* feat(deepseek): add vision mode support
DeepSeek added a third model "识图模式" (Vision Mode) that accepts
image uploads for visual understanding. Add vision to the --model
choices, update selectModel to use explicit index mapping for all
three models, skip the search toggle in vision mode (not available),
and extend waitForFilePreview to detect image thumbnails via send
button state since vision mode shows a preview image instead of a
filename label.
Also catch "Not allowed" errors from setFileInput (Cloudflare may
block CDP file operations) so the DataTransfer fallback can run.
Closes#1215
* fix(deepseek): harden vision upload mode
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Co-authored-by: jackwener <jakevingoo@gmail.com>
Benjamin Liu
094ff0da80