fix: hide logout and clean footer when sidebar collapsed

- Logout button (#logout-btn) hidden in collapsed mode
- Separator, empty divs, and version text hidden in collapsed mode
- Only avatar icon remains centered at bottom
- Border-top removed from footer when collapsed

Author: ddrayko

public/css/style.css

@@ -531,17 +531,25 @@ cap-widget {
 }
 
 .sidebar.collapsed .sidebar-footer {
-  padding: 8px 0;
+  border-top: none;
+  padding: 0 0 12px;
+}
+
+.sidebar.collapsed #logout-btn {
+  display: none;
 }
 
 .sidebar.collapsed .user-info {
   justify-content: center;
-  padding: 8px 0;
+  padding: 0;
 }
 
 .sidebar.collapsed .user-name,
-.sidebar.collapsed .user-email,
-.sidebar.collapsed .sidebar-footer > div:last-child {
+.sidebar.collapsed .user-email {
+  display: none;
+}
+
+.sidebar.collapsed .sidebar-footer > div:not(.user-info) {
   display: none;
 }