feat: 交互协调器拆分、附件提示、暗色图片适配、选区放大镜及文档清理

- 拆分 ContentDelegates/TextContentView 为独立协调器（InteractionCoordinator、LocationResolution、ExternalLinks、AttachmentTooltip）
- 新增 RDEPUBAttachmentTooltipView/OverlayView 附件气泡提示
- 新增 RDEPUBDarkImageAdjuster 暗色模式图片亮度适配
- 新增 RDEPUBSelectionLoupeView 选区放大镜
- 新增 MetadataParseWorker/CancellationController 元数据解析取消机制
- 重构 PresentationRuntime/PaginationCoordinator 精简职责
- 优化 ChapterLoader/WarmupOrchestrator 异步章节加载
- CFI 模块微调与 NoteModels 更新
- 清理冗余文档，更新架构/UML/业务逻辑文档

Co-Authored-By: Claude <noreply@anthropic.com>

Sources/RDReaderView/EPUBUI/ReaderController/RDEPUBReaderServices.swift

@@ -45,7 +45,7 @@ final class RDEPUBReaderServices {
     func makeChapterSummaryDiskCache(bookIdentifier: String?) -> RDEPUBChapterSummaryDiskCache {
         let cachesDirectory = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask).first
             ?? FileManager.default.temporaryDirectory
-        let bookID = (bookIdentifier ?? "default").sha256Hex
+        let bookID = (bookIdentifier ?? "default").rd_sha256Hex
         let directory = cachesDirectory
             .appendingPathComponent("RDEPUBChapterSummaryCache", isDirectory: true)
             .appendingPathComponent(bookID, isDirectory: true)