* feat: unify search panel — remove keyword/semantic toggle, progressive results
Replace separate keyword/semantic mode toggle with a unified search that
streams results progressively: keyword results appear first (<500ms),
then hybrid results augment the list (~1-2s). Loading spinner shows in
the input field while semantic search runs. Stale requests are discarded
via generation counter for safe rapid typing.
- Extract search logic into useUnifiedSearch hook (code health 9.26+)
- 300ms debounce, 5s timeout on hybrid, graceful fallback on errors
- 15 tests covering progressive search, spinner, stale results, failures
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* docs: add design wireframes for unified search panel
Two frames showing the search panel states:
- "keyword results loaded, semantic loading" (with spinner)
- "all results loaded" (no spinner, more results including semantic)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* chore: coverage artifacts
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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
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