The model picker for API-key providers (MiniMax, z.ai, etc.) probes
the live /models endpoint when the curated list has fewer than 8
models. When the live endpoint returns fewer models than the curated
list (e.g. MiniMax's Anthropic-compatible endpoint doesn't list M2.7),
the incomplete live list was used instead.
Now falls back to the curated list when live returns fewer models,
ensuring new models like MiniMax-M2.7 always appear in the picker.