- Add `ai_list_models` Tauri command and core support for fetching available models from OpenAI-compatible, Claude, and Ollama providers
- Replace manual model ID input with SearchableSelect in EditorSettingsDialog, including refresh button and loading state
- Add i18n translations for model list UI (en, es, zh-CN)
- Add tests for settings dialog layout and web driver management
Thinking models like DeepSeek V4 Flash can exceed the 120s stream
timeout during long reasoning, causing truncated output and missing
answers. Increase stream timeout to 600s when thinking is enabled,
raise max_tokens floor to 8192, and bump reasoning display max-height.
Closes#326