WIP - add drag functionallity for page layouts

frontend/components/PageLayoutEditor.vue

@@ -16,7 +16,12 @@
         </div>
         
         <div class="border rounded-lg bg-slate-50 dark:bg-slate-900 p-4 min-h-[600px]">
-          <div ref="gridContainer" class="grid-stack">
+          <div 
+            ref="gridContainer" 
+            class="grid-stack"
+            @dragover.prevent="handleDragOver"
+            @drop="handleDrop"
+          >
             <!-- Grid items will be dynamically added here -->
           </div>
         </div>
@@ -25,12 +30,15 @@
       <!-- Available Fields Sidebar -->
       <div class="w-80 border-l bg-white dark:bg-slate-950 p-4 overflow-auto">
         <h3 class="text-lg font-semibold mb-4">Available Fields</h3>
-        <p class="text-xs text-muted-foreground mb-4">Click to add field to grid</p>
-        <div class="space-y-2">
+        <p class="text-xs text-muted-foreground mb-4">Click or drag to add field to grid</p>
+        <div class="space-y-2" id="sidebar-fields">
           <div
             v-for="field in availableFields"
             :key="field.id"
-            class="p-3 border rounded cursor-pointer bg-white dark:bg-slate-900 hover:border-primary hover:bg-slate-50 dark:hover:bg-slate-800 transition-colors"
+            class="p-3 border rounded cursor-move bg-white dark:bg-slate-900 hover:border-primary hover:bg-slate-50 dark:hover:bg-slate-800 transition-colors"
+            :data-field-id="field.id"
+            draggable="true"
+            @dragstart="handleDragStart($event, field)"
             @click="addFieldToGrid(field)"
           >
             <div class="font-medium text-sm">{{ field.label }}</div>
@@ -44,7 +52,7 @@
 </template>
 
 <script setup lang="ts">
-import { ref, onMounted, onBeforeUnmount, watch } from 'vue'
+import { ref, onMounted, onBeforeUnmount, watch, nextTick } from 'vue'
 import { GridStack } from 'gridstack'
 import 'gridstack/dist/gridstack.min.css'
 import type { FieldLayoutItem } from '~/types/page-layout'
@@ -79,9 +87,11 @@ const initGrid = () => {
   grid = GridStack.init({
     column: 6,
     cellHeight: 80,
-    minRow: 1,
+    minRow: 10,
     float: true,
     animate: true,
+    acceptWidgets: true,
+    disableOneColumnMode: true,
     resizable: {
       handles: 'e, w'
     }
@@ -95,7 +105,8 @@ const initGrid = () => {
   // Listen for item removal
   grid.on('removed', (event, items) => {
     items.forEach(item => {
-      const fieldId = item.el?.getAttribute('data-field-id')
+      const contentEl = item.el?.querySelector('.grid-stack-item-content')
+      const fieldId = contentEl?.getAttribute('data-field-id')
       if (fieldId) {
         placedFieldIds.value.delete(fieldId)
         gridItems.value.delete(fieldId)
@@ -121,10 +132,46 @@ const loadLayout = (layout: FieldLayoutItem[]) => {
 }
 
 const handleDragStart = (event: DragEvent, field: FieldConfig) => {
-  // Store field data for drop event
-  event.dataTransfer?.setData('field', JSON.stringify(field))
+  if (event.dataTransfer) {
+    event.dataTransfer.effectAllowed = 'copy';
+    event.dataTransfer.setData('application/json', JSON.stringify(field));
+  }
 }
 
+const handleDragOver = (event: DragEvent) => {
+  event.preventDefault();
+  if (event.dataTransfer) {
+    event.dataTransfer.dropEffect = 'copy';
+  }
+};
+
+const handleDrop = (event: DragEvent) => {
+  event.preventDefault();
+  
+  const fieldData = event.dataTransfer?.getData('application/json');
+  if (!fieldData || !grid) return;
+  
+  const field = JSON.parse(fieldData);
+  
+  // Get the grid bounding rect
+  const gridRect = gridContainer.value?.getBoundingClientRect();
+  if (!gridRect) return;
+  
+  // Calculate grid position from drop coordinates
+  const x = event.clientX - gridRect.left;
+  const y = event.clientY - gridRect.top;
+  
+  // Convert pixels to grid coordinates (approx)
+  const cellWidth = gridRect.width / 6; // 6 columns
+  const cellHeight = 80; // from our config
+  
+  const gridX = Math.floor(x / cellWidth);
+  const gridY = Math.floor(y / cellHeight);
+  
+  // Add the field at the calculated position
+  addFieldToGrid(field, gridX, gridY);
+};
+
 const addFieldToGrid = (field: FieldConfig, x?: number, y?: number, w: number = 3, h: number = 1) => {
   if (!grid || placedFieldIds.value.has(field.id)) return