fix(ci): split unit/integration tests and fix landing test failures

- Separate unit tests (fast, no system deps) from integration test
  shards to prevent vi.mock db leakage across test types
- Fix hero test: update expected subtitle to match current copy
- Fix FAQ test: add missing json-ld alias in vitest config and mock
- Integration tests run in 4 parallel shards (30min timeout each)

.github/workflows/ci.yml

@@ -42,8 +42,17 @@ jobs:
       - uses: ./.github/actions/setup
       - run: pnpm typecheck
 
-  test:
-    name: Test (${{ matrix.shard }}/4)
+  test-unit:
+    name: Unit Tests
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - uses: ./.github/actions/setup
+      - run: pnpm vitest run tests/unit/ --reporter=verbose
+
+  test-integration:
+    name: Integration (${{ matrix.shard }}/4)
     runs-on: ubuntu-latest
     timeout-minutes: 30
     strategy:
@@ -65,7 +74,7 @@ jobs:
           fi
 
       - uses: ./.github/actions/setup
-      - run: pnpm vitest run --reporter=verbose --shard=${{ matrix.shard }}/4
+      - run: pnpm vitest run tests/integration/ --reporter=verbose --shard=${{ matrix.shard }}/4
 
   pip-audit:
     name: Python Dependency Audit
@@ -93,7 +102,7 @@ jobs:
   build:
     name: Build
     runs-on: ubuntu-latest
-    needs: [lint, typecheck, test]
+    needs: [lint, typecheck, test-unit, test-integration]
     steps:
       - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
       - uses: ./.github/actions/setup