Add base infrastructure and SPM dependencies for iOS development.

Integrate SnapKit and Kingfisher, add BaseViewController and NotificationName, and streamline AGENTS.md with Android-aligned conventions.

Co-authored-by: Cursor <cursoragent@cursor.com>

suixinkan/Common/NotificationName.swift

@@ -0,0 +1,74 @@
+//
+//  NotificationName.swift
+//  suixinkan
+//
+
+import Foundation
+
+/// 工程中所有 `NotificationCenter` 通知名称的统一入口。
+/// 新增通知时只能在此文件声明，禁止在业务代码中硬编码字符串。
+enum NotificationName {
+
+    private static let prefix = "com.yuanzhixiang.suixinkan."
+
+    private static func name(_ suffix: String) -> Notification.Name {
+        Notification.Name(prefix + suffix)
+    }
+
+    // MARK: - Session
+
+    /// 用户登录成功
+    static let userDidLogin = name("userDidLogin")
+
+    /// 用户主动退出登录
+    static let userDidLogout = name("userDidLogout")
+
+    /// Token 失效或鉴权失败，需重新登录
+    static let sessionDidExpire = name("sessionDidExpire")
+
+    // MARK: - Scenic
+
+    /// 当前景区切换
+    static let scenicDidChange = name("scenicDidChange")
+
+    // MARK: - User Profile
+
+    /// 用户资料更新（头像、昵称、角色等）
+    static let userProfileDidUpdate = name("userProfileDidUpdate")
+
+    // MARK: - Message
+
+    /// 未读消息数量变化
+    static let unreadMessageCountDidChange = name("unreadMessageCountDidChange")
+
+    // MARK: - Order
+
+    /// 订单状态或列表发生变化
+    static let orderDidUpdate = name("orderDidUpdate")
+
+    // MARK: - Task
+
+    /// 任务状态或列表发生变化
+    static let taskDidUpdate = name("taskDidUpdate")
+
+    // MARK: - Scenic Queue
+
+    /// 排队叫号数据变化
+    static let scenicQueueDidUpdate = name("scenicQueueDidUpdate")
+
+    // MARK: - Voice Call
+
+    /// 语音通话状态变化
+    static let voiceCallStateDidChange = name("voiceCallStateDidChange")
+}
+
+/// `Notification.userInfo` 字典键的统一入口。
+enum NotificationUserInfoKey {
+
+    static let scenicId = "scenicId"
+    static let scenicName = "scenicName"
+    static let orderId = "orderId"
+    static let taskId = "taskId"
+    static let unreadCount = "unreadCount"
+    static let voiceCallState = "voiceCallState"
+}