fix: increase Vue node resize handle size for better usability (#8391)

## Summary

Increases the resize handle size on Vue nodes to improve usability,
especially when nodes are selected.

## Changes

- **What**: Increased resize handle from 12px to 20px and offset it
slightly outside the node boundary to avoid overlap with selection
outline

## Review Focus

The resize handle was too small and became harder to grab when the node
was selected (the 2px outline rendered outside the box, visually
obscuring the corner). This fix increases the hit area and positions it
to extend beyond the node edge.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8391-fix-increase-Vue-node-resize-handle-size-for-better-usability-2f76d73d36508136b2aac51bc0d53551)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Subagent 5 <subagent@example.com>
Co-authored-by: Amp <amp@ampcode.com>
Co-authored-by: GitHub Action <action@github.com>

src/renderer/extensions/vueNodes/components/LGraphNode.vue

@@ -150,7 +150,9 @@
       v-if="!isCollapsed && nodeData.resizable !== false"
       role="button"
       :aria-label="t('g.resizeFromBottomRight')"
-      :class="cn(baseResizeHandleClasses, 'right-0 bottom-0 cursor-se-resize')"
+      :class="
+        cn(baseResizeHandleClasses, '-right-1 -bottom-1 cursor-se-resize')
+      "
       @pointerdown.stop="handleResizePointerDown"
     />
   </div>
@@ -344,7 +346,7 @@ function initSizeStyles() {
 }
 
 const baseResizeHandleClasses =
-  'absolute h-3 w-3 opacity-0 pointer-events-auto focus-visible:outline focus-visible:outline-2 focus-visible:outline-white/40'
+  'absolute h-5 w-5 opacity-0 pointer-events-auto focus-visible:outline focus-visible:outline-2 focus-visible:outline-white/40'
 
 const MIN_NODE_WIDTH = 225