feature/auto-hide-tab-bar fixed background color if theme applied

Author: rritik772

frontend/app/tab/tabbar.scss

@@ -39,7 +39,9 @@
 
     position: fixed;
     z-index: 1000;
-    background: var(--main-bg-color);
+    background: transparent;
+    backdrop-filter: blur(10px);
+    border-radius: 12px;
 
     transition: top 0.3s ease;
 }