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/EPUBCore/RDEPUBReadingSession.swift

@@ -261,7 +261,11 @@ public final class RDEPUBReadingSession {
             href: location.href,
             progression: location.progression,
             lastProgression: location.lastProgression,
-            fragment: location.fragment
+            fragment: location.fragment,
+            rangeAnchor: location.rangeAnchor,
+            cfi: location.cfi,
+            lastCFI: location.lastCFI,
+            rangeCFI: location.rangeCFI
         )
 
         let resource = RDEPUBViewportResource(