[vinayagg]

Summary

• Put AI connections, model selection, default model, effort, and pricing in one desktop settings flow. Improve custom server discovery and subscription connection controls.
• Show thread ownership and transfer state in thread settings; move layout customization to global Appearance settings.
• Assign persistent colors and icons to organizations and simplify the appearance controls.
• Remove application-scoped tool mounting from thread runs.

Checks

• npm run check (passed)
• git diff --check (passed)