Xubin Ren c4628038c6 fix: handle image_url rejection by retrying without images ...

Replace the static provider-level supports_vision check with a
reactive fallback: when a model returns an image-unsupported error,
strip image_url blocks from messages and retry once. This avoids
maintaining an inaccurate vision capability table and correctly
handles gateway/unknown model scenarios.

Also extract _safe_chat() to deduplicate try/except boilerplate
in chat_with_retry().

2026-03-15 22:32:34 +08:00

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