diff --git a/vehicle-data-platform/apps/web/src/v2/pages/HistoryPage.test.tsx b/vehicle-data-platform/apps/web/src/v2/pages/HistoryPage.test.tsx
index b3585a28..845f3166 100644
--- a/vehicle-data-platform/apps/web/src/v2/pages/HistoryPage.test.tsx
+++ b/vehicle-data-platform/apps/web/src/v2/pages/HistoryPage.test.tsx
@@ -158,8 +158,10 @@ test('clears stale rows, charts, and evidence as soon as the history scope chang
   expect(desktopHistoryRow).toHaveAttribute('aria-expanded', 'true');
   expect(await screen.findByText('OLDVIN-evidence')).toBeInTheDocument();
   expect(view.container.querySelector('.v2-history-evidence-descriptions.semi-descriptions')).toBeInTheDocument();
+  expect(view.container.querySelector('.v2-history-evidence-status')).toHaveTextContent('证据判读正常');
   expect(view.container.querySelector('.v2-evidence-values.semi-descriptions')).toBeInTheDocument();
   expect(view.container.querySelector('.v2-history-quality-tag.semi-tag')).toHaveTextContent('正常');
+  expect(view.container.querySelector('.v2-history-protocol-tag.semi-tag')).toHaveTextContent('JT808');
   expect(view.container.querySelector('.v2-history-workspace')).toHaveClass('is-inspector-open');
   fireEvent.click(screen.getByRole('button', { name: '关闭数据详情' }));
   expect(desktopHistoryRow).toHaveAttribute('aria-expanded', 'false');
@@ -170,6 +172,8 @@ test('clears stale rows, charts, and evidence as soon as the history scope chang
   await waitFor(() => expect(mocks.historySeries).toHaveBeenCalledTimes(1));
   expect(screen.getByRole('heading', { level: 5, name: '聚合趋势' })).toBeInTheDocument();
   expect(view.container.querySelector('.v2-history-trend')).toHaveClass('is-expanded');
+  expect((await screen.findByText('覆盖 100.0%')).closest('.semi-tag')).toBeInTheDocument();
+  expect((await screen.findByText('时间窗完整')).closest('.semi-tag')).toBeInTheDocument();
 
   fireEvent.change(screen.getByPlaceholderText('车牌 / VIN，多台用逗号分隔'), { target: { value: 'NEWVIN' } });
   fireEvent.click(screen.getByRole('button', { name: '查询' }));
@@ -206,6 +210,7 @@ test('renders only selectable Semi history cards on mobile', async () => {
   expect(action).toHaveAttribute('aria-expanded', 'false');
   expect(view.container.querySelector('.v2-history-table-scroll.is-mobile-scroll')).toHaveAttribute('aria-label', '历史明细列表，可上下滚动');
   expect(view.container.querySelector('.v2-history-table-scroll.is-mobile-scroll')).toHaveAttribute('tabindex', '0');
+  expect(action.closest('.v2-history-mobile-card')?.querySelector('.v2-history-protocol-tag.semi-tag')).toHaveTextContent('JT808');
   expect(view.container.querySelector('.v2-history-metric-scroll')).not.toBeInTheDocument();
   expect(view.container.querySelector('.v2-history-summary-rail')).toBeInTheDocument();
   expect(view.container.querySelector('.v2-history-result-actions')).toHaveClass('is-mobile-actions');
diff --git a/vehicle-data-platform/apps/web/src/v2/pages/HistoryPage.tsx b/vehicle-data-platform/apps/web/src/v2/pages/HistoryPage.tsx
index d07b609d..b2b1f4e9 100644
--- a/vehicle-data-platform/apps/web/src/v2/pages/HistoryPage.tsx
+++ b/vehicle-data-platform/apps/web/src/v2/pages/HistoryPage.tsx
@@ -44,6 +44,11 @@ function HistoryQualityTag({ quality }: { quality: string }) {
   return <Tag className="v2-history-quality-tag" color={color} type="light" size="small">{historyQualityLabel(quality)}</Tag>;
 }
 
+function HistoryProtocolTag({ protocol }: { protocol: string }) {
+  const color = protocol === 'GB32960' ? 'blue' : protocol === 'JT808' ? 'cyan' : protocol === 'YUTONG_MQTT' ? 'violet' : 'grey';
+  return <Tag className="v2-history-protocol-tag" color={color} type="light" size="small">{protocol || '未知来源'}</Tag>;
+}
+
 function HistoryTrend({ response, category, loading, error, hasMetrics, expanded, onToggle }: {
   response?: HistorySeriesResponse;
   category: string;
@@ -61,10 +66,14 @@ function HistoryTrend({ response, category, loading, error, hasMetrics, expanded
     : category === 'mileage'
       ? '日里程按自然日通过明细核对'
       : '按查询时间窗汇总连续指标';
+  const coverageColor = coverage >= 95 ? 'green' : coverage >= 70 ? 'orange' : 'red';
   const header = <WorkspacePanelHeader
     title="聚合趋势"
     description={description}
-    meta={summary ? `${formatSeriesGrain(summary.grainSeconds)}粒度 · 覆盖 ${coverage.toFixed(1)}% · ${summary.rawPointCount.toLocaleString('zh-CN')} 原始点` : undefined}
+    meta={summary ? <span className="v2-history-trend-meta">
+      <Tag color={coverageColor} type="light" size="small">覆盖 {coverage.toFixed(1)}%</Tag>
+      <span>{formatSeriesGrain(summary.grainSeconds)}粒度 · {summary.rawPointCount.toLocaleString('zh-CN')} 原始点</span>
+    </span> : undefined}
     actions={<Button
       className="v2-history-trend-toggle is-expanded"
       theme="borderless"
@@ -84,7 +93,12 @@ function HistoryTrend({ response, category, loading, error, hasMetrics, expanded
       <g className="v2-chart-axis"><text x="49" y="14">{panel.maximum.toLocaleString('zh-CN', { maximumFractionDigits: 2 })}</text><text x="49" y="100">{panel.minimum.toLocaleString('zh-CN', { maximumFractionDigits: 2 })}</text><text x="54" y="112">{formatAxisTime(panel.start)}</text><text x="786" y="112" textAnchor="end">{formatAxisTime(panel.end)}</text></g>
       {panel.lines.flatMap((line) => line.paths.map((path, index) => <path key={`${line.key}-${index}`} d={path} fill="none" stroke={line.color} strokeWidth="2" vectorEffect="non-scaling-stroke"><title>{line.label}</title></path>))}
     </svg><footer>{panel.lines.map((line) => <span key={line.key}><i style={{ background: line.color }} />{line.label}</span>)}</footer></article>)}</div> : <Empty className="v2-history-chart-empty" title="当前时间窗没有趋势点" description="没有可聚合的数值点，空窗不会被人工补值。" />}
-    {summary ? <small className="v2-history-trend-evidence">{summary.evidence} · 缺失 {summary.missingBucketCount.toLocaleString('zh-CN')} / {summary.expectedBucketCount.toLocaleString('zh-CN')} 桶 · 查询 {summary.queryDurationMs} ms</small> : null}
+    {summary ? <footer className="v2-history-trend-evidence">
+      <Tag color={summary.missingBucketCount ? 'orange' : 'green'} type="light" size="small">{summary.missingBucketCount ? '存在空窗' : '时间窗完整'}</Tag>
+      <span title={summary.evidence}>{summary.evidence}</span>
+      <strong>缺失 {summary.missingBucketCount.toLocaleString('zh-CN')} / {summary.expectedBucketCount.toLocaleString('zh-CN')} 桶</strong>
+      <span>查询 {summary.queryDurationMs} ms</span>
+    </footer> : null}
   </Card>;
 }
 
@@ -141,12 +155,22 @@ function ExportJobsPanel({ showHeader = true }: { showHeader?: boolean }) {
 
 function EvidencePanel({ row, metrics, onClose, showHeader = true }: { row?: HistoryDataRow; metrics: HistoryMetricDefinition[]; onClose: () => void; showHeader?: boolean }) {
   return <Card className="v2-history-evidence" bodyStyle={{ padding: 0 }}>{showHeader ? <WorkspacePanelHeader title="数据详情" description={row ? `${row.plate || '未绑定车牌'} · ${row.protocol}` : '选择明细后核对来源与质量'} actions={row ? <Button theme="borderless" type="tertiary" icon={<IconClose />} onClick={onClose} aria-label="关闭数据详情" /> : null} /> : null}
-    {row ? <><Descriptions className="v2-history-evidence-descriptions" align="left" size="small" data={[
+    {row ? <><div className={`v2-history-evidence-status${isHealthyHistoryQuality(row.quality) ? ' is-healthy' : ' is-attention'}`}>
+      <div>
+        <span>证据判读</span>
+        <strong>{historyQualityLabel(row.quality)}</strong>
+        <small>{row.qualityReason || '平台未返回质量说明'}</small>
+      </div>
+      <div>
+        <HistoryProtocolTag protocol={row.protocol} />
+        <PlatformTime className="v2-history-time" value={row.deviceTime} />
+      </div>
+    </div><Descriptions className="v2-history-evidence-descriptions" align="left" size="small" data={[
       { key: '车牌', value: row.plate || '—' },
       { key: 'VIN', value: row.vin },
       { key: '设备时间', value: <PlatformTime className="v2-history-time" value={row.deviceTime} /> },
       { key: '服务时间', value: <PlatformTime className="v2-history-time" value={row.serverTime} /> },
-      { key: '数据来源', value: <Tag color="blue" type="light" size="small">{row.protocol}</Tag> },
+      { key: '数据来源', value: <HistoryProtocolTag protocol={row.protocol} /> },
       { key: '数据质量', value: <HistoryQualityTag quality={row.quality} /> },
       { key: '质量原因', value: row.qualityReason || '平台未返回质量说明' }
     ]} />
@@ -202,7 +226,7 @@ function HistoryDataTable({ rows, metrics, selectedRowID, onSelect }: { rows: Hi
     { title: '车牌', dataIndex: 'plate', width: 110, fixed: 'left' as const, className: 'v2-history-plate-column', render: (value: string) => value || '—' },
     { title: '服务时间', dataIndex: 'serverTime', width: 150, render: (value: string) => <PlatformTime className="v2-history-time" value={value} /> },
     { title: 'VIN', dataIndex: 'vin', width: 160, render: (value: string) => <span className="v2-history-vin" title={value}>{value}</span> },
-    { title: '协议', dataIndex: 'protocol', width: 100 },
+    { title: '协议', dataIndex: 'protocol', width: 110, render: (value: string) => <HistoryProtocolTag protocol={value} /> },
     ...metrics.map((metric) => ({
       title: `${metric.label}${metric.unit ? ` (${metric.unit})` : ''}`,
       dataIndex: metric.key,
@@ -461,7 +485,7 @@ export default function HistoryPage() {
             onKeyDown={scrollHistoryTable}
           >
             {mobileLayout
-              ? <div className="v2-history-mobile-list">{resultRows.map((row) => <Card key={row.id} className={`v2-history-mobile-card${selectedRow?.id === row.id ? ' is-selected' : ''}`} bodyStyle={{ padding: 0 }}><Button theme="borderless" type="tertiary" className="v2-history-mobile-action" aria-pressed={selectedRow?.id === row.id} aria-expanded={selectedRow?.id === row.id} aria-label={`查看 ${row.plate || row.vin} ${row.deviceTime} 数据详情`} onClick={() => selectRow(row)}><span className="v2-history-mobile-card-content"><header><span><strong>{row.plate || '未绑定车牌'}</strong><small>{row.vin}</small></span><span className={`v2-quality is-${row.quality}`}><i />{historyQualityLabel(row.quality)}</span></header><p><PlatformTime className="v2-history-time" value={row.deviceTime} /><b>{row.protocol}</b></p>{isHealthyHistoryQuality(row.quality) ? null : <small className="v2-history-mobile-quality">{row.qualityReason || '平台未返回质量说明'}</small>}<dl>{visibleMetrics.slice(0, 4).map((metric) => <div key={metric.key}><dt>{metric.label}</dt><dd>{formatHistoryValue(row.values[metric.key], metric)}</dd></div>)}</dl><footer>查看完整详情<IconChevronRight /></footer></span></Button></Card>)}</div>
+              ? <div className="v2-history-mobile-list">{resultRows.map((row) => <Card key={row.id} className={`v2-history-mobile-card${selectedRow?.id === row.id ? ' is-selected' : ''}`} bodyStyle={{ padding: 0 }}><Button theme="borderless" type="tertiary" className="v2-history-mobile-action" aria-pressed={selectedRow?.id === row.id} aria-expanded={selectedRow?.id === row.id} aria-label={`查看 ${row.plate || row.vin} ${row.deviceTime} 数据详情`} onClick={() => selectRow(row)}><span className="v2-history-mobile-card-content"><header><span><strong>{row.plate || '未绑定车牌'}</strong><small>{row.vin}</small></span><span className={`v2-quality is-${row.quality}`}><i />{historyQualityLabel(row.quality)}</span></header><span className="v2-history-mobile-meta"><PlatformTime className="v2-history-time" value={row.deviceTime} /><HistoryProtocolTag protocol={row.protocol} /></span>{isHealthyHistoryQuality(row.quality) ? null : <small className="v2-history-mobile-quality">{row.qualityReason || '平台未返回质量说明'}</small>}<dl>{visibleMetrics.slice(0, 4).map((metric) => <div key={metric.key}><dt>{metric.label}</dt><dd>{formatHistoryValue(row.values[metric.key], metric)}</dd></div>)}</dl><footer>查看完整详情<IconChevronRight /></footer></span></Button></Card>)}</div>
               : <HistoryDataTable rows={resultRows} metrics={visibleMetrics} selectedRowID={selectedRow?.id} onSelect={selectRow} />}
             {dataQuery.isPending && keywords.length
               ? <PanelLoading className="v2-history-loading" title="正在加载当前筛选范围的历史数据" description="按车辆、时间和协议整理可追溯证据。" />
diff --git a/vehicle-data-platform/apps/web/src/v2/pages/UsersPage.test.tsx b/vehicle-data-platform/apps/web/src/v2/pages/UsersPage.test.tsx
index 9791934e..09dc6c3f 100644
--- a/vehicle-data-platform/apps/web/src/v2/pages/UsersPage.test.tsx
+++ b/vehicle-data-platform/apps/web/src/v2/pages/UsersPage.test.tsx
@@ -286,7 +286,7 @@ test('filters the customer directory by status and exposes the active result sco
     }
   ]);
   const client = new QueryClient({ defaultOptions: { queries: { retry: false } } });
-  render(<QueryClientProvider client={client}><UsersPage /></QueryClientProvider>);
+  const view = render(<QueryClientProvider client={client}><UsersPage /></QueryClientProvider>);
 
   expect(await screen.findByRole('button', { name: /选择客户 华东客户/ })).toBeInTheDocument();
   expect(screen.getByRole('button', { name: /选择客户 西部客户/ })).toBeInTheDocument();
@@ -309,6 +309,14 @@ test('filters the customer directory by status and exposes the active result sco
   await waitFor(() => expect(screen.getByRole('button', { name: /选择客户 华东客户/ })).toBeInTheDocument());
   expect(screen.getByRole('button', { name: /选择客户 西部客户/ })).toBeInTheDocument();
 
+  // Semi keeps the first Select popup mounted briefly while its close animation
+  // finishes. Remount before the second scope assertion so the test never clicks
+  // a stale portal when the full suite is under load.
+  view.unmount();
+  document.querySelectorAll('.semi-portal').forEach((portal) => portal.remove());
+  render(<QueryClientProvider client={client}><UsersPage /></QueryClientProvider>);
+  expect(await screen.findByRole('button', { name: /选择客户 华东客户/ })).toBeInTheDocument();
+
   fireEvent.click(screen.getByRole('combobox', { name: '访问状态' }));
   const attentionOption = await waitFor(() => {
     const options = [...document.querySelectorAll<HTMLElement>('.semi-select-option')]
diff --git a/vehicle-data-platform/apps/web/src/v2/styles/workspace.css b/vehicle-data-platform/apps/web/src/v2/styles/workspace.css
index 2ea17b86..d933899a 100644
--- a/vehicle-data-platform/apps/web/src/v2/styles/workspace.css
+++ b/vehicle-data-platform/apps/web/src/v2/styles/workspace.css
@@ -7358,7 +7358,8 @@
     font-size: 9px;
   }
 
-  .v2-history-mobile-card-content p {
+  .v2-history-mobile-card-content p,
+  .v2-history-mobile-meta {
     margin: 5px 0;
     font-size: 9px;
   }
@@ -14311,6 +14312,199 @@
   font-weight: 650;
 }
 
+/*
+ * Semi UI history evidence refinement.
+ * Protocol, coverage and quality are decision signals, so they use one shared
+ * tag language instead of competing with dense identifiers and raw numbers.
+ */
+.v2-history-protocol-tag.semi-tag {
+  min-height: 22px;
+  flex: 0 0 auto;
+  border-radius: 999px;
+  padding-inline: 8px;
+  font-size: 10px;
+  font-weight: 700;
+  letter-spacing: .01em;
+  white-space: nowrap;
+}
+
+.v2-history-trend-meta {
+  display: inline-flex;
+  min-width: 0;
+  align-items: center;
+  gap: 8px;
+}
+
+.v2-history-trend-meta > .semi-tag {
+  min-height: 22px;
+  flex: 0 0 auto;
+  border-radius: 999px;
+  padding-inline: 8px;
+  font-size: 10px;
+  font-weight: 720;
+}
+
+.v2-history-trend-meta > span {
+  overflow: hidden;
+  color: #75859a;
+  font-size: 10px;
+  font-variant-numeric: tabular-nums;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.v2-history-trend-panels article {
+  display: grid;
+  grid-template-rows: 28px minmax(0, 1fr) 23px;
+  border-color: #dfe7f0;
+  border-radius: 9px;
+  background: #fff;
+}
+
+.v2-history-trend-panels article > header {
+  height: auto;
+  padding-inline: 9px;
+  border-bottom: 1px solid #edf1f5;
+  background: #fbfcfe;
+}
+
+.v2-history-trend-panels article > header strong {
+  color: #33475f;
+  font-size: 11px;
+}
+
+.v2-history-trend-panels article > header span {
+  color: #8290a2;
+  font-size: 9px;
+  font-variant-numeric: tabular-nums;
+}
+
+.v2-history-trend-panels svg {
+  height: 100%;
+  min-height: 0;
+}
+
+.v2-history-trend-panels article > footer {
+  min-height: 23px;
+  border-top: 1px solid #f0f3f7;
+  padding-inline: 9px;
+  color: #65768b;
+  font-size: 9px;
+}
+
+.v2-history-trend-panels article > footer i {
+  width: 12px;
+  height: 3px;
+  border-radius: 999px;
+}
+
+.v2-chart-axis text {
+  fill: #6f7f93;
+  font-size: 9px;
+}
+
+.v2-history-trend-evidence {
+  display: flex;
+  min-height: 31px;
+  flex: 0 0 auto;
+  align-items: center;
+  gap: 8px;
+  overflow: hidden;
+  border-top: 1px solid #e8edf3;
+  padding: 4px 10px;
+  color: #748397;
+  font-size: 9px;
+  font-variant-numeric: tabular-nums;
+  white-space: nowrap;
+}
+
+.v2-history-trend-evidence > .semi-tag {
+  min-height: 21px;
+  flex: 0 0 auto;
+  border-radius: 999px;
+  padding-inline: 7px;
+  font-size: 9px;
+  font-weight: 700;
+}
+
+.v2-history-trend-evidence > span:first-of-type {
+  min-width: 0;
+  flex: 1 1 auto;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.v2-history-trend-evidence > strong {
+  flex: 0 0 auto;
+  color: #596b80;
+  font-size: inherit;
+  font-weight: 700;
+}
+
+.v2-history-evidence-status {
+  display: grid;
+  min-height: 80px;
+  grid-template-columns: minmax(0, 1fr) auto;
+  align-items: center;
+  gap: 12px;
+  border-bottom: 1px solid #dfe7f0;
+  padding: 11px 13px;
+  background: linear-gradient(135deg, #f7fafc 0%, #fff 100%);
+}
+
+.v2-history-evidence-status.is-healthy {
+  box-shadow: inset 3px 0 #18a86b;
+}
+
+.v2-history-evidence-status.is-attention {
+  box-shadow: inset 3px 0 #eda43a;
+}
+
+.v2-history-evidence-status > div {
+  display: flex;
+  min-width: 0;
+  flex-direction: column;
+  gap: 3px;
+}
+
+.v2-history-evidence-status > div:last-child {
+  align-items: flex-end;
+  gap: 7px;
+}
+
+.v2-history-evidence-status span {
+  color: #8290a2;
+  font-size: 10px;
+  font-weight: 650;
+}
+
+.v2-history-evidence-status strong {
+  color: #263b53;
+  font-size: 17px;
+  line-height: 1.2;
+}
+
+.v2-history-evidence-status small {
+  overflow: hidden;
+  color: #68798e;
+  font-size: 10px;
+  line-height: 1.45;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.v2-history-evidence-status .v2-history-time {
+  color: #66788e;
+  font-size: 10px;
+  font-weight: 650;
+}
+
+.v2-history-data-table .v2-history-protocol-tag.semi-tag {
+  min-height: 21px;
+  padding-inline: 7px;
+  font-size: 9px;
+}
+
 @media (max-width: 900px) and (min-width: 681px) {
   .v2-history-summary-rail > .semi-card-body {
     grid-template-columns: minmax(230px, .7fr) minmax(0, 1.6fr);
@@ -14351,6 +14545,71 @@
     font-weight: 650;
   }
 
+  .v2-history-mobile-meta {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    margin-block: 6px;
+  }
+
+  .v2-history-mobile-meta .v2-history-protocol-tag.semi-tag {
+    min-height: 20px;
+    padding-inline: 7px;
+    font-size: 9px;
+  }
+
+  .v2-history-mobile-card-content dt {
+    font-size: 9px;
+  }
+
+  .v2-history-mobile-card-content dd {
+    font-size: 11px;
+    font-weight: 700;
+  }
+
+  .v2-history-trend .v2-workspace-panel-meta {
+    display: flex;
+  }
+
+  .v2-history-trend-meta > span {
+    display: none;
+  }
+
+  .v2-history-trend-meta > .semi-tag {
+    min-height: 20px;
+    padding-inline: 7px;
+    font-size: 9px;
+  }
+
+  .v2-history-trend-panels {
+    padding: 7px;
+  }
+
+  .v2-history-trend-evidence {
+    min-height: 29px;
+    gap: 6px;
+    padding-inline: 8px;
+  }
+
+  .v2-history-trend-evidence > span:first-of-type,
+  .v2-history-trend-evidence > span:last-child {
+    display: none;
+  }
+
+  .v2-history-evidence-status {
+    min-height: 74px;
+    gap: 8px;
+    padding: 9px 11px;
+  }
+
+  .v2-history-evidence-status strong {
+    font-size: 16px;
+  }
+
+  .v2-history-evidence-status small {
+    max-width: 205px;
+  }
+
   .v2-history-summary-rail.semi-card {
     min-height: 132px;
     overflow: visible;