* [AI Chat] [BYOM] Add supports_tools toggle to custom model settings UI
Expose the supports_tools flag in the custom model configuration UI
and persist it to prefs, allowing users to enable tool support
(e.g., web search) for custom models that support function calling.
- Add kCustomModelSupportsTools pref key and persist in GetModelDict/GetCustomModels
- Add supportsTools property, handler, and toggle in model_config_ui
- Add localized strings for the tool support toggle and tooltip
* [AI Chat] [BYOM] Restrict BYOM tool support to normal profiles
Add array<ConversationCapability> supported_capabilities model property
to filter which models are available for different conversation modes
(chat, content agent, etc.). Automatic (depends on tool support flag),
Claude Haiku and Sonnet have {CHAT, CONTENT_AGENT}, all other models
(including BYOM) have {CHAT} only.
Jocelyn Liu
bba0efea11