feat: 支持 EPUB 阅读并改善规则兼容与阅读稳定性

支持 EPUB 2/3 导入、目录、封面和章节插图，保留本地书管理与阅读进度。
修复 JSON 模板、动态替换与请求参数兼容，以及 RSS 翻页和连续滚动定位。
更新编辑器工具栏和回归测试，发布版本为 0.1.12（build 18）。

Tests/LegadoReaderUITests/DarkModeUITests.swift

@@ -80,11 +80,14 @@ final class DarkModeUITests: XCTestCase {
             let keyboard = try luminances(app.keyboards.firstMatch, in: app)
             XCTAssertLessThan(keyboard[keyboard.count / 2], 0.15)
         }
-        let accessory = app.buttons["完成"]
-        let accessoryFrame = accessory.frame.intersection(app.frame)
-        if accessory.isHittable && !accessoryFrame.isNull && accessoryFrame.width > 20 && accessoryFrame.height > 20 {
-            try assertReadableDarkFill(accessory, in: app)
-        }
+        let accessory = app.buttons["syntaxCodeEditor.done"]
+        XCTAssertTrue(accessory.exists && accessory.isHittable)
+        try assertReadableDarkFill(accessory, in: app)
+        app.buttons["@"].tap()
+        XCTAssertTrue((app.textViews["syntaxCodeEditor"].value as? String)?.contains("@") == true)
+        accessory.tap()
+        let dismissed = expectation(for: NSPredicate { _, _ in !accessory.exists || !accessory.isHittable }, evaluatedWith: nil)
+        wait(for: [dismissed], timeout: 5)
     }
 
     func testDarkSettingsRulesAndManagementPages() throws {
@@ -146,8 +149,8 @@ final class DarkModeUITests: XCTestCase {
         let app = launch(["-uiDemoTab", "search", "-themeMode", "2", "-uiAutomationSearch", "深色外观检查"])
         let cancelSearch = app.buttons.matching(NSPredicate(format: "label IN %@", ["取消", "Cancel"])).firstMatch
         if cancelSearch.waitForExistence(timeout: 3) { cancelSearch.tap() }
-        XCTAssertTrue(app.buttons["搜索选项"].waitForExistence(timeout: 10))
-        app.buttons["搜索选项"].tap()
+        XCTAssertTrue(app.buttons["search.options"].waitForExistence(timeout: 10))
+        app.buttons["search.options"].tap()
         app.buttons["分组或书源"].tap()
         XCTAssertTrue(app.navigationBars["分组或书源"].waitForExistence(timeout: 5))
         try captureDarkPage(app, name: "Search group filter")