fix epub reader playback and trial navigation

Sources/RDEpubReaderView/EPUBUI/RDEPUBReaderController+DataSource.swift

@@ -15,6 +15,18 @@ extension RDEPUBReaderController: RDEpubReaderDataSource, RDEpubReaderPageProvid
         pageIdentifier(readerView: readerView, pageNum: index)
     }
 
+    public func readerView(
+        _ readerView: RDEpubReaderView,
+        shouldPreloadPageAt index: Int
+    ) -> Bool {
+        // 试读墙由宿主提供唯一 UIView，不允许预加载创建另一容器并抢走它。
+        guard index != trialWallPageIndex else { return false }
+        // 交互型固定版式页会在文档加载阶段触发页内音频/时间轴。
+        // 预加载会把相邻章节一并载入，导致当前章打开时多段音频同时播放。
+        // 这些页面只在真正展示时再创建，确保仅当前查看章节发声。
+        return request(for: index)?.isFixedLayout != true
+    }
+
     public func readerViewTopChrome(_ readerView: RDEpubReaderView) -> UIView? {
         topToolView(readerView: readerView)
     }
@@ -66,6 +78,7 @@ extension RDEPUBReaderController: RDEpubReaderDataSource, RDEpubReaderPageProvid
                     pageNumber: pageNum + 1,
                     totalPages: pageCountOfReaderView(readerView: readerView),
                     configuration: configuration,
+                    contentInsets: readerContext.currentTextContentInsets(pageIndex: pageNum),
                     chapterCFIMap: resolvedPage.chapter.chapterOffsetMap.cfiMap,
                     chapterFragmentOffsets: resolvedPage.chapter.chapterOffsetMap.fragmentOffsets,
                     highlights: textHighlights(for: resolvedPage.page),
@@ -89,7 +102,8 @@ extension RDEPUBReaderController: RDEpubReaderDataSource, RDEpubReaderPageProvid
             contentView.configureLoading(
                 pageNumber: pageNum + 1,
                 totalPages: pageCountOfReaderView(readerView: readerView),
-                configuration: configuration
+                configuration: configuration,
+                contentInsets: readerContext.currentTextContentInsets(pageIndex: pageNum)
             )
             return contentView
         }
@@ -111,6 +125,7 @@ extension RDEPUBReaderController: RDEpubReaderDataSource, RDEpubReaderPageProvid
                 pageNumber: pageNum + 1,
                 totalPages: textBook.pages.count,
                 configuration: configuration,
+                contentInsets: readerContext.currentTextContentInsets(pageIndex: pageNum),
                 chapterCFIMap: textBook.chapterData(for: page.href)?.chapter.cfiMap,
                 chapterFragmentOffsets: textBook.chapterData(for: page.href)?.chapter.fragmentOffsets ?? [:],
                 highlights: textHighlights(for: page),