In-place edits never refresh sidebar titles, tags, or search (modify events skip the rescan)

[anbturki]

Summary

Modify events on workspace files deliberately skip the rescan and only refresh git status. But sidebar titles (Recent lens), the tags lens, and quick-open/search all come from scan-time extraction, so a frontmatter title or tag changed by an in-place write stays stale indefinitely while the workspace is otherwise quiet. MCP update_doc writes in place, so agent edits hit this constantly.

Reproduction (release build of f485396, macOS)

1. Open a workspace containing research/getting-started.md with title: Getting Started; switch the sidebar to the Recent lens. It shows "Getting Started" (first screenshot).
2. Overwrite the file in place, changing the frontmatter to title: Renamed By Agent (same shape as MCP update_doc).
3. Wait several seconds: the sidebar still shows "Getting Started" (second screenshot). It stays stale indefinitely.
4. Create an unrelated file to force a rescan: the title flips to "Renamed By Agent" (third screenshot).

Root cause

• kind === "modify" only schedules a git-status refresh, never a rescan: src/hooks/useLibrary.ts:399-405.
• Titles and tags are extracted at scan time (src-tauri/core/src/scan.rs:81-86) and rendered from the scan result (e.g. file.title || file.name in src/components/explorer/RecentList.tsx).

Proposed fix

On modify events for non-skipped paths, either schedule the existing debounced rescan (already rate limited to one per 2 s) or re-extract metadata for just the modified paths and patch the scan result in place.

Screenshots

Baseline, stale after in-place title change, updated only after an unrelated file forces a rescan:

[anbturki]

Fixed by folding modify events into the rescan path, so in-place writes refresh sidebar titles, tags, and search. Verified live: an external frontmatter title change now shows up in the Recent lens within seconds, with no unrelated file needed to force a rescan.

Shipped in v0.9.1 (PR #24, commit 30b329e). The macOS build is notarized and stapled; downloads are on the release page.