Add per-chapter auto skip intro/outro for web player

Per-book skip settings stored in browser localStorage. Checks each
chapter's intro/outro zone during playback and automatically seeks
past them, matching the behavior of the Android app implementation.

client/components/app/MediaPlayerContainer.vue

@@ -308,6 +308,9 @@ export default {
       if (this.sleepTimerType === this.$constants.SleepTimerTypes.CHAPTER && this.sleepTimerSet) {
         this.checkChapterEnd()
       }
+      
+      // 检查章节intro/outro跳过
+      this.checkAndSkipIntroOutro(time)
     },
     setDuration(duration) {
       this.totalDuration = duration
@@ -543,6 +546,81 @@ export default {
         this.playerHandler.resetPlayer() // Closes player without reporting to server
         this.$store.commit('setMediaPlaying', null)
       }
+    },
+    
+    // 获取当前书籍的跳过设置
+    getBookSkipSettings() {
+      if (!this.streamLibraryItem) return null
+      const bookSkipSettings = this.$store.getters['user/getUserSetting']('bookSkipSettings') || {}
+      return bookSkipSettings[this.streamLibraryItem.id] || {}
+    },
+
+    // 检查并执行章节intro/outro跳过
+    checkAndSkipIntroOutro(currentTime) {
+      const skipSettings = this.getBookSkipSettings()
+      if (!skipSettings) return
+
+      const doSkipIntro = skipSettings.skipIntro && skipSettings.introDuration > 0
+      const doSkipOutro = skipSettings.skipOutro && skipSettings.outroDuration > 0
+      if (!doSkipIntro && !doSkipOutro) return
+      if (!this.isPlaying || !this.chapters.length) return
+
+      // 防重入：正在跳过时等待到达目标位置后再解除
+      if (this._isSkipping) {
+        if (this._skipTarget != null && currentTime >= this._skipTarget - 0.5) {
+          this._isSkipping = false
+          this._skipTarget = null
+        }
+        return
+      }
+
+      const chapter = this.chapters.find((ch) => ch.start <= currentTime && currentTime < ch.end)
+      if (!chapter) return
+
+      const introDuration = doSkipIntro ? skipSettings.introDuration : 0
+      const outroDuration = doSkipOutro ? skipSettings.outroDuration : 0
+
+      const introEndTime = Math.min(chapter.start + introDuration, chapter.end)
+      const outroStartTime = Math.max(chapter.end - outroDuration, chapter.start)
+
+      // 短章节：intro和outro区间重叠则不跳
+      if (doSkipIntro && doSkipOutro && introEndTime > outroStartTime) return
+
+      // 检查是否在intro区间
+      if (doSkipIntro && currentTime < introEndTime) {
+        const target = introEndTime + 0.5
+        this._isSkipping = true
+        this._skipTarget = target
+        this.seek(target)
+        return
+      }
+
+      // 检查是否在outro区间
+      if (doSkipOutro && currentTime >= outroStartTime) {
+        const chapterIndex = this.chapters.indexOf(chapter)
+        const nextChapter = this.chapters[chapterIndex + 1]
+
+        if (nextChapter) {
+          // 有下一章：跳到下一章开头（如果同时开了skipIntro则跳过intro）
+          let target = nextChapter.start
+          if (doSkipIntro) {
+            const nextIntroEnd = Math.min(nextChapter.start + introDuration, nextChapter.end)
+            const nextOutroStart = Math.max(nextChapter.end - outroDuration, nextChapter.start)
+            // 确保下一章intro/outro不重叠
+            if (nextIntroEnd <= nextOutroStart) {
+              target = nextIntroEnd + 0.5
+            }
+          }
+          this._isSkipping = true
+          this._skipTarget = target
+          this.seek(target)
+        } else {
+          // 最后一章：跳到结尾，触发播放完成
+          this._isSkipping = true
+          this._skipTarget = chapter.end
+          this.seek(chapter.end)
+        }
+      }
     }
   },
   mounted() {