Depends on: TASK-BLOG_VIEW_AS_HOME-002, TASK-BLOG_VIEW_AS_HOME-003
Description: Add tests that prove the feed is newest-first, the %% more %% preview logic behaves correctly, the 5-block fallback works, and RBAC hides unauthorized items. Follow §Testing Strategy and keep the assertions at the behavior level.
Decision budget:
Junior can decide: test fixtures, sample markdown content, and assertion style.
Escalate to TL/PTL: any fixture or test change that implies a product-rule interpretation rather than a straight verification.
Acceptance criteria:
Task
Tests cover %% more %% truncation.
Task
Tests cover 5-block fallback previews.
Task
Tests cover newest-first ordering and RBAC hiding.