重构通道名称，在Android和iOS实现中使用统一的命名空间‘app.record_tool’。相应地更新相关的常量和方法通道。增强在录制HUD中的缩放比例显示格式。

lib/features/recording/platform/recording_channel_names.dart

@@ -1,5 +1,5 @@
 abstract final class RecordingChannelNames {
-  static const packageName = 'com.run.sportsx';
-  static const method = '$packageName/recording';
-  static const events = '$packageName/recording_events';
+  static const namespace = 'app.record_tool';
+  static const method = '$namespace/recording';
+  static const events = '$namespace/recording_events';
 }

lib/features/recording/widgets/widget_recording_hud.dart

@@ -308,7 +308,7 @@ class _ZoomPresetButton extends StatelessWidget {
           ),
         ),
         child: Text(
-          '${_formatZoomRatio(displayRatio)}x',
+          _formatZoomRatio(displayRatio),
           style: TextStyle(
             fontSize: 13.sp,
             fontWeight: FontWeight.w700,
@@ -320,9 +320,12 @@ class _ZoomPresetButton extends StatelessWidget {
   }
 
   String _formatZoomRatio(double ratio) {
-    if (ratio == ratio.roundToDouble()) {
-      return ratio.toStringAsFixed(0);
+    if (ratio < 1.0) {
+      return '广角';
     }
-    return ratio.toStringAsFixed(1);
+    if (ratio == ratio.roundToDouble()) {
+      return '${ratio.toStringAsFixed(0)}x';
+    }
+    return '${ratio.toStringAsFixed(1)}x';
   }
 }