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/ReaderView/RDReaderView.swift

@@ -267,6 +267,10 @@ public class RDReaderView: UIView {
         set { pagingController.pendingTransitionRequest = newValue }
     }
 
+    var isPageCurlTransitioning: Bool {
+        currentDisplayType == .pageCurl && pagingController.isTransitioning
+    }
+
     override init(frame: CGRect) {
         super.init(frame: frame)
         accessibilityIdentifier = "epub.reader.content"
@@ -401,6 +405,8 @@ public class RDReaderView: UIView {
         if let pending = pagingController.finishPageCurlTransition() {
             transitionToPage(pageNum: pending.pageNum, animated: pending.animated)
         }
+
+        updatePagingInteractionSuppression()
     }
 
     private var preloadEnvironment: RDReaderPreloadController.Environment {
@@ -603,12 +609,24 @@ public class RDReaderView: UIView {
     }
 
     private func updatePagingInteractionSuppression() {
-        let shouldSuppress = selectionPagingSuppressedContentViews.allObjects.isEmpty == false
+        let shouldSuppress = activePagingSuppressionContentViews().isEmpty == false
         guard shouldSuppress != isPagingInteractionSuppressed else { return }
         isPagingInteractionSuppressed = shouldSuppress
         setPagingInteractionEnabled(!shouldSuppress)
     }
 
+    private func activePagingSuppressionContentViews() -> [UIView] {
+        selectionPagingSuppressedContentViews.allObjects.filter { contentView in
+            guard contentView.window != nil,
+                  contentView.isDescendant(of: self),
+                  contentView.bounds.isEmpty == false else {
+                return false
+            }
+            let frameInReader = contentView.convert(contentView.bounds, to: self)
+            return frameInReader.intersects(bounds)
+        }
+    }
+
     private func setPagingInteractionEnabled(_ isEnabled: Bool) {
         collectionView.isScrollEnabled = isEnabled
         pageViewController.gestureRecognizers.forEach { $0.isEnabled = isEnabled }
@@ -721,7 +739,13 @@ public class RDReaderView: UIView {
     }
 
     public func reloadPageCountOnly() {
-        collectionView.reloadData()
+        if currentDisplayType == .pageCurl {
+            if !isPageCurlTransitioning, currentPage >= 0, numberOfPages() > 0 {
+                transitionToPage(pageNum: currentPage, animated: false)
+            }
+        } else {
+            collectionView.reloadData()
+        }
         topToolView = resolvedTopChromeView()
         bottomToolView = resolvedBottomChromeView()
     }