fix(settings): restore theme toggle on OKX settings page

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/common/static/instance_theme.css

@@ -2182,6 +2182,13 @@ html[data-theme="light"] .journal-detail-img-thumb {
   flex-wrap: wrap;
 }
 
+.settings-account-summary-actions {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  flex-shrink: 0;
+}
+
 .settings-cards-grid {
   display: grid;
   grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
@@ -2464,12 +2471,21 @@ html[data-theme="light"] .settings-kv-value {
   color: #142232;
 }
 
-html[data-theme="light"] .settings-export-link {
-  background: #fff;
-  border-color: #b8c8d8;
+html[data-theme="light"] .settings-export-link,
+html[data-theme="light"] .settings-export-links-inline a {
+  background: transparent;
+  border-color: transparent;
   color: #1d4f8c;
 }
 
+html[data-theme="light"] .settings-side-export {
+  border-top-color: #d0dae4;
+}
+
+html[data-theme="light"] .settings-side-export-label {
+  color: #142232;
+}
+
 /* OKX 期权页 */
 .options-page-wrap {
   font-size: 0.8rem;