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/active-processes.tsx

@@ -46,7 +46,7 @@ function getModeColor(modeId?: string): string {
 
 const styles = StyleSheet.create((theme) => ({
   container: {
-    backgroundColor: theme.colors.card,
+    backgroundColor: theme.colors.surface2,
     borderBottomWidth: 1,
     borderBottomColor: theme.colors.border,
   },
@@ -57,7 +57,7 @@ const styles = StyleSheet.create((theme) => ({
     borderBottomColor: theme.colors.border,
   },
   backButton: {
-    backgroundColor: theme.colors.muted,
+    backgroundColor: theme.colors.surface2,
     paddingHorizontal: theme.spacing[4],
     paddingVertical: theme.spacing[2],
     borderRadius: theme.borderRadius.lg,
@@ -87,7 +87,7 @@ const styles = StyleSheet.create((theme) => ({
     backgroundColor: theme.colors.primary,
   },
   processItemInactive: {
-    backgroundColor: theme.colors.muted,
+    backgroundColor: theme.colors.surface2,
   },
   agentIcon: {
     width: 12,