Adds one chip per language currently present in public content —
counting both primary language and any secondary audio track, sorted
by video count, capped at 12. Clicking a chip lists every video whose
primary is that language or that has a matching secondary track; cards
surfaced only via a secondary track link straight to /videos/{key}?track=<id>
so the pinned playback wiring loads the right audio, get a small flag
badge on the thumbnail, and their hover-preview streams the track file
instead of the primary.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
fcb752dd76