feat: persist draft messages and UI refinements

- Add dedicated draft-store with AsyncStorage persistence for drafts
  that survive app refresh/crash
- Reduce markdown bold weight from bold to medium (500)
- Various theme and component style updates
- Server bootstrap and config improvements

🤖 Generated with [Claude Code](https://claude.com/claude-code)

packages/app/src/components/dictation-status-notice.tsx

@@ -48,12 +48,12 @@ export function DictationStatusNotice({
       case "error":
         return theme.colors.palette.red[500];
       default:
-        return theme.colors.background;
+        return theme.colors.surface0;
     }
   })();
 
   const foregroundColor = variant === "info" ? theme.colors.foreground : theme.colors.palette.white;
-  const secondaryColor = variant === "info" ? theme.colors.mutedForeground : theme.colors.palette.white;
+  const secondaryColor = variant === "info" ? theme.colors.foregroundMuted : theme.colors.palette.white;
 
   return (
     <View