The model picker in NewProviderDialog rendered inline, causing dialog
resizing and lacked keyboard navigation. Replace it with a Popover +
Command (shadcn Combobox) pattern and add fuse.js for fuzzy search.
- Replace custom ModelPickerList with Popover + Command dropdown
- Add fuse.js for fuzzy model search (replaces string.includes)
- Add MODEL_SELECTED_EVENT and AI_PROVIDER_UPDATED_EVENT analytics
- Enrich PROVIDER_SELECTED_EVENT with model_id in chat sessions
81350c0d7f