Completes Step 3 of FN-3618 by surfacing AI provider icons throughout the Settings modal and model dropdowns, updating both the component styles and adding integration and unit tests to cover the new icon display behavior.
Fusion-Task-Id: FN-3618
The status-bar folder-toggle button had a 1px border + radius that made it
look like a chip. Per request, render it as a bare icon — transparent
background, no border. Hover now only shifts the icon color, the active
state drops to color only, and focus-visible still draws a focus ring with
border-radius applied so it remains a clean halo.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
- Update ProviderIcon.tsx to use Moonshot AI logo instead of Kimi branding
- Fix logo display in UsageIndicator component
- Add ProviderIcon unit tests covering all provider icons
- Add UsageIndicator tests for provider icon rendering
- Add CustomModelDropdown integration tests for model selection flow
