style: apply dart formatting fixes across lib/ and test/

11 files had formatting inconsistencies that caused the
--set-exit-if-changed gate to fail. Automated formatting
via dart format now passes cleanly.

lib/streaming_audio_business_object.dart

@@ -35,21 +35,25 @@ class StreamingAudioBusinessObject extends ChangeNotifier {
       return;
     }
 
-    _audioHandlerInitFuture ??= AudioService.init(
-      builder: () => KryzAudioHandler(),
-      config: const AudioServiceConfig(
-        androidNotificationChannelId: 'com.kryzgoflutter.audio.channel',
-        androidNotificationChannelName: '${AppConfig.appName} Audio Playback',
-        androidNotificationOngoing: true,
-        androidStopForegroundOnPause: true,
-      ),
-    ).then((handler) {
-      _audioHandler = handler;
-      return handler;
-    }).catchError((error) {
-      _audioHandlerInitFuture = null;
-      throw error;
-    });
+    _audioHandlerInitFuture ??=
+        AudioService.init(
+              builder: () => KryzAudioHandler(),
+              config: const AudioServiceConfig(
+                androidNotificationChannelId: 'com.kryzgoflutter.audio.channel',
+                androidNotificationChannelName:
+                    '${AppConfig.appName} Audio Playback',
+                androidNotificationOngoing: true,
+                androidStopForegroundOnPause: true,
+              ),
+            )
+            .then((handler) {
+              _audioHandler = handler;
+              return handler;
+            })
+            .catchError((error) {
+              _audioHandlerInitFuture = null;
+              throw error;
+            });
 
     await _audioHandlerInitFuture;
   }
@@ -146,9 +150,12 @@ class StreamingAudioBusinessObject extends ChangeNotifier {
         return;
       }
 
-      final title = item.title.trim().isEmpty ? AppConfig.defaultTitle : item.title;
-      final subtitle =
-          (item.artist ?? '').trim().isEmpty ? AppConfig.defaultArtist : item.artist!.trim();
+      final title = item.title.trim().isEmpty
+          ? AppConfig.defaultTitle
+          : item.title;
+      final subtitle = (item.artist ?? '').trim().isEmpty
+          ? AppConfig.defaultArtist
+          : item.artist!.trim();
 
       if (title == _currentTitle && subtitle == _currentSubtitle) {
         return;