新增任务模块，并接入首页任务管理路由

实现任务列表、详情与创建页面，对接 API，支持云端/本地附件，并添加单元测试。

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

suixinkan/App/RootView.swift

@@ -28,6 +28,7 @@ struct RootView: View {
     @State private var paymentAPI: PaymentAPI
     @State private var walletAPI: WalletAPI
     @State private var scenicPermissionAPI: ScenicPermissionAPI
+    @State private var taskAPI: TaskAPI
     @State private var authSessionCoordinator: AuthSessionCoordinator
     @State private var sessionBootstrapper: SessionBootstrapper
 
@@ -49,6 +50,7 @@ struct RootView: View {
         _paymentAPI = State(initialValue: PaymentAPI(client: apiClient))
         _walletAPI = State(initialValue: WalletAPI(client: apiClient))
         _scenicPermissionAPI = State(initialValue: ScenicPermissionAPI(client: apiClient))
+        _taskAPI = State(initialValue: TaskAPI(client: apiClient))
         _authSessionCoordinator = State(
             initialValue: AuthSessionCoordinator(
                 tokenStore: tokenStore,
@@ -87,6 +89,7 @@ struct RootView: View {
             .environment(paymentAPI)
             .environment(walletAPI)
             .environment(scenicPermissionAPI)
+            .environment(taskAPI)
             .environment(authSessionCoordinator)
             .task {
                 apiClient.bindAuthTokenProvider { appSession.token }