refactor: strengthen client boundaries and quality gates

src/routes/RouteLoadBoundary.test.tsx

@@ -0,0 +1,29 @@
+import { render, screen } from '@testing-library/react';
+import { describe, expect, it, vi } from 'vitest';
+import { RouteLoadBoundary } from './RouteLoadBoundary';
+
+function BrokenRoute(): never {
+  throw new Error('chunk load failed');
+}
+
+describe('RouteLoadBoundary', () => {
+  it('shows a recoverable Chinese error state when a route chunk throws', () => {
+    vi.spyOn(console, 'error').mockImplementation(() => undefined);
+    render(
+      <RouteLoadBoundary>
+        <BrokenRoute />
+      </RouteLoadBoundary>,
+    );
+    expect(screen.getByRole('alert')).toHaveTextContent('页面资源加载失败');
+    expect(screen.getByRole('button', { name: '重新加载' })).toBeEnabled();
+  });
+
+  it('renders healthy route content unchanged', () => {
+    render(
+      <RouteLoadBoundary>
+        <p>正常页面</p>
+      </RouteLoadBoundary>,
+    );
+    expect(screen.getByText('正常页面')).toBeVisible();
+  });
+});