iOS 第四批反馈：隔夜重登修复 + 通知/红点/日志/扫码登他端/主屏小组件 + 长条行交互统一

- #7 隔夜被迫重新登录：auth.ts 加 refreshInFlight 单飞刷新。根因＝broker 单次轮换 refresh token + 冷启并发 401（引擎 boot 同时 startHub/refreshSessionScope/healIOSIdentity/refreshICEServers，隔夜 access 已过期全部 401）各自用同一 refresh 刷新，首个轮换、其余 replay 失效旧 token → 401 invalid → forceLogout → 清 Keychain → 重登。单飞使并发 401 共享一次轮换。
- #2 通知系统重做：删 EngineController.deviceActionStatus/clipboardStatus 两字段及设备页/设置页内联灰字（串页、不清除）；改瞬时横幅 NotificationBanner（NoticeOverlay 顶部覆盖，成功绿/失败红/信息中性、4s 自动消失、可点叉清除），设备移除/改名/剪贴板结果统一走 notify。
- #5 未读红点：EngineController unreadMessages/unreadTransfers/activeTab/seenIncomingTransfers + setActiveTab（进入对应 tab 清零）+ noteIncomingTransfer；RootView Tab .badge + onChange(selection) 同步当前页。
- #1 标签栏重排：传输 / 文件 / 消息 / 设备 / 设置（文件域相邻、设备归管理区近设置）。
- #3 日志独立界面：EngineController logs 环形缓冲（cap 300）+ clearLogs；新增 LogView（最近 N 条、分级配色、可选中、可清空），设置页引擎段「查看日志」NavigationLink。
- #8 扫码登录他端：iOS 此前仅能展示自身码被扫，缺扫描方批准能力。新增 ScannerView（VisionKit DataScannerViewController + 相机权限 + /link?r=&c= 校验）；engine/main.ts 导入 qr.ts 加 fetchLoginRequest/approveLogin/denyLogin（qrRequest/qrApprove(full,persist)/qrDeny）+ 回报 loginRequest/loginApproved/loginDenied/loginFailed；EngineController pendingLoginRequest + 方法 + handleNotify；设备页工具栏「扫码登录设备」入口 + 批准确认（展示对端名/类型/IP）。
- #6 主屏小组件 + 应用外反馈：除控制中心两控件外，新增 CloudClipboardWidget（交互式主屏/锁屏小组件，上传/拉取按钮复用同一 AppIntent）；新增 WidgetFeedback（App 外触发弹本地通知反馈）；ClipboardIntents perform 加成功/失败/空/needApp 反馈。品牌色 Color.cdropAccent 从 RootView 移入 Shared/Theme（主 app 与扩展共用）。
- 长条行交互统一：设备 / 传输历史 / 收到的文件 一致为「点按打开 + 尾部滑动删除 + 长按菜单」。设备去掉「点按即删」、加长按移除；修滑动移除时「析构按钮预演删除动画致下方设备上移又复位」的抖动（改普通按钮 + 红色，真正删除在二次确认后）；传输页 ScrollView→List 以获原生滑动删除，卡片观感经 .plain + 透明行背景 + 隐藏分隔线保留。
- i18n：3 locale 新增 ios.logs./ios.scan./ios.widget./ios.settings.viewLogs 等键并重生 iOS JSON。

ios/CDrop/Sources/Resources/i18n/en-US.json

@@ -374,5 +374,25 @@
   "ios.share.title": "Send {{n}} file(s) to a device",
   "ios.control.upload": "Upload Clipboard",
   "ios.control.pull": "Pull Clipboard",
-  "ios.control.sessionLabel": "{{name}} · Control"
+  "ios.control.sessionLabel": "{{name}} · Control",
+  "ios.settings.viewLogs": "View Logs",
+  "ios.logs.title": "Engine Logs",
+  "ios.logs.empty": "No logs yet",
+  "ios.logs.clear": "Clear Logs",
+  "ios.logs.copy": "Copy All",
+  "ios.scan.entry": "Scan to Sign In",
+  "ios.scan.title": "Scan QR Code",
+  "ios.scan.hint": "Point at the sign-in QR code on another device",
+  "ios.scan.invalid": "Unrecognized sign-in QR code",
+  "ios.scan.approveTitle": "Approve this device to sign in?",
+  "ios.scan.approve": "Approve",
+  "ios.scan.deny": "Deny",
+  "ios.scan.approved": "Device approved",
+  "ios.scan.denied": "Device denied",
+  "ios.scan.failed": "Action failed, please retry",
+  "ios.scan.cameraDenied": "Camera access is required to scan; enable it in Settings",
+  "ios.scan.requestIp": "Source IP",
+  "ios.widget.clipboardName": "Cloud Clipboard",
+  "ios.widget.clipboardDesc": "Quickly upload or pull the shared clipboard",
+  "ios.widget.needApp": "Open the app to sign in first"
 }

ios/CDrop/Sources/Resources/i18n/zh-CN.json

@@ -374,5 +374,25 @@
   "ios.share.title": "发送 {{n}} 个文件到设备",
   "ios.control.upload": "上传剪贴板",
   "ios.control.pull": "拉取剪贴板",
-  "ios.control.sessionLabel": "{{name}} · 控件"
+  "ios.control.sessionLabel": "{{name}} · 控件",
+  "ios.settings.viewLogs": "查看日志",
+  "ios.logs.title": "引擎日志",
+  "ios.logs.empty": "暂无日志",
+  "ios.logs.clear": "清空日志",
+  "ios.logs.copy": "复制全部",
+  "ios.scan.entry": "扫码登录设备",
+  "ios.scan.title": "扫码登录",
+  "ios.scan.hint": "对准另一台设备上的登录二维码",
+  "ios.scan.invalid": "无法识别的登录二维码",
+  "ios.scan.approveTitle": "批准此设备登录本账号？",
+  "ios.scan.approve": "批准登录",
+  "ios.scan.deny": "拒绝",
+  "ios.scan.approved": "已批准设备登录",
+  "ios.scan.denied": "已拒绝设备登录",
+  "ios.scan.failed": "操作失败，请重试",
+  "ios.scan.cameraDenied": "需要相机权限才能扫码，请在系统设置中开启",
+  "ios.scan.requestIp": "来源 IP",
+  "ios.widget.clipboardName": "云剪贴板",
+  "ios.widget.clipboardDesc": "快速上传或拉取设备间剪贴板",
+  "ios.widget.needApp": "请先打开 App 登录"
 }

ios/CDrop/Sources/Resources/i18n/zh-TW.json

@@ -374,5 +374,25 @@
   "ios.share.title": "傳送 {{n}} 個檔案到裝置",
   "ios.control.upload": "上傳剪貼簿",
   "ios.control.pull": "拉取剪貼簿",
-  "ios.control.sessionLabel": "{{name}} · 控制項"
+  "ios.control.sessionLabel": "{{name}} · 控制項",
+  "ios.settings.viewLogs": "檢視日誌",
+  "ios.logs.title": "引擎日誌",
+  "ios.logs.empty": "尚無日誌",
+  "ios.logs.clear": "清空日誌",
+  "ios.logs.copy": "複製全部",
+  "ios.scan.entry": "掃碼登入裝置",
+  "ios.scan.title": "掃碼登入",
+  "ios.scan.hint": "對準另一台裝置上的登入 QR 碼",
+  "ios.scan.invalid": "無法辨識的登入 QR 碼",
+  "ios.scan.approveTitle": "批准此裝置登入本帳號？",
+  "ios.scan.approve": "批准登入",
+  "ios.scan.deny": "拒絕",
+  "ios.scan.approved": "已批准裝置登入",
+  "ios.scan.denied": "已拒絕裝置登入",
+  "ios.scan.failed": "操作失敗，請重試",
+  "ios.scan.cameraDenied": "需要相機權限才能掃碼，請在系統設定中開啟",
+  "ios.scan.requestIp": "來源 IP",
+  "ios.widget.clipboardName": "雲剪貼簿",
+  "ios.widget.clipboardDesc": "快速上傳或拉取裝置間剪貼簿",
+  "ios.widget.needApp": "請先開啟 App 登入"
 }