diff --git a/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-carbon-1440x900.png b/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-carbon-1440x900.png
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diff --git a/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-cinder-1440x900.png b/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-cinder-1440x900.png
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diff --git a/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-coolvibe-1440x900.png b/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-coolvibe-1440x900.png
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diff --git a/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-dawn-1440x900.png b/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-dawn-1440x900.png
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diff --git a/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-editorial-1440x900.png b/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-editorial-1440x900.png
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diff --git a/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-gilded-1440x900.png b/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-gilded-1440x900.png
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diff --git a/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-ink-1440x900.png b/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-ink-1440x900.png
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diff --git a/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-nocturne-1440x900.png b/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-nocturne-1440x900.png
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diff --git a/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-sage-1440x900.png b/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-sage-1440x900.png
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diff --git a/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-washi-1440x900.png b/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-washi-1440x900.png
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diff --git a/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-wasteland-1440x900.png b/.planning/usage-statistics-reference-refit/screenshots/dashboard-theme-wasteland-1440x900.png
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diff --git a/.planning/usage-statistics-reference-refit/screenshots/dashboard-washi-1024x768.png b/.planning/usage-statistics-reference-refit/screenshots/dashboard-washi-1024x768.png
index 1be5031..20ec551 100644
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diff --git a/.planning/usage-statistics-reference-refit/screenshots/dashboard-washi-1467x943.png b/.planning/usage-statistics-reference-refit/screenshots/dashboard-washi-1467x943.png
index 0f1b388..ce4f683 100644
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diff --git a/.planning/usage-statistics-reference-refit/screenshots/dashboard-washi-detail-1467x943.png b/.planning/usage-statistics-reference-refit/screenshots/dashboard-washi-detail-1467x943.png
index 211afb3..7bdc0f7 100644
Binary files a/.planning/usage-statistics-reference-refit/screenshots/dashboard-washi-detail-1467x943.png and b/.planning/usage-statistics-reference-refit/screenshots/dashboard-washi-detail-1467x943.png differ
diff --git a/.planning/usage-statistics-reference-refit/visual-check.js b/.planning/usage-statistics-reference-refit/visual-check.js
index 3fbb2ce..e8d9187 100644
--- a/.planning/usage-statistics-reference-refit/visual-check.js
+++ b/.planning/usage-statistics-reference-refit/visual-check.js
@@ -411,6 +411,29 @@ async function main() {
     await waitFor(() => evaluate(cdp, "!document.querySelector('#usage-dashboard-panel').hidden"), 10000);
     await waitFor(() => evaluate(cdp, "document.querySelector('#usage-dashboard-panel').dataset.state !== 'loading'"), 30000);
     await sleep(320);
+    const loadingLayout = await evaluate(cdp, `(() => {
+      const metricGrid = document.querySelector('.usage-dashboard__metric-grid');
+      const beforeTop = metricGrid.getBoundingClientRect().top;
+      document.querySelector('#usage-dashboard-refresh').click();
+      const afterTop = metricGrid.getBoundingClientRect().top;
+      return {
+        state: document.querySelector('#usage-dashboard-panel').dataset.state,
+        label: document.querySelector('#usage-dashboard-refresh-label').textContent,
+        busy: document.querySelector('#usage-dashboard-refresh').getAttribute('aria-busy'),
+        contentShift: Math.round(Math.abs(afterTop - beforeTop) * 10) / 10,
+        standaloneLoading: !!document.querySelector('#usage-dashboard-loading'),
+      };
+    })()`);
+    if (loadingLayout.state !== 'loading'
+      || loadingLayout.label !== '整理中'
+      || loadingLayout.busy !== 'true'
+      || loadingLayout.contentShift > 0.5
+      || loadingLayout.standaloneLoading) {
+      throw new Error(`加载状态仍引发布局变化：${JSON.stringify(loadingLayout)}`);
+    }
+    await waitFor(() => evaluate(cdp, `document.querySelector('#usage-dashboard-panel').dataset.state !== 'loading'
+      && document.querySelector('#usage-dashboard-refresh-label').textContent === '刷新'`), 30000);
+    await sleep(300);
     await evaluate(cdp, `(() => {
       const from = document.querySelector('#usage-dashboard-from');
       const to = document.querySelector('#usage-dashboard-to');
diff --git a/.planning/usage-statistics-reference-refit/visual-report.json b/.planning/usage-statistics-reference-refit/visual-report.json
index a1d9bc9..18af8de 100644
--- a/.planning/usage-statistics-reference-refit/visual-report.json
+++ b/.planning/usage-statistics-reference-refit/visual-report.json
@@ -1,5 +1,5 @@
 {
-  "generatedAt": "2026-08-03T14:15:13.710Z",
+  "generatedAt": "2026-08-05T01:06:45.134Z",
   "chrome": "/home/hdzx/.cache/ms-playwright/chromium-1228/chrome-linux64/chrome",
   "views": [
     {
diff --git a/dist-exe/cc-web-bun-linux-x64-baseline.tar.gz b/dist-exe/cc-web-bun-linux-x64-baseline.tar.gz
index fb2177b..b487988 100644
Binary files a/dist-exe/cc-web-bun-linux-x64-baseline.tar.gz and b/dist-exe/cc-web-bun-linux-x64-baseline.tar.gz differ
diff --git a/lib/session-search-index.js b/lib/session-search-index.js
index aecadec..8cfc165 100644
--- a/lib/session-search-index.js
+++ b/lib/session-search-index.js
@@ -322,6 +322,17 @@ function updatedTime(doc) {
   return Number.isFinite(time) ? time : 0;
 }
 
+// “最新”按本次命中的消息时间排序；没有消息时间时才回退到会话更新时间。
+function resultTime(result) {
+  const matchTimes = (result?.matches || [])
+    .map((match) => new Date(match?.timestamp || 0).getTime())
+    .filter((time) => Number.isFinite(time) && time > 0);
+  if (matchTimes.length > 0) return Math.max(...matchTimes);
+  const directTime = new Date(result?.timestamp || 0).getTime();
+  if (Number.isFinite(directTime) && directTime > 0) return directTime;
+  return updatedTime(result);
+}
+
 function buildQuery(rawQuery, options) {
   const maxQueryChars = clampInteger(
     options.maxQueryChars,
@@ -735,6 +746,8 @@ function createSessionSearchIndex(options = {}) {
       messageIndex: firstMatch ? firstMatch.messageIndex : null,
       role: firstMatch ? firstMatch.role : null,
       timestamp: firstMatch ? firstMatch.timestamp : null,
+      matchTimestamp: firstMatch ? firstMatch.timestamp : null,
+      sessionUpdated: doc.updated,
       title: doc.title,
       projectName: doc.projectName,
       updated: doc.updated,
@@ -773,8 +786,8 @@ function createSessionSearchIndex(options = {}) {
     }
 
     results.sort((a, b) => {
-      if (sort === 'newest') return updatedTime(b) - updatedTime(a) || b.score - a.score || a.sessionId.localeCompare(b.sessionId);
-      return b.score - a.score || updatedTime(b) - updatedTime(a) || a.sessionId.localeCompare(b.sessionId);
+      if (sort === 'newest') return resultTime(b) - resultTime(a) || b.score - a.score || a.sessionId.localeCompare(b.sessionId);
+      return b.score - a.score || resultTime(b) - resultTime(a) || a.sessionId.localeCompare(b.sessionId);
     });
 
     return {
diff --git a/public/app.js b/public/app.js
index b566c54..8e8d570 100644
--- a/public/app.js
+++ b/public/app.js
@@ -349,13 +349,13 @@
   const usageDashboardStatus = $('#usage-dashboard-status');
   const usageDashboardGeneratedAt = $('#usage-dashboard-generated-at');
   const usageDashboardRefresh = $('#usage-dashboard-refresh');
+  const usageDashboardRefreshLabel = $('#usage-dashboard-refresh-label');
   const usageDashboardPeriodWeek = $('#usage-dashboard-period-week');
   const usageDashboardPeriodMonth = $('#usage-dashboard-period-month');
   const usageDashboardPeriodCustom = $('#usage-dashboard-period-custom');
   const usageDashboardFrom = $('#usage-dashboard-from');
   const usageDashboardTo = $('#usage-dashboard-to');
   const usageDashboardApply = $('#usage-dashboard-apply');
-  const usageDashboardLoading = $('#usage-dashboard-loading');
   const usageDashboardError = $('#usage-dashboard-error');
   const usageDashboardTrend = $('#usage-dashboard-trend');
   const usageDashboardMcpStatus = $('#usage-dashboard-mcp-status');
@@ -4142,7 +4142,8 @@
           title: result?.title || match?.title || '未命名会话',
           projectName: result?.projectName || match?.projectName || '',
           cwd: result?.cwd || match?.cwd || '',
-          updated: match?.timestamp || result?.updated || null,
+          updated: match?.timestamp || result?.matchTimestamp || result?.updated || null,
+          sessionUpdated: result?.sessionUpdated || result?.updated || null,
           snippet: match?.snippet || result?.snippet || '',
           messageIndex: Number.isFinite(Number(match?.messageIndex)) ? Number(match.messageIndex) : null,
         });
@@ -4459,19 +4460,23 @@
   }
 
   function setUsageDashboardState(state, message = '') {
-    usageDashboardState.loading = state === 'loading';
+    const loading = state === 'loading';
+    usageDashboardState.loading = loading;
     usageDashboardState.error = state === 'error' ? String(message || '统计查询失败') : '';
     if (usageDashboardPanel) usageDashboardPanel.dataset.state = state;
-    if (usageDashboardLoading) usageDashboardLoading.hidden = state !== 'loading';
     if (usageDashboardError) {
       usageDashboardError.hidden = state !== 'error';
       usageDashboardError.textContent = state === 'error' ? usageDashboardState.error : '';
     }
     if (usageDashboardRefresh) {
-      usageDashboardRefresh.disabled = state === 'loading';
-      usageDashboardRefresh.setAttribute('aria-busy', state === 'loading' ? 'true' : 'false');
+      const refreshText = loading ? '整理中' : '刷新';
+      usageDashboardRefresh.disabled = loading;
+      usageDashboardRefresh.setAttribute('aria-busy', loading ? 'true' : 'false');
+      usageDashboardRefresh.setAttribute('aria-label', loading ? '正在整理统计数据' : '刷新统计');
+      usageDashboardRefresh.title = loading ? '正在整理统计数据' : '刷新统计';
+      if (usageDashboardRefreshLabel) usageDashboardRefreshLabel.textContent = refreshText;
     }
-    if (usageDashboardApply) usageDashboardApply.disabled = state === 'loading';
+    if (usageDashboardApply) usageDashboardApply.disabled = loading;
   }
 
   function formatUsageNumber(value) {
diff --git a/public/index.html b/public/index.html
index ab7bcf3..42ec2c0 100644
--- a/public/index.html
+++ b/public/index.html
@@ -24,7 +24,7 @@
       document.documentElement.dataset.dividerTime = dividerTime;
     })();
   </script>
-  <link rel="stylesheet" href="style.css?v=20260803-usage-statistics-echarts">
+  <link rel="stylesheet" href="style.css?v=20260805-usage-loading-inline">
   <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/styles/atom-one-dark.min.css">
 </head>
 <body>
@@ -164,7 +164,7 @@
                 <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
                   <path d="M21 12a9 9 0 0 0-15.12-6.6L3 8"></path><path d="M3 3v5h5"></path><path d="M3 12a9 9 0 0 0 15.12 6.6L21 16"></path><path d="M16 16h5v5"></path>
                 </svg>
-                <span>刷新</span>
+                <span id="usage-dashboard-refresh-label" aria-live="polite">刷新</span>
               </button>
               <button id="usage-dashboard-close" class="usage-dashboard__icon-button usage-dashboard__back" type="button" aria-label="返回聊天" title="返回聊天">
                 <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
@@ -196,7 +196,6 @@
           </div>
 
           <div class="usage-dashboard__body">
-            <div id="usage-dashboard-loading" class="usage-dashboard__loading" role="status" hidden>正在整理统计数据</div>
             <div id="usage-dashboard-error" class="usage-dashboard__error" role="alert" hidden></div>
 
             <section class="usage-dashboard__metric-grid" aria-label="统计概览">
@@ -387,6 +386,6 @@
   <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js"></script>
   <script src="https://cdnjs.cloudflare.com/ajax/libs/mermaid/10.9.1/mermaid.min.js"></script>
   <script src="vendor/echarts.min.js?v=5.6.0"></script>
-  <script src="app.js?v=20260803-usage-statistics-echarts"></script>
+  <script src="app.js?v=20260805-usage-loading-inline"></script>
 </body>
 </html>
diff --git a/public/style.css b/public/style.css
index 2626fcf..c3b0ac1 100644
--- a/public/style.css
+++ b/public/style.css
@@ -10209,7 +10209,6 @@ html[data-theme='gilded'] {
   scrollbar-gutter: stable;
 }
 
-.usage-dashboard__loading,
 .usage-dashboard__error {
   margin-bottom: 14px;
   padding: 10px 12px;
@@ -10220,18 +10219,6 @@ html[data-theme='gilded'] {
   font-size: 12px;
 }
 
-.usage-dashboard__loading::before {
-  content: '';
-  display: inline-block;
-  width: 9px;
-  height: 9px;
-  margin-right: 8px;
-  border: 2px solid var(--usage-dashboard-border);
-  border-top-color: var(--usage-dashboard-accent);
-  border-radius: 50%;
-  animation: usageDashboardSpin 800ms linear infinite;
-}
-
 .usage-dashboard__error {
   color: var(--usage-dashboard-danger);
   border-color: color-mix(in srgb, var(--usage-dashboard-danger) 30%, transparent);
@@ -10812,7 +10799,6 @@ html[data-theme='gilded'] {
   padding: 8px 14px 30px;
 }
 
-.usage-dashboard__loading,
 .usage-dashboard__error {
   margin-bottom: 10px;
 }
@@ -11950,7 +11936,6 @@ html[data-theme='wasteland'] :is(
   .usage-dashboard__dates input,
   .usage-dashboard__metric,
   .usage-dashboard__panel,
-  .usage-dashboard__loading,
   .usage-dashboard__error,
   .usage-dashboard__badge,
   .usage-dashboard__row-action
@@ -11973,7 +11958,6 @@ html[data-theme='wasteland'] .usage-dashboard__metric {
 
 @media (prefers-reduced-motion: reduce) {
   .usage-dashboard,
-  .usage-dashboard__loading::before,
   .usage-dashboard__refresh svg,
   .usage-dashboard-open,
   .usage-dashboard__icon-button,
@@ -11984,8 +11968,4 @@ html[data-theme='wasteland'] .usage-dashboard__metric {
     transition: none !important;
     scroll-behavior: auto !important;
   }
-
-  .usage-dashboard__loading::before {
-    border-color: var(--usage-dashboard-accent);
-  }
 }
diff --git a/scripts/regression.js b/scripts/regression.js
index 0d9db68..db25a7f 100644
--- a/scripts/regression.js
+++ b/scripts/regression.js
@@ -622,8 +622,8 @@ function assertFrontendSidebarCollapseContract() {
     'Rich themes should provide isolated rail treatments on top of the shared semantic fallback'
   );
   assert(
-    indexSource.includes('style.css?v=20260803-usage-statistics-echarts')
-      && indexSource.includes('app.js?v=20260803-usage-statistics-echarts'),
+    indexSource.includes('style.css?v=20260805-usage-loading-inline')
+      && indexSource.includes('app.js?v=20260805-usage-loading-inline'),
     'Sidebar interaction assets should share the reviewed cache-busting version'
   );
 }
@@ -946,8 +946,8 @@ function assertPlanListProgressContract() {
   assert(extractorSource.includes('references/source-assets/wasteland-icon-sheet.webp'), 'Plan progress extractor should read the archived source sheet');
   assert(!extractorSource.includes('sessions/_attachments'), 'Plan progress extractor should not depend on temporary session attachments');
 
-  assert(indexSource.includes('style.css?v=20260803-usage-statistics-echarts'), 'Plan progress CSS should use the current cache-busted URL');
-  assert(indexSource.includes('app.js?v=20260803-usage-statistics-echarts'), 'Plan progress frontend logic should use the current cache-busted URL');
+  assert(indexSource.includes('style.css?v=20260805-usage-loading-inline'), 'Plan progress CSS should use the current cache-busted URL');
+  assert(indexSource.includes('app.js?v=20260805-usage-loading-inline'), 'Plan progress frontend logic should use the current cache-busted URL');
 }
 
 function assertFrontendGildedThemeContract() {
@@ -1062,8 +1062,8 @@ function assertFrontendGildedThemeContract() {
   assert(contrast('#655446', '#fff7ea') >= 4.5, 'Gilded muted text should remain readable on ivory panels');
   assert(contrast('#fff7ea', '#7a3f20') >= 7, 'Gilded primary action text should reach AAA contrast on copper');
   assert(themeStyle.includes('@media (prefers-reduced-motion: reduce)'), 'Gilded theme motion should respect reduced-motion preferences');
-  assert(indexSource.includes('style.css?v=20260803-usage-statistics-echarts'), 'Theme bundle stylesheet should use the current cache-busted asset URL');
-  assert(indexSource.includes('app.js?v=20260803-usage-statistics-echarts'), 'Theme bundle app script should use the current cache-busted asset URL');
+  assert(indexSource.includes('style.css?v=20260805-usage-loading-inline'), 'Theme bundle stylesheet should use the current cache-busted asset URL');
+  assert(indexSource.includes('app.js?v=20260805-usage-loading-inline'), 'Theme bundle app script should use the current cache-busted asset URL');
 }
 
 function assertFrontendWastelandThemeContract() {
@@ -1316,8 +1316,8 @@ function assertFrontendWastelandThemeContract() {
     assert(contrast('#c9bda6', backgroundColor) >= 4.5, `Wasteland muted text should reach AA contrast on ${backgroundColor}`);
   });
 
-  assert(indexSource.includes('style.css?v=20260803-usage-statistics-echarts'), 'Wasteland stylesheet should share the cache-busted theme bundle URL');
-  assert(indexSource.includes('app.js?v=20260803-usage-statistics-echarts'), 'Wasteland registration should share the cache-busted theme bundle URL');
+  assert(indexSource.includes('style.css?v=20260805-usage-loading-inline'), 'Wasteland stylesheet should share the cache-busted theme bundle URL');
+  assert(indexSource.includes('app.js?v=20260805-usage-loading-inline'), 'Wasteland registration should share the cache-busted theme bundle URL');
 }
 
 function assertFrontendCcwebPromptContract() {
@@ -4449,8 +4449,8 @@ function assertAdvancedSessionSearchContract() {
     'Existing sidebar search clear control contract should remain unchanged');
   assert(indexSource.includes('id="advanced-search-panel"') && indexSource.includes('id="advanced-search-results"'),
     'Advanced search workspace should expose stable panel and result hooks');
-  assert(indexSource.includes('style.css?v=20260803-usage-statistics-echarts')
-    && indexSource.includes('app.js?v=20260803-usage-statistics-echarts'),
+  assert(indexSource.includes('style.css?v=20260805-usage-loading-inline')
+    && indexSource.includes('app.js?v=20260805-usage-loading-inline'),
   'Advanced search CSS and frontend script should share the reviewed cache-bust');
 
   const panelStyleStart = styleSource.indexOf('.advanced-search-panel {');
@@ -4500,12 +4500,45 @@ function assertAdvancedSessionSearchContract() {
 
   assert(searchIndexSource.includes("role !== 'user' && role !== 'assistant'")
     && searchIndexSource.includes("type === 'tool_use'")
+    && searchIndexSource.includes('function resultTime(result)')
+    && searchIndexSource.includes('resultTime(b) - resultTime(a)')
     && searchIndexSource.includes('MAX_QUERY_CHARS_HARD_LIMIT = 200')
     && searchIndexSource.includes('MAX_RESULTS_HARD_LIMIT = 50')
     && !searchIndexSource.includes('new RegExp('),
   'Search index should constrain input and exclude system/tool/attachment content without dynamic regexes');
 }
 
+async function assertAdvancedSearchTimeOrderingContract() {
+  const { createSessionSearchIndex } = require(SESSION_SEARCH_INDEX_PATH);
+  const tempRoot = fs.mkdtempSync(path.join(os.tmpdir(), 'cc-web-advanced-search-time-'));
+  try {
+    const sessionsDir = path.join(tempRoot, 'sessions');
+    mkdirp(sessionsDir);
+    fs.writeFileSync(path.join(sessionsDir, 'session-old-updated.json'), JSON.stringify({
+      id: 'session-old-updated',
+      title: '旧命中时间',
+      updated: '2026-08-05T12:00:00.000Z',
+      messages: [{ role: 'user', content: '同一关键词', timestamp: '2026-08-01T12:00:00.000Z' }],
+    }));
+    fs.writeFileSync(path.join(sessionsDir, 'session-new-message.json'), JSON.stringify({
+      id: 'session-new-message',
+      title: '新命中时间',
+      updated: '2026-08-01T12:00:00.000Z',
+      messages: [{ role: 'user', content: '同一关键词', timestamp: '2026-08-04T12:00:00.000Z' }],
+    }));
+    const index = createSessionSearchIndex({ sessionsDir, maxResults: 50 });
+    await index.initialize();
+    const result = index.search({ query: '同一关键词', sort: 'newest', matchMode: 'contains' });
+    assert(result.results[0]?.sessionId === 'session-new-message',
+      '最新优先应按命中消息时间排序，而不是按会话 updated 排序');
+    assert(result.results[0]?.matchTimestamp === '2026-08-04T12:00:00.000Z'
+      && result.results[0]?.sessionUpdated === '2026-08-01T12:00:00.000Z',
+    '搜索结果应同时保留命中消息时间和会话更新时间');
+  } finally {
+    fs.rmSync(tempRoot, { recursive: true, force: true });
+  }
+}
+
 function assertUsageStatisticsContract() {
   const serverSource = fs.readFileSync(SERVER_PATH, 'utf8');
   const frontendSource = fs.readFileSync(PUBLIC_APP_PATH, 'utf8');
@@ -4533,10 +4566,13 @@ function assertUsageStatisticsContract() {
     'Usage dashboard should be a chat-main-local workspace');
   assert(indexSource.includes('class="usage-dashboard-open"') && !indexSource.includes('class="settings-btn usage-dashboard-open"'),
     'Usage entry must use its own class so theme-specific settings pseudo-elements cannot leak');
-  assert(indexSource.includes('style.css?v=20260803-usage-statistics-echarts')
+  assert(indexSource.includes('style.css?v=20260805-usage-loading-inline')
     && indexSource.includes('vendor/echarts.min.js?v=5.6.0')
-    && indexSource.includes('app.js?v=20260803-usage-statistics-echarts'),
+    && indexSource.includes('app.js?v=20260805-usage-loading-inline'),
   'Usage dashboard CSS, local ECharts runtime, and frontend script should share the current asset contract');
+  assert(indexSource.includes('id="usage-dashboard-refresh-label" aria-live="polite"')
+    && !indexSource.includes('id="usage-dashboard-loading"'),
+  'Usage loading feedback should live inside the refresh action without inserting a temporary content row');
   assert(metricGridIndex > usagePanelIndex
     && primaryGridIndex > metricGridIndex
     && trendPanelIndex > primaryGridIndex
@@ -4577,7 +4613,11 @@ function assertUsageStatisticsContract() {
   assert(usageFunctions.includes("type: 'usage_stats_query'")
     && usageFunctions.includes('usageDashboardState.requestId')
     && usageFunctions.includes('usageDashboardDetail.dataset.motion')
-    && usageFunctions.includes('setUsageMcpDetailOpen'),
+    && usageFunctions.includes('setUsageMcpDetailOpen')
+    && usageFunctions.includes("const refreshText = loading ? '整理中' : '刷新'")
+    && usageFunctions.includes("setAttribute('aria-busy', loading ? 'true' : 'false')")
+    && !frontendSource.includes('usageDashboardLoading')
+    && !styleSource.includes('.usage-dashboard__loading'),
   'Usage dashboard should use an independent request id and use an in-context detail drawer with reduced-motion handling');
   assert(usageFunctions.includes('function getUsageEchart')
     && usageFunctions.includes('window.echarts')
@@ -5054,6 +5094,7 @@ async function main() {
     }
     if (regressionTarget === 'advanced-session-search') {
       assertAdvancedSessionSearchContract();
+      await assertAdvancedSearchTimeOrderingContract();
       await runAdvancedSessionSearchRegression();
       console.log('Advanced session search regression checks passed.');
       return;
@@ -5100,6 +5141,7 @@ async function main() {
   assertSessionSwitchResilienceContract();
   assertSessionSwitchRaceContract();
   assertAdvancedSessionSearchContract();
+  await assertAdvancedSearchTimeOrderingContract();
   assertUsageStatisticsUnitChecks();
   assertUsageStatisticsContract();
   assertCodexAppChildToolRoutingContract();