Build settings referenced ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME
= AccentColor but no such color set existed in Assets.xcassets, causing
a build warning. Added it using the app's existing blue accent (#0a7aca,
same as Color.oaiAccent) for consistency.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
