- Move voice clone cache from module-level memory to localStorage
so it survives page refresh and works across browser tabs
- VoiceAvatarPlaceholder now syncs clone result to localStorage
immediately after creation (both design and clone paths)
- usePodcastProjectState auto-merges voice clone cache into project
knobs when loading a project (fills gap for projects created
before voice clone or when voice clone was created after)
- CreateModal now detects voice clone IDs by prefix (vc_*) not
just by VOICE_CLONE_ID constant, fixing the mismatch where
VoiceSelector passes the actual clone ID but CreateModal
expected the placeholder ID
- AudioRegenerateModal is intentionally per-scene override and
does not write back to knobs (by design)
- trends.py handler added for podcast topic trend analysis
fc47445181