fix(native): replace #007AFF with colors.brandOrange in dm + room screens

Consistent with chat.tsx refactor — ActivityIndicator, joinBtn, and
avatarEdit badge all now use the theme token.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/rebreak-native/app/dm.tsx

@@ -263,7 +263,7 @@ export default function DmScreen() {
       >
         {isLoading && messages.length === 0 ? (
           <View style={styles.loadingBox}>
-            <ActivityIndicator color="#007AFF" />
+            <ActivityIndicator color={colors.brandOrange} />
           </View>
         ) : messages.length === 0 ? (
           <View style={styles.loadingBox}>

apps/rebreak-native/app/room.tsx

@@ -727,7 +727,7 @@ function makeStyles(colors: ReturnType<typeof useColors>) {
     },
     joinBtn: {
       marginTop: 16,
-      backgroundColor: '#007AFF',
+      backgroundColor: colors.brandOrange,
       paddingHorizontal: 32,
       paddingVertical: 12,
       borderRadius: 12,
@@ -799,7 +799,7 @@ function makeModalStyles(colors: ReturnType<typeof useColors>) {
       width: 28,
       height: 28,
       borderRadius: 14,
-      backgroundColor: '#007AFF',
+      backgroundColor: colors.brandOrange,
       borderWidth: 3,
       borderColor: colors.bg,
       alignItems: 'center',