LLLin000 4ff165ae49 feat(#38, #40): version history panel + @ Deep Search ...

#38: File Recovery-style version history panel with i18n (en/zh).
- _renderVersionMode() with paper list + timeline + restore/compare
- version-history.ts service for scan/restore/compare
- Paper mode [版本历史] button
- i18n strings for all panel text

#40: @ Deep Search with query rewrite + hybrid retrieval.
- query_rewrite.py: abbreviation expansion (28 terms) + synonyms (12)
- hybrid_search(): BM25 FTS5 + vec0 k-NN + score fusion (0.3/0.7)
- retrieve --deep flag routes to hybrid_search
- Graceful vec0 fallback (FTS5-only)
- 17 new tests

Co-authored-by: VersionPanel <agent>
Co-authored-by: DeepSearch <agent>

2026-07-10 01:01:48 +08:00

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