feat: 设置面板与章节运行时联动优化

- 设置页打开时仅重新计算当前章节预览，关闭后触发完整补全
- 新增 preview 加载优先级，支持设置页内当前章预览
- 添加设置页防抖机制，合并连续字号/行距变更
- 支持下滑手势关闭设置页，通过 presentation delegate 通知运行时
- 重新分页时跳过导航和尺寸校验，避免状态冲突
- currentTextPageSize 线程安全优化，后台线程使用缓存尺寸
- 更新 CocoaPods 依赖

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ReadViewDemo/Pods/Local Podspecs/RDReaderView.podspec.json

@@ -27,9 +27,15 @@
     "ZIPFoundation": [
       "~> 0.9"
     ],
-    "DTCoreText": [],
-    "SnapKit": [],
-    "SSAlertSwift": []
+    "DTCoreText": [
+
+    ],
+    "SnapKit": [
+
+    ],
+    "SSAlertSwift": [
+
+    ]
   },
   "requires_arc": true,
   "swift_version": "5.10"

ReadViewDemo/Pods/Manifest.lock

@@ -43,7 +43,7 @@ EXTERNAL SOURCES:
 SPEC CHECKSUMS:
   DTCoreText: 11b7fe2104f476f82e75a4e3dbdde74d7186cecb
   DTFoundation: 76b624967cf5bcaae6bb057d622c536c36ef36d0
-  RDReaderView: 54205c82c62ea6c674b43c833642d2643c98c573
+  RDReaderView: 617ec758a5db3c10024acf83b110465ea8343b5b
   SnapKit: d612e99e678a2d3b95bf60b0705ed0a35c03484a
   SSAlertSwift: aad8dc0c20b36fcffe700b81d7be89d60c7ba4f1
   ZIPFoundation: dfd3d681c4053ff7e2f7350bc4e53b5dba3f5351