feat: better close button color in the image option in ai panel

Author: devvaannsh

src/styles/Extn-AIChatPanel.less

@@ -1887,31 +1887,28 @@
 
             .ai-image-remove {
                 position: absolute;
-                top: -6px;
-                right: -6px;
-                width: 16px;
-                height: 16px;
+                top: -8px;
+                right: -8px;
+                width: 20px;
+                height: 20px;
                 border-radius: 50%;
-                background: rgba(255, 255, 255, 0.12);
-                border: 1px solid rgba(255, 255, 255, 0.18);
-                color: rgba(255, 255, 255, 0.7);
-                font-size: 11px;
+                background: rgba(0, 0, 0, 0.6);
+                border: 1px solid rgba(255, 255, 255, 0.3);
+                color: #fff;
+                font-size: 12px;
+                line-height: 1;
                 padding: 0;
-                display: none;
+                display: flex;
                 align-items: center;
                 justify-content: center;
                 cursor: pointer;
                 transition: background 150ms, color 150ms;
 
                 &:hover {
-                    background: rgba(255, 255, 255, 0.22);
+                    background: rgba(255, 255, 255, 0.25);
                     color: #fff;
                 }
             }
-
-            &:hover .ai-image-remove {
-                display: flex;
-            }
         }
 
         .ai-file-chip {