Summary

• Add per-project icon override storage, projection, and favicon serving so projects can display custom icons throughout the app.
• Introduce canonical model selection handling across server and shared contracts to keep provider/model/options data normalized.
• Update provider/session orchestration to carry model selections through turn start, thread updates, and SME chat flows.
• Extend the settings UI, chat model picker, sidebar, and theme assets to surface project icons and the new model selection behavior.
• Refresh provider health, doctor output, and related projections to recognize the expanded provider/model catalog.

Testing

• bun fmt
• bun lint
• bun typecheck
• Added and updated unit coverage for project icon propagation, projection queries, model selection helpers, provider health, and thread orchestration.