Add custom main tab bar with global scan-to-verify flow.

Introduce configurable custom TabBar with order badge, central scanner routing to verification orders, and update the migration checklist for recently completed modules.

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

suixinkanTests/MainTabBadgeViewModelTests.swift

@@ -0,0 +1,106 @@
+//
+//  MainTabBadgeViewModelTests.swift
+//  suixinkanTests
+//
+//  Created by Codex on 2026/6/23.
+//
+
+import XCTest
+@testable import suixinkan
+
+@MainActor
+/// 主 Tab 角标测试，覆盖待核销数量加载、封顶和失败清理。
+final class MainTabBadgeViewModelTests: XCTestCase {
+    /// 测试无景区时清空角标且不请求接口。
+    func testMissingScenicClearsBadgeWithoutRequestingAPI() async {
+        let api = MockMainTabOrderService()
+        let viewModel = MainTabBadgeViewModel()
+
+        await viewModel.refreshPendingWriteOffCount(api: api, scenicId: nil, storeId: 66)
+
+        XCTAssertNil(viewModel.pendingWriteOffCount)
+        XCTAssertTrue(api.writeOffListCalls.isEmpty)
+    }
+
+    /// 测试接口成功时展示待核销总数。
+    func testSuccessfulRefreshStoresPendingWriteOffCount() async {
+        let api = MockMainTabOrderService()
+        api.writeOffResponse = ListPayload<WriteOffOrderItem>(total: 8, list: [])
+        let viewModel = MainTabBadgeViewModel()
+
+        await viewModel.refreshPendingWriteOffCount(api: api, scenicId: 88, storeId: 66)
+
+        XCTAssertEqual(viewModel.pendingWriteOffCount, 8)
+        XCTAssertEqual(api.writeOffListCalls, [.init(scenicId: 88, storeId: 66, page: 1, pageSize: 1)])
+    }
+
+    /// 测试待核销数量超过 99 时角标封顶。
+    func testSuccessfulRefreshCapsPendingWriteOffCountAtNinetyNine() async {
+        let api = MockMainTabOrderService()
+        api.writeOffResponse = ListPayload<WriteOffOrderItem>(total: 120, list: [])
+        let viewModel = MainTabBadgeViewModel()
+
+        await viewModel.refreshPendingWriteOffCount(api: api, scenicId: 88, storeId: nil)
+
+        XCTAssertEqual(viewModel.pendingWriteOffCount, 99)
+    }
+
+    /// 测试接口失败时清空角标。
+    func testRefreshFailureClearsBadge() async {
+        let api = MockMainTabOrderService()
+        api.writeOffError = APIError.httpStatus(500, "server error")
+        let viewModel = MainTabBadgeViewModel()
+
+        await viewModel.refreshPendingWriteOffCount(api: api, scenicId: 88, storeId: 66)
+
+        XCTAssertNil(viewModel.pendingWriteOffCount)
+        XCTAssertEqual(api.writeOffListCalls.count, 1)
+    }
+}
+
+@MainActor
+/// 主 Tab 角标测试用订单服务，只实现角标依赖的核销列表记录。
+private final class MockMainTabOrderService: OrderServing {
+    struct WriteOffListCall: Equatable {
+        let scenicId: Int
+        let storeId: Int?
+        let page: Int
+        let pageSize: Int
+    }
+
+    var writeOffResponse = ListPayload<WriteOffOrderItem>(total: 0, list: [])
+    var writeOffError: Error?
+    private(set) var writeOffListCalls: [WriteOffListCall] = []
+
+    /// 返回空订单管理列表，角标测试不会使用该方法。
+    func orderList(
+        scenicId: Int,
+        page: Int,
+        pageSize: Int,
+        orderStatus: Int?,
+        userPhone: String?,
+        startTime: String?,
+        endTime: String?,
+        isRefined: Int?,
+        isScenicAdmin: Bool
+    ) async throws -> ListPayload<OrderEntity> {
+        ListPayload(total: 0, list: [])
+    }
+
+    /// 记录核销列表请求并返回预设响应。
+    func writeOffList(scenicId: Int, storeId: Int?, page: Int, pageSize: Int) async throws -> ListPayload<WriteOffOrderItem> {
+        writeOffListCalls.append(.init(scenicId: scenicId, storeId: storeId, page: page, pageSize: pageSize))
+        if let writeOffError {
+            throw writeOffError
+        }
+        return writeOffResponse
+    }
+
+    /// 角标测试不会触发核销操作。
+    func writeOff(orderNumber: String) async throws {}
+
+    /// 角标测试不会请求订单详情。
+    func storeOrderDetail(storeId: Int, orderNumber: String) async throws -> StoreOrderDetailResponse {
+        try TestFixture.payload(StoreOrderDetailResponse.self, named: "store_order_detail_success")
+    }
+}