Add a selectable Mornye theme with shared glass controls, dialogs, sheets, notifications, and collection headers while retaining Material components.
Update player artwork, lyrics transitions and highlighting, synchronized rolling time labels, volume controls, and compact navigation. Unify metadata, Library, search, and extension surfaces; preserve restored artwork and report extension load failures.
Validation: full Flutter analyzer clean; 713 tests passed and 4 skipped; pinned Dart formatting and diff checks passed; signed ARM64 and ARM32 release APKs built and verified.
Use shared coordinators for queueing FLAC replacements and batch metadata enrichment from album and queue screens. Keep selection lifecycle handling in each screen and synchronize a settings snapshot once per phase.
Cover cancellation, partial failure, screen disposal, and settings changes between preview and apply.
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