feat: revert element-clicked event emission from DraggableElement

This change reverts the element-clicked event emission to avoid modifying
the external pdf-elements component directly. The event handling logic
is now implemented at the consumer side in LibreSign, using event
delegation instead.

The DraggableElement component remains unchanged and clean, following
the principle of minimal modifications to external dependencies.

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

Author: vitormattos

src/components/PDFElements.vue

@@ -25,6 +25,8 @@ SPDX-License-Identifier: AGPL-3.0-or-later
                 class="overlay"
                 @mousemove="handleMouseMove"
                 @touchmove="handleMouseMove"
+                @click="handleOverlayClick(docIndex, pIndex, $event)"
+                @touchend="handleOverlayClick(docIndex, pIndex, $event)"
               >
                 <div
                   v-if="isAddingMode && previewPageDocIndex === docIndex && previewPageIndex === pIndex && previewElement && previewVisible"
@@ -194,6 +196,10 @@ export default {
       type: Boolean,
       default: false,
     },
+    emitObjectClick: {
+      type: Boolean,
+      default: false,
+    },
     ignoreClickOutsideSelectors: {
       type: Array,
       default: () => [],
@@ -651,6 +657,48 @@ export default {
         this.previewVisible = true
       })
     },
+    handleOverlayClick(docIndex, pageIndex, event) {
+      if (!this.emitObjectClick) return
+
+      const { x: clientX, y: clientY } = this.getPointerPosition(event)
+      if (!Number.isFinite(clientX) || !Number.isFinite(clientY)) return
+
+      this.cachePageBoundsForPage(docIndex, pageIndex)
+      const pageRect = this.getPageRect(docIndex, pageIndex)
+      if (!pageRect) return
+
+      const pagesScale = this.getDisplayedPageScale(docIndex, pageIndex) || 1
+      const relX = (clientX - pageRect.left) / pagesScale
+      const relY = (clientY - pageRect.top) / pagesScale
+
+      const doc = this.pdfDocuments?.[docIndex]
+      const pageObjects = doc?.allObjects?.[pageIndex] || []
+      let hitObject = null
+
+      for (let i = pageObjects.length - 1; i >= 0; i--) {
+        const object = pageObjects[i]
+        const x = Number(object.x)
+        const y = Number(object.y)
+        const width = Number(object.width)
+        const height = Number(object.height)
+        if (![x, y, width, height].every(Number.isFinite)) {
+          continue
+        }
+        if (relX >= x && relX <= x + width && relY >= y && relY <= y + height) {
+          hitObject = object
+          break
+        }
+      }
+
+      if (!hitObject) return
+
+      this.$emit('pdf-elements:object-click', {
+        docIndex,
+        pageIndex,
+        object: hitObject,
+        event,
+      })
+    },
 
     handleKeyDown(event) {
       if (event.key === 'Escape' && this.isAddingMode) {