fix(AudioControls): 初始化音频索引时跳过导语音频

修改多处音频索引初始化逻辑，优先选择第一个非导语音频作为起始播放位置。在循环播放和自动播放场景下同样应用此逻辑，避免从导语开始播放

subPages/home/AudioControls.vue

@@ -321,7 +321,10 @@ export default {
                 this.totalTime = cachedAudio.totalDuration || 0;
                 this.hasAudioData = true;
                 this.isAudioLoading = false;
-                this.currentAudioIndex = 0;
+                
+                // 初始化音频索引为第一个非导语音频
+                const firstNonLeadIndex = this.findFirstNonLeadAudio();
+                this.currentAudioIndex = firstNonLeadIndex >= 0 ? firstNonLeadIndex : 0;
                 this.currentTime = 0;
                 this.currentHighlightIndex = -1;
 
@@ -612,7 +615,10 @@ export default {
                 // 从缓存加载音频数据
                 this.currentPageAudios = this.audioCache[cacheKey].audios;
                 this.totalTime = this.audioCache[cacheKey].totalDuration;
-                this.currentAudioIndex = 0;
+                
+                // 初始化音频索引为第一个非导语音频
+                const firstNonLeadIndex = this.findFirstNonLeadAudio();
+                this.currentAudioIndex = firstNonLeadIndex >= 0 ? firstNonLeadIndex : 0;
                 this.isPlaying = false;
                 this.currentTime = 0;
                 this.hasAudioData = true;
@@ -743,7 +749,10 @@ export default {
                                     if (!firstAudioPlayed && this.currentPageAudios.length > 0) {
                                         firstAudioPlayed = true;
                                         this.hasAudioData = true;
-                                        this.currentAudioIndex = 0;
+                                        
+                                        // 初始化音频索引为第一个非导语音频
+                                        const firstNonLeadIndex = this.findFirstNonLeadAudio();
+                                        this.currentAudioIndex = firstNonLeadIndex >= 0 ? firstNonLeadIndex : 0;
 
 
 
@@ -1784,16 +1793,23 @@ export default {
             console.log('🎵 handlePlaybackComplete: 所有音频播放完毕');
             
             if (this.isLoop) {
-                // 循环播放
-                console.log('🎵 handlePlaybackComplete: 循环播放，重置索引为0');
-                this.currentAudioIndex = 0;
+                // 循环播放 - 跳过导语音频
+                console.log('🎵 handlePlaybackComplete: 循环播放，查找第一个非导语音频');
+                const firstNonLeadIndex = this.findFirstNonLeadAudio();
                 
-                // 确保第一个音频有效
-                const firstAudio = this.currentPageAudios[0];
-                if (firstAudio && firstAudio.url) {
-                    this.playAudio();
+                if (firstNonLeadIndex >= 0 && firstNonLeadIndex < this.currentPageAudios.length) {
+                    this.currentAudioIndex = firstNonLeadIndex;
+                    const firstAudio = this.currentPageAudios[firstNonLeadIndex];
+                    
+                    if (firstAudio && firstAudio.url) {
+                        console.log(`🎵 handlePlaybackComplete: 循环播放从非导语音频开始，索引=${firstNonLeadIndex}, isLead=${firstAudio.isLead}`);
+                        this.playAudio();
+                    } else {
+                        console.error('🎵 handlePlaybackComplete: 第一个非导语音频数据无效，停止循环播放');
+                        this.stopPlayback();
+                    }
                 } else {
-                    console.error('🎵 handlePlaybackComplete: 第一个音频数据无效，停止循环播放');
+                    console.error('🎵 handlePlaybackComplete: 找不到有效的非导语音频，停止循环播放');
                     this.stopPlayback();
                 }
             } else {
@@ -2811,11 +2827,14 @@ export default {
                 this.currentPageAudios = cachedData.audios;
                 this.totalDuration = cachedData.totalDuration;
 
-                // 重置播放状态
-                this.currentAudioIndex = 0;
+                // 查找第一个非导语音频
+                const firstNonLeadIndex = this.findFirstNonLeadAudio();
+                this.currentAudioIndex = firstNonLeadIndex >= 0 ? firstNonLeadIndex : 0;
                 this.currentTime = 0;
                 this.isPlaying = false;
 
+                console.log(`🎵 autoPlayCachedAudio: 设置起始索引为${this.currentAudioIndex}（跳过导语）`);
+
                 // 延迟一下再开始播放，确保UI更新完成
                 setTimeout(() => {
                     this.playAudio();
@@ -2946,20 +2965,31 @@ export default {
                 return;
             }
 
-            // 检查第一个音频是否有效
-            const firstAudio = this.currentPageAudios[0];
-            if (!firstAudio || !firstAudio.url) {
+            // 查找第一个非导语音频
+            const firstNonLeadIndex = this.findFirstNonLeadAudio();
+            if (firstNonLeadIndex < 0 || firstNonLeadIndex >= this.currentPageAudios.length) {
+                console.warn('🎵 autoPlayPreloadedAudio: 找不到有效的非导语音频');
+                return;
+            }
 
+            const firstAudio = this.currentPageAudios[firstNonLeadIndex];
+            if (!firstAudio || !firstAudio.url) {
+                console.warn('🎵 autoPlayPreloadedAudio: 第一个非导语音频数据无效');
                 return;
             }
 
-            // 重置播放状态
-            this.currentAudioIndex = 0;
+            // 设置播放状态（跳过导语）
+            this.currentAudioIndex = firstNonLeadIndex;
             this.currentTime = 0;
             this.sliderValue = 0;
-            this.currentHighlightIndex = 0;
+            
+            // 设置高亮索引
+            const highlightIndex = firstAudio.originalTextIndex !== undefined ? firstAudio.originalTextIndex : firstNonLeadIndex;
+            this.currentHighlightIndex = highlightIndex;
+
+            console.log(`🎵 autoPlayPreloadedAudio: 播放第一个非导语音频，索引=${firstNonLeadIndex}, isLead=${firstAudio.isLead}`);
 
-            // 使用audioManager播放第一个音频
+            // 使用audioManager播放第一个非导语音频
             audioManager.playAudio(firstAudio.url, 'sentence', { playbackRate: this.playSpeed });
             this.isPlaying = true;