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/AllFunctionsViewModelTests.swift

@@ -29,7 +29,7 @@ final class AllFunctionsViewModelTests: XCTestCase {
         super.tearDown()
     }
 
-    func testLoadFunctionsUsesDefaultFirstFourWhenNoSavedURIs() {
+    func testLoadFunctionsUsesDefaultFirstFourAndExcludesMessageCenter() {
         appStore.permissions.savePermissionItems([
             HomePermissionItem(id: "1", name: "钱包", uri: "wallet"),
             HomePermissionItem(id: "2", name: "云盘", uri: "cloud_management"),
@@ -44,7 +44,7 @@ final class AllFunctionsViewModelTests: XCTestCase {
         XCTAssertEqual(viewModel.commonMenus.map(\.uri), [
             "wallet", "cloud_management", "task_management", "system_settings",
         ])
-        XCTAssertEqual(viewModel.moreMenus.map(\.uri), ["message_center"])
+        XCTAssertTrue(viewModel.moreMenus.isEmpty)
         XCTAssertEqual(
             menuStore.savedCommonURIs(
                 accountScope: appStore.session.accountCachePrefix,