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/EPUBUI/TextPage/RDEPUBDarkImageAdjuster.swift

@@ -6,7 +6,20 @@ import DTCoreText
 
 enum RDEPUBDarkImageAdjuster {
 
-    private static let imageCache = NSCache<NSString, UIImage>()
+    private static let imageCache: NSCache<NSString, UIImage> = {
+        let cache = NSCache<NSString, UIImage>()
+        cache.countLimit = 100
+        cache.totalCostLimit = 52_428_800  // 50 MB
+        return cache
+    }()
+
+    private static func imageCost(of image: UIImage) -> Int {
+        let scale = image.scale
+        let width = Int(image.size.width * scale)
+        let height = Int(image.size.height * scale)
+        // 4 bytes per pixel (RGBA)
+        return width * height * 4
+    }
 
 #if canImport(DTCoreText)
 
@@ -84,7 +97,7 @@ enum RDEPUBDarkImageAdjuster {
             context.cgContext.setBlendMode(.sourceAtop)
             context.fill(CGRect(origin: .zero, size: image.size))
         }
-        imageCache.setObject(adjusted, forKey: cacheKey)
+        imageCache.setObject(adjusted, forKey: cacheKey, cost: imageCost(of: adjusted))
         return adjusted
     }