fix: 修复右对齐短文本显示不完整及多项功能改进

右对齐文本显示修复（如"巫鸿"只显示"鸿"的问题）:
- RDEPUBChapterTailNormalizer: 短尾页合并时检查 avoidPageBreakInside 语义，
  避免将带有此标记的短文本（如 right-info 署名）错误合并回上一页
- RDEPUBTextContentView: 续段归一化时跳过右对齐/居中对齐的段落，
  防止错误修改 firstLineHeadIndent 导致首字不可见
- RDEPUBCSSCompatibilityLayer: 为含 text-align:right/center 的 CSS 块
  自动注入 text-indent:0 !important，确保右对齐/居中文本无首行缩进
- RDEPUBTextRendererSupport: 排版属性归一化时将右对齐/居中段落的
  firstLineHeadIndent 重置为 0

图片查看器及脚注点击功能:
- 新增 RDEPUBImageViewController 和 RDEPUBImageViewerCoordinator，
  支持从 WebView 和 TextPage 两种模式查看图片
- epub-bridge.js: 检测图片和脚注图片的点击事件，脚注图片显示弹窗
- RDEPUBJavaScriptBridge: 新增 imageDidTap/footnoteDidTap 桥接消息
- RDEPUBWebView: 新增图片和脚注点击的 delegate 方法
- RDEPUBAttachmentNormalizer: 改进脚注检测，优先使用 alt 文本判断
- RDEPUBPaginationModels: 新增 .footnote 附件类型
- RDEPUBPageLayoutSnapshot: 运行时动态解析附件类型，脚注优先级高于图片

位置解析改进:
- RDEPUBReaderController+LocationResolution: 利用 rangeInfo 提升页码定位精度

其他:
- RDEPUBTextBookCache: schema 版本升级至 13
- RDEPUBReaderTheme: 主题更新
- Pod 项目文件更新

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

Sources/RDReaderView/EPUBCore/Models/RDEPUBPaginationModels.swift

@@ -18,6 +18,8 @@ public enum RDEPUBTextAttachmentKind: String, Codable, Equatable {
     case image
 
     case generic
+
+    case footnote
 }
 
 public struct RDEPUBTextPageMetadata: Codable, Equatable {

Sources/RDReaderView/EPUBCore/RDEPUBJavaScriptBridge.swift

@@ -14,6 +14,10 @@ enum RDEPUBJavaScriptBridgeMessage: String, CaseIterable {
     case javaScriptError = "ssReaderJSError"
 
     case fixedLayoutReady = "ssReaderFixedLayoutReady"
+
+    case imageDidTap = "ssReaderImageDidTap"
+
+    case footnoteDidTap = "ssReaderFootnoteDidTap"
 }
 
 enum RDEPUBJavaScriptBridge {
@@ -36,7 +40,9 @@ enum RDEPUBJavaScriptBridge {
                     "INTERNAL_LINK_MESSAGE": RDEPUBJavaScriptBridgeMessage.internalLink.rawValue,
                     "EXTERNAL_LINK_MESSAGE": RDEPUBJavaScriptBridgeMessage.externalLink.rawValue,
                     "JAVASCRIPT_ERROR_MESSAGE": RDEPUBJavaScriptBridgeMessage.javaScriptError.rawValue,
-                    "FIXED_LAYOUT_READY_MESSAGE": RDEPUBJavaScriptBridgeMessage.fixedLayoutReady.rawValue
+                    "FIXED_LAYOUT_READY_MESSAGE": RDEPUBJavaScriptBridgeMessage.fixedLayoutReady.rawValue,
+                    "IMAGE_DID_TAP_MESSAGE": RDEPUBJavaScriptBridgeMessage.imageDidTap.rawValue,
+                    "FOOTNOTE_DID_TAP_MESSAGE": RDEPUBJavaScriptBridgeMessage.footnoteDidTap.rawValue
                 ]
             )
         ].joined(separator: "\n\n")

Sources/RDReaderView/EPUBCore/RDEPUBWebView+JavaScriptBridge.swift

@@ -107,8 +107,43 @@ extension RDEPUBWebView: WKScriptMessageHandler {
                     self.rendered()
                 }
             }
+        case RDEPUBJavaScriptBridgeMessage.imageDidTap.rawValue:
+            guard let body = message.body as? [String: Any],
+                  let src = body["src"] as? String else { return }
+            let sourceRect = sourceRect(from: body["rect"])
+            delegate?.epubWebView(self, didTapImageWithSource: src, sourceRect: sourceRect)
+        case RDEPUBJavaScriptBridgeMessage.footnoteDidTap.rawValue:
+            guard let body = message.body as? [String: Any],
+                  let altText = body["alt"] as? String else { return }
+            let sourceRect = sourceRect(from: body["rect"])
+            delegate?.epubWebView(self, didTapFootnoteWithAltText: altText, sourceRect: sourceRect)
         default:
             break
         }
     }
+
+    private func sourceRect(from value: Any?) -> CGRect? {
+        guard let rectDict = value as? [String: Any] else { return nil }
+        return CGRect(
+            x: cgFloatValue(rectDict["x"]),
+            y: cgFloatValue(rectDict["y"]),
+            width: cgFloatValue(rectDict["width"]),
+            height: cgFloatValue(rectDict["height"])
+        )
+    }
+
+    private func cgFloatValue(_ value: Any?) -> CGFloat {
+        switch value {
+        case let number as NSNumber:
+            return CGFloat(truncating: number)
+        case let double as Double:
+            return CGFloat(double)
+        case let int as Int:
+            return CGFloat(int)
+        case let string as String:
+            return CGFloat(Double(string) ?? 0)
+        default:
+            return 0
+        }
+    }
 }

Sources/RDReaderView/EPUBCore/RDEPUBWebView.swift

@@ -17,10 +17,16 @@ public protocol RDEPUBWebViewDelegate: AnyObject {
     func epubWebView(_ webView: RDEPUBWebView, didLogJavaScriptError message: String)
 
     func epubWebViewDidFinishRendering(_ webView: RDEPUBWebView)
+
+    func epubWebView(_ webView: RDEPUBWebView, didTapImageWithSource src: String, sourceRect: CGRect?)
+
+    func epubWebView(_ webView: RDEPUBWebView, didTapFootnoteWithAltText altText: String, sourceRect: CGRect?)
 }
 
 public extension RDEPUBWebViewDelegate {
     func epubWebView(_ webView: RDEPUBWebView, didRequestSelectionAction action: RDEPUBAnnotationMenuAction) {}
+    func epubWebView(_ webView: RDEPUBWebView, didTapImageWithSource src: String, sourceRect: CGRect?) {}
+    func epubWebView(_ webView: RDEPUBWebView, didTapFootnoteWithAltText altText: String, sourceRect: CGRect?) {}
 }
 
 final class RDEPUBAnnotationWebView: WKWebView {

Sources/RDReaderView/EPUBCore/Resources/epub-bridge.js

@@ -386,6 +386,43 @@
     }, 120);
   }
   function handleDocumentClick(event) {
+    // Check for image tap. Footnote images always show the note popup; regular
+    // images inside links are left to the link handler below.
+    var img = event.target;
+    while (img && img.tagName !== 'IMG') {
+      img = img.parentElement;
+    }
+    if (img && img.tagName === 'IMG') {
+      var src = img.getAttribute('src');
+      var classes = (img.getAttribute('class') || '').toLowerCase();
+      var alt = (img.getAttribute('alt') || '').trim();
+      var isFootnote = classes.indexOf('qqreader-footnote') >= 0 || alt.length > 0;
+      if (isFootnote) {
+        event.preventDefault();
+        event.stopPropagation();
+        var footnoteRect = img.getBoundingClientRect();
+        window.webkit.messageHandlers.{{FOOTNOTE_DID_TAP_MESSAGE}}.postMessage({
+          alt: alt,
+          rect: { x: footnoteRect.x, y: footnoteRect.y, width: footnoteRect.width, height: footnoteRect.height }
+        });
+        return;
+      }
+
+      // If a regular image is inside a link, let the link handler deal with it.
+      var linkParent = img.closest ? img.closest('a[href]') : null;
+      if (!linkParent) {
+        if (src) {
+          event.preventDefault();
+          event.stopPropagation();
+          var rect = img.getBoundingClientRect();
+          window.webkit.messageHandlers.{{IMAGE_DID_TAP_MESSAGE}}.postMessage({
+            src: src,
+            rect: { x: rect.x, y: rect.y, width: rect.width, height: rect.height }
+          });
+          return;
+        }
+      }
+    }
     var anchor = event.target.closest ? event.target.closest('a[href]') : null;
     if (!anchor) { return; }
     var href = anchor.getAttribute('href');