fix: address small CodeRabbit issues (#9229)

## Summary

Address several small CodeRabbit-filed issues: clipboard simplification,
queue getter cleanup, pointer handling, and test parameterization.

## Changes

- **What**:
- Simplify `useCopyToClipboard` by using VueUse's built-in `legacy` mode
instead of a manual `document.execCommand` fallback
- Remove `queueIndex` getter alias from `TaskItemImpl`, replace all
usages with `job.priority`
- Add `pointercancel` event handling and try-catch around
`releasePointerCapture` in `useNodeResize` to prevent stuck resize state
- Parameterize repetitive `getNodeProvider` tests in
`modelToNodeStore.test.ts` using `it.each()`

- Fixes #9024
- Fixes #7955
- Fixes #7323
- Fixes #8703

## Review Focus

- `useCopyToClipboard`: VueUse's `legacy: true` enables the
`execCommand` fallback internally — verify browser compat is acceptable
- `useNodeResize`: cleanup logic extracted into shared function used by
both `pointerup` and `pointercancel`

src/composables/useCopyToClipboard.ts

@@ -4,64 +4,32 @@ import { useToast } from 'primevue/usetoast'
 import { t } from '@/i18n'
 
 export function useCopyToClipboard() {
-  const { copy, copied } = useClipboard()
+  const { copy, copied } = useClipboard({ legacy: true })
   const toast = useToast()
-  const showSuccessToast = () => {
-    toast.add({
-      severity: 'success',
-      summary: t('g.success'),
-      detail: t('clipboard.successMessage'),
-      life: 3000
-    })
-  }
-  const showErrorToast = () => {
-    toast.add({
-      severity: 'error',
-      summary: t('g.error'),
-      detail: t('clipboard.errorMessage')
-    })
-  }
 
-  function fallbackCopy(text: string) {
-    const textarea = document.createElement('textarea')
-    textarea.setAttribute('readonly', '')
-    textarea.value = text
-    textarea.style.position = 'absolute'
-    textarea.style.left = '-9999px'
-    textarea.setAttribute('aria-hidden', 'true')
-    textarea.setAttribute('tabindex', '-1')
-    textarea.style.width = '1px'
-    textarea.style.height = '1px'
-    document.body.appendChild(textarea)
-    textarea.select()
-
-    try {
-      // using legacy document.execCommand for fallback for old and linux browsers
-      const successful = document.execCommand('copy')
-      if (successful) {
-        showSuccessToast()
-      } else {
-        showErrorToast()
-      }
-    } catch (err) {
-      showErrorToast()
-    } finally {
-      textarea.remove()
-    }
-  }
-
-  const copyToClipboard = async (text: string) => {
+  async function copyToClipboard(text: string) {
     try {
       await copy(text)
       if (copied.value) {
-        showSuccessToast()
+        toast.add({
+          severity: 'success',
+          summary: t('g.success'),
+          detail: t('clipboard.successMessage'),
+          life: 3000
+        })
       } else {
-        // If VueUse copy failed, try fallback
-        fallbackCopy(text)
+        toast.add({
+          severity: 'error',
+          summary: t('g.error'),
+          detail: t('clipboard.errorMessage')
+        })
       }
-    } catch (err) {
-      // VueUse copy failed, try fallback
-      fallbackCopy(text)
+    } catch {
+      toast.add({
+        severity: 'error',
+        summary: t('g.error'),
+        detail: t('clipboard.errorMessage')
+      })
     }
   }