feat: chapter runtime refactoring and related updates

- Refactor chapter runtime: replace window coordinator/snapshot with warmup orchestrator
- Update EPUB core: parser, reading session, JS bridge, navigator layout
- Update reader controller: data source, location resolution, persistence
- Update chapter runtime: data cache, loader, runtime store, disk cache, warmup orchestrator
- Remove deprecated navigation state machine and pagination state
- Update text rendering: book cache, HTML normalizer
- Update UI: text content view, dark image adjuster, text selection controller
- Update settings and reader configuration
- Add CODE_REVIEW.md and AUDIT_FINAL.md documentation
- Update pod dependencies (remove SSAlertSwift, SnapKit)
- Update podspec and pod configuration files

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

Sources/RDReaderView/EPUBCore/RDEPUBWebView.swift

@@ -33,6 +33,10 @@ final class RDEPUBAnnotationWebView: WKWebView {
 
     var onSelectionAction: ((RDEPUBAnnotationMenuAction) -> Void)?
 
+    // M-15: Backing store for UIEditMenuInteraction (iOS 16+).
+    // Stored as Any? to avoid @available on stored property restriction.
+    var _editMenuInteraction: Any?
+
     override var canBecomeFirstResponder: Bool {
         true
     }
@@ -61,6 +65,29 @@ final class RDEPUBAnnotationWebView: WKWebView {
     }
 }
 
+// MARK: - UIEditMenuInteractionDelegate (iOS 16+)
+
+@available(iOS 16.0, *)
+extension RDEPUBAnnotationWebView: UIEditMenuInteractionDelegate {
+    func editMenuInteraction(
+        _ interaction: UIEditMenuInteraction,
+        menuFor configuration: UIEditMenuConfiguration
+    ) -> UIMenu {
+        UIMenu(children: [
+            UICommand(title: "拷贝", action: #selector(rd_copy(_:))),
+            UICommand(title: "高亮", action: #selector(rd_highlight(_:))),
+            UICommand(title: "批注", action: #selector(rd_annotate(_:)))
+        ])
+    }
+
+    func editMenuInteraction(
+        _ interaction: UIEditMenuInteraction,
+        targetRectFor configuration: UIEditMenuConfiguration
+    ) -> CGRect {
+        bounds
+    }
+}
+
 public final class RDEPUBWebView: UIView {
 
     public weak var delegate: RDEPUBWebViewDelegate?
@@ -126,6 +153,11 @@ public final class RDEPUBWebView: UIView {
         fatalError("init(coder:) has not been implemented")
     }
 
+    // M-08: Retain cycle note — webView → configuration.userContentController → self (as WKScriptMessageHandler)
+    // forms a retain cycle. The cycle is broken by calling teardownWebView(), which removes
+    // the message handlers. teardownWebView() is called in reset() and deinit. IMPORTANT:
+    // deinit may never trigger if the cycle is not broken first. Every code path that disposes
+    // of this view MUST call reset() before releasing the last reference.
     deinit {
         teardownWebView()
     }