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/ReaderController/RDEPUBBackgroundPriorityPolicy.swift

@@ -63,6 +63,7 @@ final class RDEPUBBackgroundPriorityManager {
     private(set) var policy: RDEPUBBackgroundPriorityPolicy
 
     private var warmAnchors: [RDEPUBWarmJumpAnchor] = []
+    private let warmAnchorsLock = NSLock()
 
     private(set) var currentGeneration: Int = 0
 
@@ -84,11 +85,13 @@ final class RDEPUBBackgroundPriorityManager {
             sequenceNumber: currentGeneration
         )
 
+        warmAnchorsLock.lock()
         warmAnchors.insert(anchor, at: 0)
 
         if warmAnchors.count > policy.maxWarmJumpAnchors {
             warmAnchors = Array(warmAnchors.prefix(policy.maxWarmJumpAnchors))
         }
+        warmAnchorsLock.unlock()
 
         currentGeneration += 1
         coldCursor = 0 
@@ -103,10 +106,17 @@ final class RDEPUBBackgroundPriorityManager {
         let uncachedIndices = allBuildableIndices.filter { !cachedSpineIndices.contains($0) }
         guard !uncachedIndices.isEmpty else { return [] }
 
+        // M-03: Snapshot warmAnchors under lock since it's written on main thread
+        // and read on background thread.
+        warmAnchorsLock.lock()
+        let warmAnchorsSnapshot = warmAnchors
+        warmAnchorsLock.unlock()
+
         let items = uncachedIndices.map { spineIndex -> (spineIndex: Int, band: RDEPUBPriorityBand) in
             let band = classifySpineIndex(
                 spineIndex: spineIndex,
-                currentSpineIndex: currentSpineIndex
+                currentSpineIndex: currentSpineIndex,
+                warmAnchors: warmAnchorsSnapshot
             )
             return (spineIndex, band)
         }
@@ -131,7 +141,8 @@ final class RDEPUBBackgroundPriorityManager {
 
     private func classifySpineIndex(
         spineIndex: Int,
-        currentSpineIndex: Int?
+        currentSpineIndex: Int?,
+        warmAnchors: [RDEPUBWarmJumpAnchor]
     ) -> RDEPUBPriorityBand {
 
         if let current = currentSpineIndex {
@@ -152,11 +163,15 @@ final class RDEPUBBackgroundPriorityManager {
     }
 
     func currentWarmAnchors() -> [RDEPUBWarmJumpAnchor] {
-        warmAnchors
+        warmAnchorsLock.lock()
+        defer { warmAnchorsLock.unlock() }
+        return warmAnchors
     }
 
     func reset() {
+        warmAnchorsLock.lock()
         warmAnchors.removeAll()
+        warmAnchorsLock.unlock()
         currentGeneration = 0
         coldCursor = 0
     }