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/RDEPUBReaderContext.swift

@@ -83,9 +83,9 @@ final class RDEPUBReaderContext {
         set { state.searchState = newValue }
     }
 
-    var pendingFullPageMap: RDEPUBBookPageMap? {
-        get { state.pendingFullPageMap }
-        set { state.pendingFullPageMap = newValue }
+    var pendingPageMapUpdates: [RDEPUBPendingPageMapUpdate] {
+        get { state.pendingPageMapUpdates }
+        set { state.pendingPageMapUpdates = newValue }
     }
 
     var lastTextPaginationPageSize: CGSize? {
@@ -249,7 +249,7 @@ final class RDEPUBReaderContext {
            let publication,
            publication.spine.indices.contains(spineIndex) {
             let href = publication.spine[spineIndex].href
-            contentHash = parser.htmlString(forRelativePath: href)?.sha256Hex ?? ""
+            contentHash = parser.htmlString(forRelativePath: href)?.rd_sha256Hex ?? ""
         } else {
             contentHash = ""
         }