feat: 接入消息未读数、全部已读与首页红点角标同步。

固定消息中心为首页入口，并在推送到达、已读后刷新桌面角标。

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

suixinkanTests/MessageCenterViewModelTests.swift

@@ -32,17 +32,77 @@ final class MessageCenterViewModelTests: XCTestCase {
     func testUnreadSelectionMarksReadAndOpensDetail() async {
         let api = MockMessageCenterAPI()
         api.listResponses = [MessageListResponse(hasMore: false, lastId: 0, items: [makeMessage(id: 3, isRead: false)])]
+        api.readResponse = MessageUnreadCountResponse(unreadCount: 4)
         let viewModel = MessageCenterViewModel()
         var opened: MessageItem?
+        var callbackCount: Int?
         viewModel.onOpenDetail = { opened = $0 }
+        viewModel.onUnreadMessageCountChange = { callbackCount = $0 }
+        let unreadChanged = expectation(
+            forNotification: NotificationName.unreadMessageCountDidChange,
+            object: nil,
+            handler: { notification in
+                notification.userInfo?[NotificationUserInfoKey.unreadCount] as? Int == 4
+            }
+        )
 
         await viewModel.loadInitial(api: api)
         await viewModel.selectMessage(id: 3, api: api)
+        await fulfillment(of: [unreadChanged], timeout: 1)
 
         XCTAssertEqual(api.readCalls, [3])
         XCTAssertEqual(opened?.id, 3)
         XCTAssertEqual(opened?.isRead, true)
         XCTAssertEqual(viewModel.items.first?.isRead, true)
+        XCTAssertEqual(callbackCount, 4)
+    }
+
+    func testMarkAllAsReadUpdatesItemsAndPublishesLatestCount() async {
+        let api = MockMessageCenterAPI()
+        api.listResponses = [MessageListResponse(items: [
+            makeMessage(id: 1, isRead: false),
+            makeMessage(id: 2, isRead: true),
+        ])]
+        api.readAllResponse = MessageReadAllResponse(updatedCount: 1, unreadCount: 0)
+        let viewModel = MessageCenterViewModel()
+        var callbackCount: Int?
+        var message: String?
+        viewModel.onUnreadMessageCountChange = { callbackCount = $0 }
+        viewModel.onShowMessage = { message = $0 }
+        let unreadChanged = expectation(
+            forNotification: NotificationName.unreadMessageCountDidChange,
+            object: nil,
+            handler: { notification in
+                notification.userInfo?[NotificationUserInfoKey.unreadCount] as? Int == 0
+            }
+        )
+
+        await viewModel.loadInitial(api: api)
+        let response = await viewModel.markAllAsRead(api: api)
+        await fulfillment(of: [unreadChanged], timeout: 1)
+
+        XCTAssertEqual(api.readAllCallCount, 1)
+        XCTAssertEqual(response, MessageReadAllResponse(updatedCount: 1, unreadCount: 0))
+        XCTAssertTrue(viewModel.items.allSatisfy(\.isRead))
+        XCTAssertEqual(callbackCount, 0)
+        XCTAssertEqual(message, "已全部标记为已读")
+    }
+
+    func testMarkAllAsReadFailureKeepsUnreadState() async {
+        let api = MockMessageCenterAPI()
+        api.listResponses = [MessageListResponse(items: [makeMessage(id: 6, isRead: false)])]
+        api.readAllError = TestError(message: "fail")
+        let viewModel = MessageCenterViewModel()
+        var message: String?
+        viewModel.onShowMessage = { message = $0 }
+
+        await viewModel.loadInitial(api: api)
+        let response = await viewModel.markAllAsRead(api: api)
+
+        XCTAssertNil(response)
+        XCTAssertEqual(api.readAllCallCount, 1)
+        XCTAssertEqual(viewModel.items.first?.isRead, false)
+        XCTAssertEqual(message, "全部标记已读失败，请稍后重试")
     }
 
     func testReadSelectionOpensDetailWithoutCallingReadAPI() async {
@@ -125,8 +185,12 @@ private final class MockMessageCenterAPI: MessageCenterServing {
     var listResponses: [MessageListResponse] = []
     var listCalls: [(lastId: Int, limit: Int, unread: Int)] = []
     var readCalls: [Int] = []
+    var readResponse = MessageUnreadCountResponse()
+    var readAllResponse = MessageReadAllResponse()
+    var readAllCallCount = 0
     var deleteCalls: [Int] = []
     var readError: Error?
+    var readAllError: Error?
     var deleteError: Error?
 
     func list(lastId: Int, limit: Int, unread: Int) async throws -> MessageListResponse {
@@ -135,9 +199,20 @@ private final class MockMessageCenterAPI: MessageCenterServing {
         return listResponses.removeFirst()
     }
 
-    func markAsRead(messageId: Int) async throws {
+    func unreadCount() async throws -> MessageUnreadCountResponse {
+        MessageUnreadCountResponse()
+    }
+
+    func markAsRead(messageId: Int) async throws -> MessageUnreadCountResponse {
         readCalls.append(messageId)
         if let readError { throw readError }
+        return readResponse
+    }
+
+    func markAllAsRead() async throws -> MessageReadAllResponse {
+        readAllCallCount += 1
+        if let readAllError { throw readAllError }
+        return readAllResponse
     }
 
     func delete(messageId: Int) async throws {