Restore admin shell and harden smoke tests

scripts/route_lint.mjs

@@ -27,6 +27,11 @@ const required = [
     file: 'tests/e2e/route-isolation.spec.ts',
     pattern: 'admin login boots the admin app under the admin base path',
     message: '관리자 base path 하네스가 필요합니다.'
+  },
+  {
+    file: 'tests/e2e/admin-smoke.spec.ts',
+    pattern: '.admin-shell',
+    message: '관리자 셸 렌더 검증이 필요합니다.'
   }
 ];
 
@@ -60,6 +65,13 @@ for (const file of adminFiles) {
       failed = true;
     }
   }
+
+  if (file === 'src/TaxBaik.Web.Client/Components/Admin/Layout/MainLayout.razor') {
+    if (!text.includes('<AdminShell>')) {
+      console.error('[route-lint] FAIL MainLayout: admin shell wrapper should be restored.');
+      failed = true;
+    }
+  }
 }
 
 if (failed) process.exit(1);

src/TaxBaik.Web.Client/Components/Admin/Layout/MainLayout.razor

@@ -1,5 +1,5 @@
 @inherits LayoutComponentBase
 
-<div class="admin-layout-shell">
+<AdminShell>
     @Body
-</div>
+</AdminShell>

tests/e2e/admin-smoke.spec.ts

@@ -59,6 +59,9 @@ test.describe('admin smoke', () => {
     await expect(page).toHaveURL(/\/taxbaik\/admin\/dashboard$/, { timeout: 20_000 });
     await expect(page.locator('body')).toContainText('세무 운영 콘솔', { timeout: 60_000 });
     await expect(page.getByRole('link', { name: /로그아웃/ })).toBeVisible({ timeout: 30_000 });
+    await expect(page.locator('.admin-shell')).toBeVisible({ timeout: 30_000 });
+    await expect(page.locator('.admin-drawer')).toBeVisible({ timeout: 30_000 });
+    await expect(page.locator('.admin-content')).toContainText(/대시보드|세무 운영 콘솔/, { timeout: 30_000 });
     await captureEvidence(page, test.info(), 'admin-dashboard-smoke');
 
     expect(consoleErrors, 'browser console/page errors').toEqual([]);