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b103a722ce
Reported on macOS: on a fresh install, pointing at a DLC folder in Settings and running a scan showed NO songs until an app restart. The scan itself was fine — _background_scan re-reads config.json fresh, so it scans the new folder and populates the library — but the v3 Songs grid never reloaded. The Settings Rescan / Full Rescan handlers only refreshed the classic (v2) library via loadLibrary(); the v3 grid (static/v3/songs.js) had no listener for a scan it didn't initiate (only its own upload path self-refreshes via watchUploadScan). So its cached, pre-DLC (empty) DOM/snapshot survived a sidebar return until a full reload (restart). Fix: the rescan handlers now emit `library:changed` (static/app.js). The v3 grid listens and reloads if it's the active screen, else sets `_libraryDirty` so the next onV3SongsScreenEnter does a full re-fetch — a short-circuit placed ahead of every cached-DOM fast-path so it can't restore the stale grid. Tests: tests/js/v3_library_refresh.test.js guards the emit + the reload/dirty wiring (DOM/event glue isn't headlessly unit-testable; end-to-end wants an in-app run of the reporter's flow: set DLC in Settings → scan → Songs populate without restart). Claude-Session: https://claude.ai/code/session_01QbexxfTt8q2tAn436MqGWF Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com> Co-authored-by: byrongamatos <xasiklas@gmail.com>