manifest.ts uses icon.svg and the app's palette for background/theme
color. Excluded /manifest.webmanifest from the auth gate in proxy.ts,
same as icon.svg/favicon.ico - it must be publicly fetchable regardless
of login state.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01W8WkFF5ppURBAB918593Eb
