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/ChapterRuntime/RDEPUBChapterSummaryDiskCache.swift

@@ -119,7 +119,7 @@ final class RDEPUBChapterSummaryDiskCache {
         let bookPrefix = Self.cacheNamespacePrefix(for: key.bookID)
         let renderPrefix = Self.cacheNamespacePrefix(for: key.renderSignature)
         let rawKey = "\(key.bookID)_\(key.spineIndex)_\(key.renderSignature)_\(key.chapterContentHash)"
-        let digest = rawKey.sha256Hex
+        let digest = rawKey.rd_sha256Hex
         return cacheDirectory.appendingPathComponent("\(bookPrefix)__\(renderPrefix)__\(digest).json")
     }
 
@@ -150,7 +150,7 @@ final class RDEPUBChapterSummaryDiskCache {
     }
 
     private static func cacheNamespacePrefix(for rawValue: String) -> String {
-        rawValue.sha256Hex.prefix(12).lowercased()
+        rawValue.rd_sha256Hex.prefix(12).lowercased()
     }
 }