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

ReadViewDemo/ReadViewDemoUITests/Helpers/DemoReaderState.swift

@@ -21,6 +21,11 @@ struct DemoReaderState {
         fields[key]
     }
 
+    private func decodedField(_ key: String) -> String? {
+        guard let rawValue = fields[key], rawValue != "nil" else { return nil }
+        return rawValue.removingPercentEncoding ?? rawValue
+    }
+
     var isOpened: Bool { fields["reader"] == "opened" }
     var page: Int? { fields["page"].flatMap(Int.init) }
     var display: String? { fields["display"] }
@@ -28,8 +33,11 @@ struct DemoReaderState {
     var highlights: Int? { fields["highlights"].flatMap(Int.init) }
     var bookmarks: Int? { fields["bookmarks"].flatMap(Int.init) }
     var selection: Int? { fields["selection"].flatMap(Int.init) }
-    var href: String? { fields["href"] }
+    var href: String? { decodedField("href") }
     var progression: Double? { fields["progression"].flatMap(Double.init) }
+    var cfi: String? { decodedField("cfi") }
+    var lastCFI: String? { decodedField("lastCFI") }
+    var rangeCFI: String? { decodedField("rangeCFI") }
     var mode: String? { fields["mode"] }
     var pagination: String? { fields["pagination"] }
     var knownPages: Int? { fields["knownPages"].flatMap(Int.init) }
@@ -47,9 +55,9 @@ struct DemoReaderState {
     var cacheFiles: Int? { fields["cacheFiles"].flatMap(Int.init) }
     var cacheBytes: Int? { fields["cacheBytes"].flatMap(Int.init) }
     var externalLinks: Int? { fields["externalLinks"].flatMap(Int.init) }
-    var lastExternalURL: String? { fields["lastExternalURL"] }
-    var lastError: String? { fields["lastError"] }
-    var searchMatchText: String? { fields["searchMatchText"] }
+    var lastExternalURL: String? { decodedField("lastExternalURL") }
+    var lastError: String? { decodedField("lastError") }
+    var searchMatchText: String? { decodedField("searchMatchText") }
 }
 
 extension XCUIApplication {