* feat: show metadata subtitle (date + word count) instead of snippet
Replace the note list subtitle with a compact metadata summary showing
relative date and word count (e.g. "2d ago · 342 words") instead of
the first paragraph of note content. Adds word_count to VaultEntry on
the Rust backend, computed during vault scan.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix: cargo fmt formatting
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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
