feat: 重造领域模型并对齐 android（home/checkin/plan/profile/session）

IosClientKit/Sources/CoreModel/Checkin.swift

@@ -0,0 +1,72 @@
+import Foundation
+
+/// 打卡状态（对应小程序 STATUSES / android CheckinStatus）。
+public enum CheckinStatus: String, CaseIterable, Hashable, Sendable {
+    case normal = "正常"
+    case late = "迟到"
+    case leave = "请假"
+    case absent = "不参加讨论"
+    case earlyLeave = "早退"
+}
+
+/// 小组成员（打卡视角）。
+public struct GroupMember: Identifiable, Hashable, Sendable {
+    public let id: String
+    public let name: String
+    public let checkedIn: Bool
+    public let checkinTime: String?
+    public let status: CheckinStatus?
+
+    public init(id: String, name: String, checkedIn: Bool, checkinTime: String?, status: CheckinStatus?) {
+        self.id = id
+        self.name = name
+        self.checkedIn = checkedIn
+        self.checkinTime = checkinTime
+        self.status = status
+    }
+}
+
+/// 个人打卡历史条目。
+public struct PersonalCheckinRecord: Hashable, Sendable {
+    public let date: String
+    public let status: CheckinStatus
+    public let time: String
+
+    public init(date: String, status: CheckinStatus, time: String) {
+        self.date = date
+        self.status = status
+        self.time = time
+    }
+}
+
+/// 打卡页聚合数据。
+public struct CheckinRecord: Hashable, Sendable {
+    public let classDate: String
+    public let weekday: String
+    public let dayNum: Int
+    public let checked: Bool
+    public let status: CheckinStatus?
+    public let groupName: String
+    public let groupMembers: [GroupMember]
+    public let personalHistory: [PersonalCheckinRecord]
+
+    public init(
+        classDate: String,
+        weekday: String,
+        dayNum: Int,
+        checked: Bool,
+        status: CheckinStatus?,
+        groupName: String,
+        groupMembers: [GroupMember],
+        personalHistory: [PersonalCheckinRecord]
+    ) {
+        self.classDate = classDate
+        self.weekday = weekday
+        self.dayNum = dayNum
+        self.checked = checked
+        self.status = status
+        self.groupName = groupName
+        self.groupMembers = groupMembers
+        self.personalHistory = personalHistory
+    }
+}