refactor: replace setTimeout polling with event relay in PdfEditor

The PdfEditor component was still using setTimeout-based polling to detect
when pdf-elements placement completed. With pdf-elements v1.2.0, this event
is now exposed directly via 'pdf-elements:adding-ended' event with a complete
event contract including the placement reason ('placed' or 'cancelled').

Changes:
- Remove pendingAddedObjectCount and pendingAddCheckTimer state
- Remove polling functions: clearPendingAddCheck, finishPendingAddCheck,
  checkSignerAdded, scheduleSignerAddedCheck
- Remove document event listener registration (mouseup, touchend, keyup)
- Add handleAddingEnded(event: Event) to relay pdf-elements:adding-ended
  directly to pdf-editor:adding-ended with the reason payload
- Update emit type definition to include payload with reason field

This completes the v1.2.0 migration from polling-based to event-driven
completion detection.

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

Author: vitormattos

src/components/PdfEditor/PdfEditor.vue

@@ -19,7 +19,8 @@
 			:style="toolbarStyleVars"
 			@pdf-elements:end-init="endInit"
 			@pdf-elements:object-click="handleObjectClick"
-			@pdf-elements:delete-object="handleDeleteObject">
+			@pdf-elements:delete-object="handleDeleteObject"
+			@pdf-elements:adding-ended="handleAddingEnded">
 			<template #actions="slotProps">
 				<slot name="actions" v-bind="slotProps">
 					<SignerMenu
@@ -150,13 +151,10 @@ const emit = defineEmits<{
 	(event: 'pdf-editor:end-init', payload: EndInitPayload): void
 	(event: 'pdf-editor:on-delete-signer', payload: VisibleElementRecord): void
 	(event: 'pdf-editor:object-click', payload: Record<string, unknown>): void
-	(event: 'pdf-editor:adding-ended'): void
+	(event: 'pdf-editor:adding-ended', payload: { reason?: string }): void
 }>()
 
 const pdfElements = ref<PdfElementsInstance | null>(null)
-const pendingAddedObjectCount = ref<number | null>(null)
-
-let pendingAddCheckTimer: ReturnType<typeof setTimeout> | null = null
 
 const ignoreClickOutsideSelectors = computed(() => ['.action-item__popper', '.action-item'])
 
@@ -268,50 +266,12 @@ function getTotalObjectsCount() {
 	}, 0)
 }
 
-function clearPendingAddCheck() {
-	if (pendingAddCheckTimer !== null) {
-		clearTimeout(pendingAddCheckTimer)
-		pendingAddCheckTimer = null
-	}
-	pendingAddedObjectCount.value = null
-}
-
-function finishPendingAddCheck() {
-	clearPendingAddCheck()
-	emit('pdf-editor:adding-ended')
-}
-
-function checkSignerAdded() {
-	const objectsBefore = pendingAddedObjectCount.value
-	if (objectsBefore === null) {
-		return
-	}
-
-	pendingAddCheckTimer = null
-	const isAddingMode = pdfElements.value?.isAddingMode === true
-	const objectsAfter = getTotalObjectsCount()
-
-	if (objectsAfter > objectsBefore) {
-		finishPendingAddCheck()
-		return
-	}
-
-	if (!isAddingMode) {
-		finishPendingAddCheck()
-		return
-	}
-}
+function handleAddingEnded(event: Event) {
+	emit('pdf-editor:adding-ended', {
+		reason: (event as CustomEvent)?.detail?.reason,
+	})
 
-function scheduleSignerAddedCheck() {
-	if (pendingAddedObjectCount.value === null) {
-		return
-	}
-	if (pendingAddCheckTimer !== null) {
-		clearTimeout(pendingAddCheckTimer)
-	}
-	pendingAddCheckTimer = setTimeout(checkSignerAdded, 0)
 }
-
 function startAddingSigner(signer: SignerSummaryRecord | SignerDetailRecord | null | undefined, size: { width?: number, height?: number }) {
 	if (!pdfElements.value || !size?.width || !size?.height) {
 		return false
@@ -330,17 +290,12 @@ function startAddingSigner(signer: SignerSummaryRecord | SignerDetailRecord | nu
 		height: size.height,
 		signer: signerPayload,
 	})
-	pendingAddedObjectCount.value = getTotalObjectsCount()
-	if (pendingAddCheckTimer !== null) {
-		clearTimeout(pendingAddCheckTimer)
-	}
 
 	return true
 }
 
 function cancelAdding() {
 	pdfElements.value?.cancelAdding()
-	clearPendingAddCheck()
 }
 
 async function addSigner(signer: SignerSummaryRecord | SignerDetailRecord, visibleElement: VisibleElementRecord, options: { documentIndex?: number } = {}) {
@@ -397,16 +352,11 @@ async function waitForPageRender(docIndex: number, pageIndex: number) {
 }
 
 onMounted(() => {
-	document.addEventListener('mouseup', scheduleSignerAddedCheck)
-	document.addEventListener('touchend', scheduleSignerAddedCheck)
-	document.addEventListener('keyup', scheduleSignerAddedCheck)
+	// PDF worker and listeners are already handled by pdf-elements component
 })
 
 onBeforeUnmount(() => {
-	document.removeEventListener('mouseup', scheduleSignerAddedCheck)
-	document.removeEventListener('touchend', scheduleSignerAddedCheck)
-	document.removeEventListener('keyup', scheduleSignerAddedCheck)
-	clearPendingAddCheck()
+	// Cleanup is handled by pdf-elements component
 })
 
 defineExpose({
@@ -431,8 +381,7 @@ defineExpose({
 	addSigner,
 	waitForPageRender,
 	getTotalObjectsCount,
-	checkSignerAdded,
-	scheduleSignerAddedCheck,
+	handleAddingEnded,
 })
 </script>