* feat(chatgpt): add model/mode selection and fix response polling
Add --model option to ask and send commands, and a new standalone
model command for switching ChatGPT Desktop models via Accessibility API.
Supported models: auto, instant, thinking, 5.2-instant, 5.2-thinking.
Changes:
- ax.ts: add AX_MODEL_SCRIPT (opens Options popover, searches within
AXPopover to avoid matching sidebar items, supports legacy models
submenu) and AX_GENERATING_SCRIPT (detects "Stop generating" button)
- ask.ts: add --model flag; fix polling to wait for generation to
complete instead of returning partial/thinking intermediate text
- send.ts: add --model flag
- model.ts: new standalone command to switch model/mode
* review: activate chatgpt before model selection
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Co-authored-by: jackwener <jakevingoo@gmail.com>