fix: stabilize usage loading and session search

.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');

.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": [
     {