Let Image and video LoRA stacks be reordered by dragging.

Co-authored-by: Cursor <cursoragent@cursor.com>

components/LoraSelect.vue

@@ -1,15 +1,38 @@
 <template>
   <div class="block min-w-0" :class="compact ? 'text-xs' : 'text-sm'">
     <span v-if="label" class="mb-1 block text-zinc-400">{{ label }}</span>
+    <p v-if="model.length > 1" class="mb-1 text-[11px] text-zinc-500">Drag to set chain order. Top applies first.</p>
     <ul v-if="model.length" class="space-y-2">
       <li
         v-for="(item, index) in model"
         :key="item.name"
-        class="rounded-xl border border-white/10 bg-zinc-950/80"
+        class="rounded-xl border bg-zinc-950/80"
-        :class="compact ? 'px-2 py-1.5' : 'px-3 py-2'"
+        :class="[
+          compact ? 'px-2 py-1.5' : 'px-3 py-2',
+          dragOverIndex === index ? 'border-amber-300/50' : 'border-white/10',
+          draggingIndex === index ? 'opacity-60' : ''
+        ]"
+        @dragover.prevent="onDragOver(index)"
+        @drop.prevent="onDrop(index)"
+        @dragleave="onDragLeave(index)"
       >
         <div class="flex items-center justify-between gap-2">
+          <div class="flex min-w-0 items-center gap-2">
+            <button
+              v-if="model.length > 1"
+              type="button"
+              class="shrink-0 cursor-grab touch-none text-zinc-500 hover:text-zinc-300 active:cursor-grabbing disabled:cursor-not-allowed disabled:opacity-40"
+              :disabled="disabled"
+              draggable="true"
+              title="Drag to reorder"
+              aria-label="Drag to reorder"
+              @dragstart="onDragStart(index, $event)"
+              @dragend="onDragEnd"
+            >
+              <span class="block leading-none" aria-hidden="true">⋮⋮</span>
+            </button>
             <span class="min-w-0 truncate text-zinc-200">{{ loraDisplayName(item.name) }}</span>
+          </div>
           <button
             type="button"
             class="shrink-0 text-[11px] text-zinc-500 hover:text-red-300 disabled:opacity-50"
@@ -111,6 +134,9 @@ const props = withDefaults(defineProps<{
 
 const model = defineModel<LoraStackItem[]>({ default: () => [] })
 
+const draggingIndex = ref<number | null>(null)
+const dragOverIndex = ref<number | null>(null)
+
 const availableNames = computed(() => {
   const taken = new Set(model.value.map(item => loraIdentityKey(item.name)))
   return props.names.filter(name => !taken.has(loraIdentityKey(name)))
@@ -134,6 +160,46 @@ function removeAt(index: number) {
   model.value = model.value.filter((_, i) => i !== index)
 }
 
+function moveItem(from: number, to: number) {
+  if (from === to || from < 0 || to < 0 || to >= model.value.length) return
+  const next = [...model.value]
+  const [item] = next.splice(from, 1)
+  next.splice(to, 0, item)
+  model.value = next
+}
+
+function onDragStart(index: number, event: DragEvent) {
+  if (props.disabled) {
+    event.preventDefault()
+    return
+  }
+  draggingIndex.value = index
+  dragOverIndex.value = index
+  event.dataTransfer?.setData('text/plain', String(index))
+  if (event.dataTransfer) event.dataTransfer.effectAllowed = 'move'
+}
+
+function onDragOver(index: number) {
+  if (draggingIndex.value === null || props.disabled) return
+  dragOverIndex.value = index
+}
+
+function onDragLeave(index: number) {
+  if (dragOverIndex.value === index) dragOverIndex.value = null
+}
+
+function onDrop(index: number) {
+  if (draggingIndex.value === null || props.disabled) return
+  moveItem(draggingIndex.value, index)
+  draggingIndex.value = null
+  dragOverIndex.value = null
+}
+
+function onDragEnd() {
+  draggingIndex.value = null
+  dragOverIndex.value = null
+}
+
 function setStrength(index: number, key: 'strengthModel' | 'strengthClip', event: Event) {
   const value = clampLoraStrength((event.target as HTMLInputElement).value)
   model.value = model.value.map((item, i) => i === index ? { ...item, [key]: value } : item)