The shell stamps meta.provider (platform display name via
parse_managed_model_key) on every managed {platform}/{model} catalog
entry in to_acp_model_info; user-defined [model.*] entries stay
provider-less. The /model dropdown surfaces it in the description column
(a model's own description still wins), so the picker reads as 'choose a
model from your connected providers'.
Verified: kigi-shell 5261 + kigi-tui 6873 tests green, clippy clean.
ZacharyZhang-NY
63ff114f71