Refactor VQA module from module-level globals to a VQA class singleton
pattern with self-contained per-model loading methods.
Changes:
- Add VQA class with model/processor state and detection data storage
- Extract load methods for clean model pre-loading via UI
- Interrogate to return string only; store detection data on instance
- Add vqa_draw.py for bounding box/point annotation utilities
Stub, further transfer of drawing functions to follow
- Update moondream3.py to store detection data on VQA singleton
- Update endpoints.py and ui_caption.py for new return type
- Add interrogate_vlm_thinking_mode setting to save checkbox state
- Update ui_caption to restore Thinking Mode preference on load
- Add blank line before 'Answer:' label for visual separation
- Remove '\n\n' replacement in clean() that stripped blank lines
- Fix Qwen reasoning detection when <think> tag is in prompt, not response
- Add reasoning icon to Moondream 2 and 3 model names
- Add load_model() function to pre-load VLM into memory
- Add unload_model() function to free VLM from memory
- Add Load/Unload buttons to Caption tab UI
CalamitousFelicitousness
Vladimir Mandic