refactor: unlock dev flow, dedupe EcommercePage, extract shell UI components

vite.config.ts

@@ -42,8 +42,16 @@ export default defineConfig(({ command }) => {
             if (id.includes("node_modules/react") || id.includes("node_modules/react-dom") || id.includes("node_modules/scheduler")) {
               return "vendor-react";
             }
-            if (id.includes("node_modules/@ant-design") || id.includes("node_modules/antd") || id.includes("node_modules/rc-")) {
-              return "vendor-antd";
+            // 项目未安装 antd，只用了 @ant-design/icons + @phosphor-icons/react。
+            // 把图标库及其依赖（icons-svg / colors / fast-color / rc-util）单独成块，
+            // 避免它们被打进 EcommercePage 业务 chunk，方便浏览器长缓存。
+            if (
+              id.includes("node_modules/@ant-design") ||
+              id.includes("node_modules/@phosphor-icons") ||
+              id.includes("node_modules/rc-util") ||
+              id.includes("node_modules/rc-")
+            ) {
+              return "vendor-icons";
             }
           },
         },