长章节内存优化 P0：每页子串改按需构造并新增内存打点

- RDEPUBTextPage.content 由存储属性改为基于 chapterContent+contentRange 的计算属性，三处构造点不再生成每页子串，章节缓存窗口内每章少一份整章文本常驻副本 - 新增 RDEPUBMemoryProbe（--demo-memory-probe 开启），在章节插入、每 20 次翻页、设置失效、转屏完成时输出 phys_footprint - shouldAvoidReaderPageCaching 补注释，锁定放开前置条件为 P1-1 - 新增实施清单文档 LONG_CHAPTER_MEMORY_OPTIMIZATION_PLAN.md 并勾选 P0 验证：Demo 编译通过；UI 回归 9/9 通过（PageNavigation/ ReaderOpenClose/LargeBookOnDemand） Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-08 15:34:45 +09:00
parent 5a41066b66
commit e4e629a06c
12 changed files with 1475 additions and 1258 deletions
@@ -322,6 +322,9 @@ final class RDEPUBTextContentView: UIView, UIGestureRecognizerDelegate, RDReader
        // layouter alive for the visible page. Avoid reader-level page
        // caching so preloading does not retain several full-chapter
        // display copies at once.
+        // Do NOT relax this until chapter-level shared display content
+        // lands (LONG_CHAPTER_MEMORY_OPTIMIZATION_PLAN.md P1-1): cached
+        // pages would each pin their own full-chapter copy again.
        return currentPage == nil
            || loadingSpinner.isAnimating
            || coreTextDisplayContent != nil