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/LargeBookOnDemandTests.swift

@@ -50,9 +50,10 @@ final class LargeBookOnDemandTests: XCTestCase {
         app.launchAndOpenSampleBook(bookTitleQuery: largeBookQuery, resetsReaderState: true)
         app.waitForReader(timeout: 20)
 
-        _ = app.waitForDemoReaderState(timeout: 60, description: "首次打开完成全书缓存") { state in
+        let firstFullState = app.waitForDemoReaderState(timeout: 60, description: "首次打开完成全书缓存") { state in
             state.mode == "bookPageMap" && state.pagination == "full" && (state.buildableChapters ?? 0) > 0
         }
+        XCTAssertGreaterThan(firstFullState.cacheFiles ?? 0, 0, "首次全量解析后应生成章节摘要缓存")
 
         app.showReaderChromeIfNeeded()
         XCTAssertTrue(app.buttons[IDs.readerBack].waitForExistence(timeout: 5), "返回按钮不存在")
@@ -68,6 +69,47 @@ final class LargeBookOnDemandTests: XCTestCase {
 
         XCTAssertEqual(reopenedState.pagination, "full")
         XCTAssertEqual(reopenedState.knownChapters, reopenedState.buildableChapters)
+        XCTAssertEqual(reopenedState.knownPages, firstFullState.knownPages, "二开命中缓存后总页数应稳定一致")
+    }
+
+    func testCorruptedCacheFallsBackGracefully() throws {
+        app.launchAndOpenSampleBook(bookTitleQuery: largeBookQuery, resetsReaderState: true, clearsCache: true)
+        app.waitForReader(timeout: 20)
+        _ = app.waitForDemoReaderState(timeout: 60, description: "首次打开完成缓存建立") { state in
+            state.pagination == "full" && (state.cacheFiles ?? 0) > 0
+        }
+
+        app.showReaderChromeIfNeeded()
+        app.buttons[IDs.readerBack].tap()
+        XCTAssertTrue(app.tables[IDs.demoBooksTable].waitForExistence(timeout: 5))
+
+        app.launchAndOpenSampleBook(bookTitleQuery: largeBookQuery, resetsReaderState: false, corruptsCache: true)
+        app.waitForReader(timeout: 20)
+
+        let recoveredState = app.waitForDemoReaderState(timeout: 45, description: "损坏缓存后仍可恢复阅读") { state in
+            state.isOpened && state.pagination != "none" && state.mode == "bookPageMap"
+        }
+        XCTAssertEqual(recoveredState.lastError, "none", "缓存损坏不应导致阅读器进入错误状态")
+    }
+
+    func testClearingCacheForcesRebuild() throws {
+        app.launchAndOpenSampleBook(bookTitleQuery: largeBookQuery, resetsReaderState: true, clearsCache: true)
+        app.waitForReader(timeout: 20)
+        _ = app.waitForDemoReaderState(timeout: 60, description: "首次缓存建立") { state in
+            state.pagination == "full" && (state.cacheFiles ?? 0) > 0
+        }
+
+        app.showReaderChromeIfNeeded()
+        app.buttons[IDs.readerBack].tap()
+        XCTAssertTrue(app.tables[IDs.demoBooksTable].waitForExistence(timeout: 5))
+
+        app.launchAndOpenSampleBook(bookTitleQuery: largeBookQuery, resetsReaderState: false, clearsCache: true)
+        app.waitForReader(timeout: 20)
+
+        let rebuiltState = app.waitForDemoReaderState(timeout: 60, description: "清空缓存后重新构建") { state in
+            state.pagination == "full" && (state.cacheFiles ?? 0) > 0
+        }
+        XCTAssertGreaterThan(rebuiltState.cacheFiles ?? 0, 0, "清空缓存后应重新写入缓存文件")
     }
 
     func testMiddleChapterOpenPositionStableAfterFullParse() throws {
@@ -146,7 +188,7 @@ final class LargeBookOnDemandTests: XCTestCase {
     func testLargeBookContinuousPagingExtendsKnownPageMap() throws {
         app.launchAndOpenSampleBook(bookTitleQuery: largeBookQuery, displayType: "scroll", resetsReaderState: true)
         app.waitForReader(timeout: 20)
-        app.waitForReaderState(containing: "display=horizontalScroll", timeout: 8)
+        app.waitForDemoReaderState(timeout: 8, description: "display=horizontalScroll") { $0.display == "horizontalScroll" }
 
         let initialState = app.waitForDemoReaderState(timeout: 15, description: "初始局部分页") { state in
             state.mode == "bookPageMap" && state.knownPages != nil && state.page != nil