fix: skip text-editable elements in processKey

Broaden the target guard in processKey to skip all text-editable surfaces
(input, textarea, contenteditable) before handling shortcuts. This prevents
space/Ctrl+A/C from being blocked when typing in prompt textareas or other
multiline fields in Vue nodes mode.

src/lib/litegraph/src/LGraphCanvas.ts

@@ -3716,8 +3716,13 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     if (!graph) return
 
     let block_default = false
-    // @ts-expect-error EventTarget.localName is not in standard types
-    if (e.target.localName == 'input') return
+    // Skip all text-editable surfaces to avoid blocking typing/selection/copy
+    const target = e.target as HTMLElement | null
+    if (
+      target?.localName === 'input' ||
+      target?.localName === 'textarea' ||
+      target?.isContentEditable
+    ) return
 
     if (e.type == 'keydown') {
       // TODO: Switch