Replace the old search modal with a keyboard-driven command palette: blurred
backdrop, centered input, results grouped by channel with highlighted FTS
snippets (char(2)/char(3) → <mark>), ↑↓ navigation, Enter to open, Esc to
close, recent searches + quick actions (Downloads/Stats/Health/Shortcuts) in
localStorage. Debounced queries to /api/search with a sequence guard so stale
responses don't clobber newer ones. Upload date is looked up client-side from
the loaded library (SearchHit has no date field). Opened by the 🔍 header
button and the `f` hotkey.
Verified: node --check passes, release builds clean, and a headless harness
screenshot confirms grouped results, highlighted matches, and selection.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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