feat(platform): show active realtime filters

vehicle-data-platform/apps/web/src/test/App.test.tsx

@@ -3196,6 +3196,45 @@ test('loads realtime vehicles from shareable source filter hash', async () => {
   expect(fetchMock).toHaveBeenCalledWith(expect.stringContaining('/api/realtime/vehicles?limit=50&offset=0&keyword=%E7%B2%A4ART002&protocol=JT808&online=online&serviceStatus=degraded'), undefined);
 });
 
+test('shows and clears current realtime service filters', async () => {
+  window.history.replaceState(null, '', '/#/realtime?keyword=%E7%B2%A4ART002&protocol=JT808&online=online&serviceStatus=degraded');
+  const fetchMock = vi.spyOn(globalThis, 'fetch').mockImplementation(async (input) => {
+    const path = String(input);
+    if (path.includes('/api/realtime/vehicles')) {
+      return {
+        ok: true,
+        json: async () => ({
+          data: { items: [], total: 1, limit: 50, offset: 0 },
+          traceId: 'trace-test',
+          timestamp: 1783094400000
+        })
+      } as Response;
+    }
+    return {
+      ok: true,
+      json: async () => ({
+        data: { items: [], total: 0, limit: 10, offset: 0 },
+        traceId: 'trace-test',
+        timestamp: 1783094400000
+      })
+    } as Response;
+  });
+
+  render(<App />);
+
+  expect(await screen.findByText('当前实时筛选')).toBeInTheDocument();
+  expect(screen.getByText('关键词：粤ART002')).toBeInTheDocument();
+  expect(screen.getByText('数据来源：JT808')).toBeInTheDocument();
+  expect(screen.getByText('在线：在线')).toBeInTheDocument();
+  expect(screen.getByText('服务状态：来源不完整')).toBeInTheDocument();
+  fireEvent.click(screen.getByRole('button', { name: '清空筛选' }));
+
+  await waitFor(() => {
+    expect(fetchMock).toHaveBeenCalledWith(expect.stringContaining('/api/realtime/vehicles?limit=50&offset=0'), undefined);
+  });
+  expect(window.location.hash).toBe('#/realtime');
+});
+
 test('updates realtime hash when source filters are submitted', async () => {
   window.history.replaceState(null, '', '/#/realtime');
   const fetchMock = vi.spyOn(globalThis, 'fetch').mockImplementation(async (input) => {