feat: 新增 Fake 仓库实现（含可提交的打卡/计划与会话）

IosClientKit/Sources/CoreRepository/FakeProfileRepository.swift

@@ -0,0 +1,40 @@
+import CoreCommon
+import CoreDomain
+import CoreModel
+
+/// Fake 个人资料仓库（骨架阶段返回假数据）。
+public struct FakeProfileRepository: ProfileRepository {
+    public init() {}
+
+    public func observeProfile() -> AsyncThrowingStream<UserProfile, Error> {
+        AsyncThrowingStream { continuation in
+            let task = Task {
+                do {
+                    try await Task.sleep(for: .milliseconds(400))
+                    try Task.checkCancellation()
+                    Logger.info("FakeProfileRepository 返回假数据")
+                    continuation.yield(Self.fakeData)
+                    continuation.finish()
+                } catch {
+                    continuation.finish(throwing: error)
+                }
+            }
+            continuation.onTermination = { _ in task.cancel() }
+        }
+    }
+
+    private static let fakeData = UserProfile(
+        displayName: "张三",
+        name: "张三",
+        studentId: "20260001",
+        phone: "138****1234",
+        role: "成员",
+        group: "进阶一组",
+        loginType: "手机号",
+        avatarUrl: nil,
+        classGroups: [
+            ClassGroup(period: "2026 秋季", group: "进阶一组", role: "成员"),
+            ClassGroup(period: "2026 春季", group: "进阶二组", role: "组长"),
+        ]
+    )
+}