Fix user menu in dark mode.

static/css/dark-mode.css

@@ -656,6 +656,7 @@
     background-color: var(--dropdown-bg) !important;
     border: 1px solid var(--border-primary);
     box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3) !important;
+    z-index: 1000 !important; /* Ensure dropdown is above other elements */
 }
 
 [data-theme="dark"] .user-dropdown-header {
@@ -685,6 +686,13 @@
     border-top: 1px solid var(--border-primary);
 }
 
+/* Fix dropdown toggle interaction in dark mode */
+[data-theme="dark"] .user-dropdown-toggle {
+    position: relative;
+    z-index: 10;
+    cursor: pointer;
+}
+
 /* Override mobile-specific white background */
 @media (max-width: 1024px) {
     [data-theme="dark"] .sidebar.active .user-dropdown-modal.active,