aa3c5e59d3
Two real gaps the CI-red sibling tests exposed:
- read_selection() treated EVERY raw stt.provider: local as the legacy
DEFAULT_CONFIG seed and reported no-selection — but the seed never
reached config.yaml (save_config strips schema defaults), so a
picker- or hand-written local pick was silently discarded and the
autodetect ladder could route an explicit local user to cloud STT.
A raw 'local' is now a genuine selection; the merged-view ambiguity
note replaces the over-broad shim (mirror comment updated in
nous_subscription._selected_provider and _get_provider).
- _reconfigure_provider was half-migrated: the tts/stt/browser/web
branches and the managed-category fallthrough still wrote
use_gateway flags and vendor names for managed rows. They now write
the single provider string ('nous' for managed rows) and pop the
legacy key, matching _write_provider_config.