feat: EPUB阅读器搜索、注释、CFI模块及大书远距跳转优化

- 实现EPUB阅读器搜索功能及选中注释功能
- 优化CFI模块，修复代码审查发现的11个问题
- 实现大书远距目录跳转与后台补全优化方案
- 优化设置面板与章节运行时联动
- 重构及大量改进优化

Sources/RDReaderView/EPUBUI/RDEPUBReaderSearchBarView.swift

@@ -1,26 +1,33 @@
 import UIKit
 
 struct RDEPUBReaderSearchSection: Equatable {
+
     struct Item: Equatable {
+
         let matchIndex: Int
+
         let previewText: String
+
         let isCurrent: Bool
     }
 
     let title: String
+
     let items: [Item]
 }
 
-// MARK: - 搜索面板
-
-/// 阅读器搜索面板
-/// 提供底部抽屉式搜索输入、分组结果列表和匹配跳转能力。
 final class RDEPUBReaderSearchBarView: RDEPUBReaderToolView {
+
     var onSearchSubmit: ((String) -> Void)?
+
     var onSearchTextChanged: ((String) -> Void)?
+
     var onSearchPrevious: (() -> Void)?
+
     var onSearchNext: (() -> Void)?
+
     var onSelectMatch: ((Int) -> Void)?
+
     var onClose: (() -> Void)?
 
     let textField: UITextField = {
@@ -39,23 +46,35 @@ final class RDEPUBReaderSearchBarView: RDEPUBReaderToolView {
     }()
 
     private let backgroundButton = UIButton(type: .custom)
+
     private let panelView = UIView()
+
     private let grabberView = UIView()
+
     private let searchRowView = UIView()
+
     private let searchFieldContainer = UIView()
+
     private let searchIcon = UIImageView()
+
     private let searchFieldDivider = UIView()
+
     private let cancelButton = UIButton(type: .system)
+
     private let tableView = UITableView(frame: .zero, style: .plain)
+
     private let emptyStateLabel = UILabel()
 
-    // Preserve legacy accessibility hooks used by existing tests and demo logic.
     private let previousButton = RDEPUBReaderTintButton(type: .system)
+
     private let nextButton = RDEPUBReaderTintButton(type: .system)
+
     private let countLabel = UILabel()
 
     private var searchSections: [RDEPUBReaderSearchSection] = []
+
     private var keyword = ""
+
     private var currentMatchIndex: Int?
 
     override init(frame: CGRect) {
@@ -221,7 +240,6 @@ final class RDEPUBReaderSearchBarView: RDEPUBReaderToolView {
         searchFieldContainer.addSubview(searchIcon)
         searchFieldContainer.addSubview(textField)
 
-        // Legacy shims
         addSubview(previousButton)
         addSubview(nextButton)
         addSubview(countLabel)
@@ -405,6 +423,7 @@ final class RDEPUBReaderSearchBarView: RDEPUBReaderToolView {
 }
 
 private extension UIColor {
+
     var rd_searchIsDarkBackground: Bool {
         var red: CGFloat = 0
         var green: CGFloat = 0
@@ -419,6 +438,7 @@ private extension UIColor {
 }
 
 extension RDEPUBReaderSearchBarView: UITableViewDataSource, UITableViewDelegate {
+
     func numberOfSections(in tableView: UITableView) -> Int {
         searchSections.count
     }
@@ -485,6 +505,7 @@ extension RDEPUBReaderSearchBarView: UITableViewDataSource, UITableViewDelegate
 }
 
 extension RDEPUBReaderSearchBarView: UITextFieldDelegate {
+
     func textFieldShouldClear(_ textField: UITextField) -> Bool {
         DispatchQueue.main.async { [weak self] in
             self?.onSearchTextChanged?("")
@@ -494,15 +515,21 @@ extension RDEPUBReaderSearchBarView: UITextFieldDelegate {
 }
 
 private final class RDEPUBReaderSearchResultCell: UITableViewCell {
+
     static let reuseIdentifier = "RDEPUBReaderSearchResultCell"
 
     static var cardBackgroundColor = UIColor(white: 0.12, alpha: 1)
+
     static var activeCardBackgroundColor = UIColor(red: 0.17, green: 0.28, blue: 0.38, alpha: 1)
+
     static var primaryTextColor = UIColor(white: 0.96, alpha: 1)
+
     static var highlightTextColor = UIColor.systemBlue
+
     static var activeHighlightTextColor = UIColor(red: 0.40, green: 0.77, blue: 1, alpha: 1)
 
     private let cardView = UIView()
+
     private let previewLabel = UILabel()
 
     override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {