feat: 版本管理，package.json 唯一版本源、/api/meta 返回版本、Dashboard Header 展示版本号

tests/web/components/App.test.tsx

@@ -69,7 +69,7 @@ function installMatchMedia(initialMatches: boolean) {
 void vi.mock("../../../src/web/hooks/use-queries", () => ({
   useDashboard: vi.fn(() => createDashboardResult()),
   useMeta: vi.fn(() => ({
-    data: { checkerTypes: ["http", "cmd"] },
+    data: { checkerTypes: ["http", "cmd"], version: "0.1.0" },
   })),
 }));
 
@@ -208,4 +208,25 @@ describe("App", () => {
     act(() => matchMediaController.setMatches(true));
     await waitFor(() => expect(document.documentElement.getAttribute("theme-mode")).toBe("dark"));
   });
+
+  test("Header 展示版本号", () => {
+    render(<App />);
+    expect(screen.getByText("v0.1.0")).not.toBeNull();
+  });
+
+  test("缺失版本时不展示版本占位", () => {
+    const { useMeta } = require("../../../src/web/hooks/use-queries");
+    useMeta.mockReturnValue({
+      data: { checkerTypes: ["http", "cmd"] },
+    });
+
+    render(<App />);
+    expect(screen.queryByText(/v\d+\.\d+\.\d+/)).toBeNull();
+  });
+
+  test("复用 useMeta 查询结果", () => {
+    const { useMeta } = require("../../../src/web/hooks/use-queries");
+    render(<App />);
+    expect(useMeta).toHaveBeenCalled();
+  });
 });