feat: 播放速度设置弹窗标题添加速度显示

src/renderer/components/player/AdvancedControlsPopover.vue

@@ -66,14 +66,14 @@
       <div class="modal-close" @click="showSpeedModal = false">
         <i class="ri-close-line"></i>
       </div>
-      <h3>{{ t('player.playBar.playbackSpeed') }}</h3>
+      <h3>{{ t('player.playBar.playbackSpeed') }} ({{ playbackRate }}x)</h3>
       <div class="speed-controls">
         <div class="speed-options">
-          <div 
-            v-for="option in playbackRateOptions" 
+          <div
+            v-for="option in playbackRateOptions"
             :key="option.key"
             class="speed-option"
-            :class="{ 'active': playbackRate === option.key }"
+            :class="{ active: playbackRate === option.key }"
             @click="selectSpeed(option.key)"
           >
             {{ option.label }}