* feat: integrate models.dev for dynamic LLM provider/model data (#TKT-657)
Replace hardcoded model lists with data sourced from models.dev so new
providers and models appear automatically when the community adds them.
- Add build script (scripts/generate-models.ts) that fetches models.dev/api.json
and outputs a compact JSON with 10 providers and 520 models
- Replace hardcoded MODELS_DATA (50 models) with dynamic models.dev lookups
- Add searchable model combobox (Popover + Command) replacing plain Select dropdown
- Enrich provider templates with models.dev metadata (context window, image support)
- Keep chatgpt-pro, qwen-code, browseros, openai-compatible as hardcoded providers
* fix: address review — remove ollama-cloud mapping, fix default models, remove dead code
- Remove ollama from PROVIDER_MAP (ollama-cloud has cloud models, not local)
- Add ollama to CUSTOM_PROVIDER_MODELS with empty list (users type custom IDs)
- Update defaultModelIds to ones that exist in models.dev data:
openrouter → anthropic/claude-sonnet-4.5
lmstudio → openai/gpt-oss-20b
bedrock → anthropic.claude-sonnet-4-6
- Remove dead isCustomModel export
- Regenerate models-dev-data.json (9 providers, 486 models)
* fix: model suggestion list focus/dismiss behavior
- List only opens when input is focused or user types
- Clicking a model selects it and closes the list
- Clicking outside (blur) dismisses the list
- onMouseDown preventDefault on list items prevents blur race condition
* refactor: extract ModelPickerList component with proper open/close UX
- Collapsed state: Select-like trigger showing selected model + chevron
- Expanded state: search input + scrollable filtered list, inline
- Click outside or Escape to close, Enter to submit custom model
- Extracted as separate component (reduces dialog nesting, testable)
- No more setTimeout hacks for blur handling
* chore: remove plan doc from repo
