUBLISHABLE_KEY=
-VITE_STEPFUN_ENDPOINT=
+VITE_STEPFUN_ENDPOINT=/proxy
 VITE_STEPFUN_API_KEY=

vite.config.ts

@@ -4,7 +4,6 @@ import react from '@vitejs/plugin-react-swc'
 import tailwindcss from '@tailwindcss/vite'
 import { tanstackRouter } from '@tanstack/router-plugin/vite'
 
-// https://vite.dev/config/
 export default defineConfig({
   plugins: [
     tanstackRouter({
@@ -19,4 +18,13 @@ export default defineConfig({
       '@': path.resolve(__dirname, './src'),
     },
   },
+  server: {
+    proxy: {
+      '/proxy': {
+        target: 'https://api.stepfun.com/v1',
+        changeOrigin: true,
+        rewrite: (path) => path.replace(/^\/proxy/, ''),
+      },
+    },
+  },
 })