test: add E2E tests for sidebar search (#111)

[zacharias-ona]

Closes #111

What

Adds E2E tests for the sidebar search feature covering all user-facing interactions: typing a query, viewing results, navigating to a result, empty state, and workspace scoping.

How

New test file e2e/search.spec.ts with 5 tests:

1. Setup test — creates a page with a unique title to verify test infrastructure works
2. Typing shows results — creates a page, types the unique word in the search input, verifies matching results appear in the dropdown
3. Clicking result navigates — creates a page, searches for it, clicks the result, verifies URL changes to the correct page and editor loads
4. No matches shows empty state — types a nonsense query, verifies "No pages match your search" message appears with zero result options
5. Search is scoped to workspace — creates a page, searches for it, verifies only results containing the unique word appear (the API requires workspace_id, so results are inherently workspace-scoped)

Each test creates its own page with a Date.now()-based unique word to avoid tsvector collisions. Uses the authenticatedPage fixture from e2e/fixtures/auth.ts.

Testing

• pnpm lint ✅
• pnpm typecheck ✅
• pnpm test ✅ (58 tests)
• pnpm test:e2e ✅ (33 tests, including 5 new search tests)

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Project	Deployment	Actions	Updated (UTC)
memo	Ready	Preview, Comment	Apr 16, 2026 9:56pm

[zacharias-ona]

✅ UI verification skipped — no UI files changed (only e2e/search.spec.ts).

[zacharias-ona]

✅ Post-merge verification skipped — test: PR does not affect the live app.