Add route lint harness

package.json

@@ -4,6 +4,7 @@
     "test:e2e:headed": "playwright test --headed",
     "test:e2e:public-smoke": "playwright test --project=\"Public Smoke\" tests/e2e/public-smoke.spec.ts",
     "test:e2e:admin-smoke": "playwright test --project=\"Admin Smoke\" tests/e2e/admin-smoke.spec.ts",
+    "test:route-lint": "node scripts/route_lint.mjs",
     "test:e2e:ci": "playwright test --project=\"Desktop Chrome\"",
     "test:local": "python scripts/run_local_tests.py"
   },

scripts/route_lint.mjs

@@ -0,0 +1,60 @@
+import fs from 'node:fs';
+import path from 'node:path';
+
+const root = process.cwd();
+const files = [
+  'src/TaxBaik.Web/Program.cs',
+  'src/TaxBaik.Web.Client/Components/Admin/App.razor',
+  'src/TaxBaik.Web.Client/Components/Admin/Routes.razor',
+  'src/TaxBaik.Web.Client/Components/Admin/RedirectToLogin.razor',
+  'tests/e2e/public-smoke.spec.ts',
+  'tests/e2e/admin-smoke.spec.ts',
+  'tests/e2e/route-isolation.spec.ts'
+];
+
+const required = [
+  {
+    file: 'src/TaxBaik.Web/Program.cs',
+    pattern: 'MapGroup("/taxbaik/admin")',
+    message: '관리자 Razor Components는 /taxbaik/admin 그룹에만 매핑되어야 합니다.'
+  },
+  {
+    file: 'tests/e2e/route-isolation.spec.ts',
+    pattern: 'public home does not boot the admin app',
+    message: '공용/관리자 분리 하네스가 필요합니다.'
+  },
+  {
+    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.'
+  }
+];
+
+let failed = false;
+
+for (const entry of required) {
+  const fullPath = path.join(root, entry.file);
+  const text = fs.readFileSync(fullPath, 'utf8');
+  if (!text.includes(entry.pattern)) {
+    console.error(`[route-lint] FAIL ${entry.file}: missing "${entry.pattern}"`);
+    console.error(`  ${entry.message}`);
+    failed = true;
+  }
+}
+
+const adminFiles = files
+  .filter(file => file.includes('/Admin/') || file.includes('admin-smoke') || file.includes('route-isolation'));
+
+for (const file of adminFiles) {
+  const fullPath = path.join(root, file);
+  const text = fs.readFileSync(fullPath, 'utf8');
+  if (file === 'src/TaxBaik.Web/Program.cs') continue;
+
+  if (text.includes('ToBaseRelativePath(Navigation.Uri)')) {
+    console.error(`[route-lint] FAIL ${file}: unsafe ToBaseRelativePath(Navigation.Uri) usage detected.`);
+    failed = true;
+  }
+}
+
+if (failed) process.exit(1);
+console.log('[route-lint] OK');