fix: remove confusing custom resize handle and visual indicators (JeongJaeSoon#23)

Co-authored-by: Claude <[email protected]>

Author: kimjoin2

src/index.html

@@ -104,7 +104,6 @@
         <input type="range" id="opacity-slider" min="30" max="100" value="95" step="5">
       </div>
     </div>
-    <div class="resize-handle" id="resize-handle"></div>
   </div>
 
   <script src="../dist/renderer.js"></script>

src/styles/main.css

@@ -276,21 +276,6 @@ body {
   transform: scale(1.2);
 }
 
-.resize-handle {
-  position: absolute;
-  bottom: 0;
-  left: 0;
-  right: 0;
-  height: 8px;
-  background: transparent;
-  cursor: ns-resize;
-  -webkit-app-region: no-drag;
-}
-
-.resize-handle:hover {
-  background: rgba(74, 158, 255, 0.3);
-}
-
 /* Scrollbar styles */
 ::-webkit-scrollbar {
   width: 6px;