[Andreas-Garcia]

Summary

Reference genre panels now distinguish catalogue songs from actual playlist members and use explicit genre/subgenre counts. A parent with songs only in descendants remains playable, while catalogue-only songs do not inflate playlist counts.

Changes

• Require separate reference catalogue and playlist summaries; preserve the historical personal (me) response contract.
• Share canonical/regional/all selection defaults, count lookup and tree sizing. Carry selection, artist and anchor through playback and pagination.
• Show all selection counts in shared detail/tree panels and pass the real nested playlist summary to Play.
• Queue catalogue rows through the playable catalogue independently of membership; the genre Play action still queues members.
• Update schemas, artist projections, cache keys, regression tests, README and Unreleased changelog.

Compatibility and recovery

BREAKING CHANGE: reference genre parsers require the explicit contract delivered by Grow API PR415 (merged). Existing personal scope is unchanged. Consumer source migration uses the new count helper; package publication and dependency updates require a separate authorized release. No versions, tags, publication or production changes are included. To recover before publication, revert this feature PR; no data migration is involved.

Test plan

• Passed: pnpm lint, pnpm build, full headless suite (636 tests, coverage gate) and UI suite (443 tests, coverage gate). Final provider regression run: 60 tests; lint rerun after the test-only addition.
• Intent: change; depth: deep (shared API/player/consumer contract).
• Fresh independent review of 4d89f75..a6b1de8, then focused verification through 965a829. Confirmed catalogue/member playback finding fixed; no remaining correctness findings. Final changes through eca1313 add migration documentation and a reviewed country-recovery regression test; no additional runtime changes.
• Tests cover distinct populations, child-only songs, explicit canonical/regional/all counts, selection/artist/anchor persistence and catalogue queue pagination.

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