Replace colored letter badges with official SVG icons sourced from
Simple Icons (Anthropic, Google Gemini) and Wikimedia Commons (OpenAI).
- Create shared ProviderIcons.tsx with OpenAI, Anthropic, and Gemini
SVG icon components using the official brand marks
- Update PatternEditor ModelSelect dropdown to use real provider icons
- Update ActivityPanel model badges to use real provider icons
- Remove duplicated providerStyles objects from both files
Icons are inline SVG using currentColor for theme-aware coloring.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
