feat: 打卡页对齐 android

IosClientKit/Sources/FeatureCheckin/CheckinViewModel.swift

@@ -0,0 +1,68 @@
+import CoreDomain
+import CoreModel
+import Observation
+
+@MainActor
+@Observable
+public final class CheckinViewModel {
+    public private(set) var uiState: CheckinUiState = .loading
+    public var selectedStatus: CheckinStatus = .normal
+    public var submitting = false
+
+    private let checkinUseCase: CheckinUseCase
+    private let sessionUseCase: SessionUseCase
+    private var loadTask: Task<Void, Never>?
+    private var dataTask: Task<Void, Never>?
+
+    public init(checkinUseCase: CheckinUseCase, sessionUseCase: SessionUseCase) {
+        self.checkinUseCase = checkinUseCase
+        self.sessionUseCase = sessionUseCase
+    }
+
+    public func load() {
+        loadTask?.cancel()
+        loadTask = Task { [weak self] in
+            guard let self else { return }
+            do {
+                for try await isLoggedIn in self.sessionUseCase.observeIsLoggedIn() {
+                    self.handleLoginState(isLoggedIn)
+                }
+            } catch is CancellationError {
+            } catch {
+                self.uiState = .error(error.localizedDescription)
+            }
+        }
+    }
+
+    /// 提交打卡（对齐 android：只即时高亮选中 pill，卡片/成员靠流重新发射刷新）。
+    public func submit(_ status: CheckinStatus) {
+        guard !submitting else { return }
+        selectedStatus = status
+        submitting = true
+        Task { [weak self] in
+            guard let self else { return }
+            try? await self.checkinUseCase.submitCheckin(status: status)
+            self.submitting = false
+        }
+    }
+
+    private func handleLoginState(_ isLoggedIn: Bool) {
+        dataTask?.cancel()
+        guard isLoggedIn else {
+            uiState = .loggedOut
+            return
+        }
+        uiState = .loading
+        dataTask = Task { [weak self] in
+            guard let self else { return }
+            do {
+                for try await record in self.checkinUseCase.observeCheckin() {
+                    self.uiState = .success(record)
+                }
+            } catch is CancellationError {
+            } catch {
+                self.uiState = .error(error.localizedDescription)
+            }
+        }
+    }
+}