fix(node,client): query TMDB only once a language is chosen, in that language

2026-09-26T12:28:13Z

TMDB fiches are fetched lazily, on browse, and the fetch used to run whatever the moment it was first triggered — routinely before the operator had opened settings and picked a language, so it queried in TMDB's English default. Then the fiche was cached by tmdb_id alone, with no note of language and a 30-day TTL, so switching to the intended language afterwards changed nothing: the English fiche was served until it expired. The operator's only recourse was to find and wipe the cache by hand (found live 2026-09-26: a whole library indexed in English although "Français" had been chosen). Two rules now, both there to make the first fetch the right language rather than English-then-corrected, and to stop the doubled requests that eventually get a node rate-limited: - No language configured, no query. media_meta_req/season_meta_req answer confidence 0 and make no TMDB call while tmdb_language is unset; the fetch waits for the operator's choice, so the first (and only) query is in it. English is now a first-class choice (en-US), not the default of skipping the setting. - Changing the language wipes the metadata cache (ops.set_tmdb_config), so the new language takes effect on an already-browsed library. The file->tmdb matches are language-independent and kept. The client refetches on the tmdb_config_ack that carries the new language, so the grid updates without a page reload. docs/MESHBAY_DESIGN.md §9.7 states both rules; tests cover the gate and the cache wipe, and two existing handler harnesses now declare a language. Co-Authored-By: Claude Opus 4.8

meshbay.git/packages/meshbay-node/tests/test_tmdb_language_change_clears_cache.py, branch main

fix(node,client): query TMDB only once a language is chosen, in that language