feat(platform): frame sources as evidence layer

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

@@ -715,6 +715,8 @@ test('dashboard prioritizes customer vehicle service command over data sources',
   expect(screen.getByRole('button', { name: '车辆地图态势 回放轨迹' })).toBeInTheDocument();
   expect(screen.getByText('车辆地图态势').compareDocumentPosition(screen.getByText('客户车辆服务总控台')) & Node.DOCUMENT_POSITION_FOLLOWING).toBeTruthy();
   expect(await screen.findByText('客户车辆服务总控台')).toBeInTheDocument();
+  expect(screen.getByText('来源证据收敛层')).toBeInTheDocument();
+  expect(screen.getByText('协议来源只用于证明车辆服务可信度，客户主流程仍然从车辆、地图、时间窗、统计、导出和告警进入。')).toBeInTheDocument();
   expect(screen.getByText('三个接入来源统一沉到证据层，首页只回答客户怎么监控车辆、回放轨迹、核对里程、导出数据和处理告警。')).toBeInTheDocument();
   expect(screen.getByRole('button', { name: '客户车辆服务总控台 实时地图 208 在线 进入地图' })).toBeInTheDocument();
   expect(screen.getByRole('button', { name: '客户车辆服务总控台 轨迹回放 4 活跃 回放轨迹' })).toBeInTheDocument();