Use auto-fit grid for funds and dashboard account cards

Account cards expand to fill available width when fewer exchanges are enabled instead of staying in fixed four-column tracks.

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

manual_trading_hub/static/app.css

@@ -5902,7 +5902,7 @@ html[data-theme="light"] .funds-chart-panel {
 }
 .funds-accounts {
   display: grid;
-  grid-template-columns: repeat(4, minmax(0, 1fr));
+  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
   gap: 12px;
   padding: 4px 0 12px;
 }
@@ -6141,11 +6141,6 @@ html[data-theme="light"] .funds-fs-panel {
 body.funds-fullscreen-open {
   overflow: hidden;
 }
-@media (max-width: 1100px) {
-  .funds-accounts {
-    grid-template-columns: repeat(2, minmax(0, 1fr));
-  }
-}
 @media (max-width: 720px) {
   .funds-accounts {
     grid-template-columns: minmax(0, 1fr);

manual_trading_hub/static/dashboard.css

@@ -209,7 +209,7 @@ body.hub-page-dashboard .page#page-dashboard {
 
 .dash-ac-grid {
   display: grid;
-  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
+  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
   gap: 12px;
   padding: 14px;
 }