enlarged node resizer border for easier resizing

frontend/src/components/canvas/nodes/BaseNode.tsx

@@ -66,7 +66,7 @@ export function BaseNode({ id, data, selected, icon: typeIcon, width, height }:
         minWidth={140}
         minHeight={50}
         lineStyle={{ borderColor: 'transparent' }}
-        handleStyle={{ borderColor: colors.border, background: colors.border, width: 8, height: 8 }}
+        handleStyle={{ borderColor: colors.border, background: colors.border, width: 16, height: 16 }}
       />
       <Handle
         type="source"

frontend/src/components/canvas/nodes/ProxmoxGroupNode.tsx

@@ -53,7 +53,7 @@ export function ProxmoxGroupNode(props: NodeProps<Node<NodeData>>) {
         minHeight={160}
         isVisible={selected}
         lineStyle={{ borderColor: glow, opacity: 0.6 }}
-        handleStyle={{ borderColor: glow, backgroundColor: theme.colors.nodeCardBackground }}
+        handleStyle={{ borderColor: glow, backgroundColor: theme.colors.nodeCardBackground, width: 6, height: 6 }}
       />
 
       {/* Group border */}