Fix sidebar dropdown positioning with fixed positioning to prevent overflow clipping and ensure proper menu display outside collapsed panels

frontend/style.css

@@ -424,6 +424,15 @@ select {
 /* Sidebar dropdown specific */
 .sidebar-dropdown {
   padding: 0 16px 12px;
+  position: relative;
+}
+
+.sidebar-dropdown .custom-dropdown-menu {
+  position: fixed;
+  z-index: 10000;
+  left: auto;
+  right: auto;
+  width: 248px;
 }
 
 .sidebar-dropdown .custom-dropdown-trigger {
@@ -481,6 +490,7 @@ select {
   flex: 1 1 auto;
   min-height: 0;
   max-height: none;
+  height: auto;
   padding-top: 0;
 }