test(signers): update draggable stub for vuedraggable 4 slot API

The draggable stub must render the #item named slot (not the default
slot) to match vuedraggable 4's internal contract. Without this the
stub never renders any Signer children, making all rendering assertions
pass vacuously.

- Replace template '<div><slot /></div>' with a loop over modelValue
  that yields '<slot name="item" :element :index />' per entry
- Add itemKey to accepted props (vuedraggable 4 requires it)
- Remove transition-group stub (no longer used in Signers.vue)

Signed-off-by: Vitor Mattos <1079143+vitormattos@users.noreply.github.com>

Author: vitormattos

src/tests/components/Signers/Signers.spec.ts

@@ -36,14 +36,17 @@ describe('Signers', () => {
 				plugins: [pinia],
 				stubs: {
 					Signer: true,
+					// Stub for vuedraggable 4 (Vue 3) which uses #item slot per element
 					draggable: {
 						name: 'draggable',
-						template: '<div><slot /></div>',
-						props: ['modelValue', 'tag', 'handle', 'class', 'chosenClass', 'dragClass'],
-					},
-					'transition-group': {
-						name: 'transition-group',
-						template: '<div><slot /></div>',
+						template: `
+							<div>
+								<template v-for="(element, index) in modelValue" :key="index">
+									<slot name="item" :element="element" :index="index" />
+								</template>
+							</div>
+						`,
+						props: ['modelValue', 'itemKey', 'tag', 'handle', 'class', 'chosenClass', 'dragClass'],
 					},
 				},
 			},