refactor(browser-hint-overlay): remove arrow element and adjust grid layout

src/app/chat/components/browser-hint-overlay.module.css

@@ -5,7 +5,7 @@
   top: var(--spacing-2, 8px);
   right: var(--spacing-2, 8px);
   display: grid;
-  grid-template-columns: auto minmax(0, 1fr) auto;
+  grid-template-columns: auto minmax(0, 1fr);
   align-items: center;
   gap: 8px;
   z-index: 20;
@@ -65,19 +65,6 @@
   overflow-wrap: break-word;
 }
 
-.arrow {
-  display: inline-flex;
-  width: 18px;
-  height: 18px;
-  align-items: center;
-  justify-content: center;
-  color: #fff;
-  font-size: 15px;
-  font-weight: 800;
-  line-height: 1;
-  opacity: 0.86;
-}
-
 .overlay:hover {
   border-color: rgba(255, 255, 255, 0.28);
   box-shadow: