feat: EPUB 阅读器搜索、选中注释、书签 chrome 状态及大量重构优化

- 新增 RDEPUBReaderSearchCoordinator 与 RDEPUBSelectionState 管理搜索和选中状态
- 新增 BookmarkChromeStateTests、NavigationBackwardTests、SelectionAnnotateTests 等 UI 测试
- 新增多个边界测试 epub 样本（损坏结构、空归档、缺失文件、流式外链验证）
- 重构阅读器 chrome 状态管理，统一 tool bar 与 search bar 交互
- 优化大书分页缓存策略（RDEPUBChapterSummaryDiskCache、RDEPUBPageCountCache）
- 移除废弃的 RDEPUBLocationConverter 和 RDEPUBPageBreakPolicy
- 更新 epub-bridge.js 与 JS bridge 通信协议
- 全面更新现有 UI 测试以适配新的 helper 和状态管理

ReadViewDemo/ReadViewDemoUITests/ReaderUITests/SettingsEffectTests.swift

@@ -10,7 +10,7 @@ final class SettingsEffectTests: XCTestCase {
     func testFontSizeChangeUpdatesContent() throws {
         app.launchAndOpenSampleBook()
         app.waitForReader(timeout: 12)
-        app.waitForReaderState(containing: "page=", timeout: 5)
+        app.waitForDemoReaderState(timeout: 5, description: "page exists") { $0.page != nil }
 
         app.showReaderChromeIfNeeded()
         XCTAssertTrue(app.buttons[IDs.readerSettings].waitForExistence(timeout: 3), "设置按钮不存在")
@@ -23,7 +23,7 @@ final class SettingsEffectTests: XCTestCase {
         XCTAssertTrue(app.buttons[IDs.settingsDone].waitForExistence(timeout: 3), "完成按钮不存在")
         app.buttons[IDs.settingsDone].tap()
 
-        app.waitForReaderState(containing: "reader=opened", timeout: 8)
+        app.waitForDemoReaderState(timeout: 8, description: "reader=opened") { $0.isOpened }
     }
 
     func testThemeSwitchChangesBackground() throws {
@@ -59,7 +59,7 @@ final class SettingsEffectTests: XCTestCase {
         }
 
         app.buttons[IDs.settingsDone].tap()
-        app.waitForReaderState(containing: "reader=opened", timeout: 8)
+        app.waitForDemoReaderState(timeout: 8, description: "reader=opened") { $0.isOpened }
     }
 
     func testLineHeightChangeUpdatesContent() throws {
@@ -76,13 +76,13 @@ final class SettingsEffectTests: XCTestCase {
         }
 
         app.buttons[IDs.settingsDone].tap()
-        app.waitForReaderState(containing: "reader=opened", timeout: 8)
+        app.waitForDemoReaderState(timeout: 8, description: "reader=opened") { $0.isOpened }
     }
 
     func testDisplayTypeChangeRePaginates() throws {
         app.launchAndOpenSampleBook(displayType: "horizontalscroll")
         app.waitForReader(timeout: 12)
-        app.waitForReaderState(containing: "display=horizontalScroll", timeout: 5)
+        app.waitForDemoReaderState(timeout: 5, description: "display=horizontalScroll") { $0.display == "horizontalScroll" }
 
         app.showReaderChromeIfNeeded()
         app.buttons[IDs.readerSettings].tap()
@@ -94,7 +94,7 @@ final class SettingsEffectTests: XCTestCase {
         }
 
         app.buttons[IDs.settingsDone].tap()
-        app.waitForReaderState(containing: "display=", timeout: 8)
+        app.waitForDemoReaderState(timeout: 8, description: "display changed") { $0.display != nil }
     }
 
     func testDefaultBodyPaginationDoesNotEnableWidowOrphanCompaction() throws {
@@ -141,4 +141,60 @@ final class SettingsEffectTests: XCTestCase {
 
         app.buttons[IDs.settingsDone].tap()
     }
+
+    func testThemeSelectionPersistsAfterReopen() throws {
+        app.launchAndOpenSampleBook(resetsReaderState: true)
+        app.waitForReader(timeout: 12)
+
+        app.showReaderChromeIfNeeded()
+        app.buttons[IDs.readerSettings].tap()
+
+        let darkThemeButton = app.buttons[IDs.settingsTheme(5)]
+        XCTAssertTrue(darkThemeButton.waitForExistence(timeout: 5))
+        darkThemeButton.tap()
+        XCTAssertEqual(darkThemeButton.value as? String, "selected", "切换主题后当前主题按钮应为选中态")
+        app.buttons[IDs.settingsDone].tap()
+
+        app.showReaderChromeIfNeeded()
+        app.buttons[IDs.readerBack].tap()
+
+        app.launchAndOpenSampleBook(resetsReaderState: false)
+        app.waitForReader(timeout: 12)
+        app.showReaderChromeIfNeeded()
+        app.buttons[IDs.readerSettings].tap()
+
+        let reopenedDarkThemeButton = app.buttons[IDs.settingsTheme(5)]
+        XCTAssertTrue(reopenedDarkThemeButton.waitForExistence(timeout: 5))
+        XCTAssertEqual(reopenedDarkThemeButton.value as? String, "selected", "主题应在重启后保持选中")
+        app.buttons[IDs.settingsDone].tap()
+    }
+
+    func testFontChoiceChangePersistsAfterReopen() throws {
+        app.launchAndOpenSampleBook(resetsReaderState: true)
+        app.waitForReader(timeout: 12)
+
+        app.showReaderChromeIfNeeded()
+        app.buttons[IDs.readerSettings].tap()
+
+        let fontChoiceControl = app.segmentedControls[IDs.settingsFontChoice]
+        XCTAssertTrue(fontChoiceControl.waitForExistence(timeout: 5))
+        if fontChoiceControl.buttons.count > 1 {
+            fontChoiceControl.buttons.element(boundBy: 1).tap()
+        }
+        XCTAssertEqual(fontChoiceControl.value as? String, "宋体", "切换字体后当前字体值应更新")
+        app.buttons[IDs.settingsDone].tap()
+
+        app.showReaderChromeIfNeeded()
+        app.buttons[IDs.readerBack].tap()
+
+        app.launchAndOpenSampleBook(resetsReaderState: false)
+        app.waitForReader(timeout: 12)
+        app.showReaderChromeIfNeeded()
+        app.buttons[IDs.readerSettings].tap()
+
+        let reopenedFontChoiceControl = app.segmentedControls[IDs.settingsFontChoice]
+        XCTAssertTrue(reopenedFontChoiceControl.waitForExistence(timeout: 5))
+        XCTAssertEqual(reopenedFontChoiceControl.value as? String, "宋体", "字体选择应在重启后保持")
+        app.buttons[IDs.settingsDone].tap()
+    }
 }