fix: support safe project deletion

web/src/pages/AdminPage.test.tsx

@@ -1,7 +1,9 @@
 import { fireEvent, render, screen, waitFor } from "@testing-library/react";
-import { describe, expect, it, vi } from "vitest";
+import { beforeEach, describe, expect, it, vi } from "vitest";
 import { MemoryRouter } from "react-router-dom";
-import { api } from "../api";
+import { ApiError, api } from "../api";
+
+const { refreshMock } = vi.hoisted(() => ({ refreshMock: vi.fn() }));
 
 vi.mock("../components/AppShell", () => ({ AppShell: ({ children }: { children: React.ReactNode }) => <div>{children}</div> }));
 vi.mock("../hooks/usePollingResource", () => ({
@@ -71,12 +73,16 @@ vi.mock("../hooks/usePollingResource", () => ({
     error: null,
     offline: false,
     lastClientSuccessAt: new Date().toISOString(),
-    refresh: vi.fn(),
+    refresh: refreshMock,
   }),
 }));
 
 import { AdminPage } from "./AdminPage";
 
+beforeEach(() => {
+  refreshMock.mockReset();
+});
+
 describe("AdminPage active tickets", () => {
   it("保留核心排队数据并删除辅助概览模块", () => {
     render(<MemoryRouter initialEntries={["/admin"]}><AdminPage /></MemoryRouter>);
@@ -145,6 +151,46 @@ describe("AdminPage active tickets", () => {
     expect(screen.queryByRole("combobox", { name: "预计等待时间方式" })).not.toBeInTheDocument();
     expect(screen.getByRole("textbox", { name: "游客官方提示" })).toHaveValue("请在入口附近等候。");
     expect(screen.getByRole("button", { name: "保存项目" })).toBeVisible();
+    expect(screen.getByRole("button", { name: "删除项目" })).toBeVisible();
+  });
+
+  it("确认后删除项目，刷新数据并返回列表", async () => {
+    let resolveDelete!: () => void;
+    const deleteProject = vi.spyOn(api, "deleteProject").mockImplementation(() => new Promise<void>((resolve) => { resolveDelete = resolve; }));
+    refreshMock.mockResolvedValueOnce(undefined);
+    try {
+      render(<MemoryRouter initialEntries={["/admin/projects/project-1"]}><AdminPage /></MemoryRouter>);
+
+      fireEvent.click(screen.getByRole("button", { name: "删除项目" }));
+      expect(deleteProject).not.toHaveBeenCalled();
+      fireEvent.click(screen.getByRole("button", { name: "确认删除" }));
+
+      await waitFor(() => expect(deleteProject).toHaveBeenCalledWith("project-1"));
+      const deletingButton = screen.getByRole("button", { name: "正在删除" });
+      expect(deletingButton).toBeDisabled();
+      fireEvent.click(deletingButton);
+      expect(deleteProject).toHaveBeenCalledTimes(1);
+      resolveDelete();
+      await waitFor(() => expect(refreshMock).toHaveBeenCalled());
+      await waitFor(() => expect(screen.getByRole("heading", { name: "项目管理" })).toBeVisible());
+    } finally {
+      vi.restoreAllMocks();
+    }
+  });
+
+  it("删除项目失败时留在维护页并显示服务端消息", async () => {
+    const deleteProject = vi.spyOn(api, "deleteProject").mockRejectedValue(new ApiError("项目存在活动排队，无法删除", 409));
+    try {
+      render(<MemoryRouter initialEntries={["/admin/projects/project-1"]}><AdminPage /></MemoryRouter>);
+
+      fireEvent.click(screen.getByRole("button", { name: "删除项目" }));
+      fireEvent.click(screen.getByRole("button", { name: "确认删除" }));
+
+      expect(await screen.findByText("项目存在活动排队，无法删除")).toBeVisible();
+      expect(screen.getByRole("heading", { name: "东门观光车" })).toBeVisible();
+    } finally {
+      vi.restoreAllMocks();
+    }
   });
 
   it("创建项目与维护项目使用相同字段", () => {