Bump VERSION to 0.4.0 and add the 0.4.0 release-notes entry (Epic N: left nav sidebar,
multi-account switch, Settings page, in-app back, frosted-glass refresh).
Bump VERSION to 0.3.0 and add the 0.3.0 release-notes entry (local playlists, watch
later as a playlist, YouTube mirror + two-way sync, sort + undo/redo, rail sorting).
Bump VERSION to 0.2.0 and add release notes covering the Mine/Library shared-feed
scope, dynamic faceted filter chips (live counts, hide non-matching, Any/All topic
match), surprise-me reshuffle, share-view links, and the deep-backfill status
clarity fixes.
About (in the account menu) shows frontend/backend/database versions + build.
Release Notes renders per-version highlights with a commit-SHA reference; a
dismissible banner appears once after the running build's version changes and
links into the notes. Adds a reusable Modal shell and the release-notes data
(detailed v0.1.0).
