Computes a SHA-256 partial-content fingerprint (file size + first 64 KB) for
movies, TV episodes, and mixed files during scans. When a file is moved or
renamed within a library, the scan detects the fingerprint match, renames the
media_items row in-place, and updates media_tags.media_key to match — so tags
and NFO metadata survive the move transparently.
- src/lib/fingerprint.ts: new computeFingerprint() using sync FS reads
- src/lib/db.ts: fingerprint TEXT column + index migration
- src/lib/tags.ts: reKeyMediaItem() to update media_tags on rename
- src/lib/scanner.ts: replace clear+upsert with detectMoves/reconcileAndPrune
for movies, TV episodes, and mixed files; games retain clear+upsert (v1)
- TV scan restructured to a single filesystem pass (no double-scanning)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
