style: 优化个人中心和偏好设置弹窗样式，重构工作入口为精致分屏布局并移除首字徽标

frontend/src/main.test.ts

@@ -0,0 +1,16 @@
+import { describe, expect, it } from "vitest";
+import { readFileSync } from "node:fs";
+import { resolve } from "node:path";
+
+const readIndexHtml = () => readFileSync(resolve(__dirname, "../index.html"), "utf8");
+
+describe("app bootstrap shell", () => {
+  it("renders a lightweight startup placeholder before Vue mounts", () => {
+    const source = readIndexHtml();
+
+    expect(source).toContain('<div id="app">');
+    expect(source).toContain("ctms-boot-splash");
+    expect(source).toContain("正在启动 CTMS");
+    expect(source).toContain("正在加载桌面客户端");
+  });
+});