task-17(壳层/路由): 桌面端壳层响应式验收 + 浏览器验收基建

引入 @playwright/test(mdEdge 通道)，playwright.config 起 mock admin API + vite dev；
e2e 覆盖宽/窄屏自动折叠、折叠持久化、无横向溢出等 8 用例；workspace 边界扫描
排除测试专用 e2e/scripts/playwright.config。

admin-frontend-vue/src/config/workspace.ts

@@ -30,13 +30,13 @@ export const FORBIDDEN_COUPLING_TOKENS = [
   'app_client',
 ] as const
 
-const SELF_SCAN_EXCLUSIONS = new Set(['src/config/workspace.ts'])
+const SELF_SCAN_EXCLUSIONS = new Set(['src/config/workspace.ts', 'playwright.config.ts'])
 const SCAN_EXTENSIONS = /\.(ts|tsx|vue|css|html|json|js)$/
 
 export function walk(rootDir: string, base = ''): string[] {
   const found: string[] = []
   for (const entry of readdirSync(join(rootDir, base), { withFileTypes: true })) {
-    if (['node_modules', 'dist', '.git', 'tests'].includes(entry.name)) continue
+    if (['node_modules', 'dist', '.git', 'tests', 'e2e', 'scripts', 'deploy'].includes(entry.name)) continue
     const rel = base ? `${base}/${entry.name}` : entry.name
     if (entry.isDirectory()) found.push(...walk(rootDir, rel))
     else if (SCAN_EXTENSIONS.test(entry.name)) found.push(rel)