Node library side bar tab (#237)

* Basic tree

* Add node filter

* Fix key issue

* Add icons

* Node count

* nit

* Add node preview basics

* Node preview

* Make comfy node in node lib draggable

* Set drop target

* Add node on drop

* Drop on dynamic location

* nit

* nit

* Fix hover preview issue

* nit

* More visual diff between node and folder

* Add playwright test

* Add dep

* Get rid of screenshot test

src/components/sidebar/SideToolBar.vue

@@ -7,6 +7,7 @@
         :icon="tab.icon"
         :tooltip="tab.tooltip"
         :selected="tab === selectedTab"
+        :class="tab.id + '-tab-button'"
         @click="onTabClick(tab)"
       />
       <div class="side-tool-bar-end">

src/components/sidebar/tabs/NodeLibrarySideBarTab.vue

@@ -0,0 +1,99 @@
+<template>
+  <TreePlus
+    class="node-lib-tree"
+    v-model:expandedKeys="expandedKeys"
+    selectionMode="single"
+    :value="renderedRoot.children"
+    :filter="true"
+    filterMode="lenient"
+    dragSelector=".p-tree-node-leaf"
+    :pt="{
+      nodeLabel: 'node-lib-tree-node-label',
+      nodeChildren: ({ props }) => ({
+        'data-comfy-node-name': props.node?.data?.name,
+        onMouseenter: (event: MouseEvent) => {
+          hoveredComfyNodeName = props.node?.data?.name
+
+          const hoverTarget = event.target as HTMLElement
+          const targetRect = hoverTarget.getBoundingClientRect()
+          nodePreviewStyle.top = `${targetRect.top - 40}px`
+          nodePreviewStyle.left = `${targetRect.right}px`
+        },
+        onMouseleave: () => {
+          hoveredComfyNodeName = null
+        }
+      })
+    }"
+  >
+    <template #folder="{ node }">
+      <span class="folder-label">{{ node.label }}</span>
+      <Badge
+        :value="node.totalNodes"
+        severity="secondary"
+        :style="{ marginLeft: '0.5rem' }"
+      ></Badge>
+    </template>
+    <template #node="{ node }">
+      <span class="node-label">{{ node.label }}</span>
+    </template>
+  </TreePlus>
+  <div
+    v-if="hoveredComfyNode"
+    class="node-lib-node-preview"
+    :style="nodePreviewStyle"
+  >
+    <NodePreview
+      :key="hoveredComfyNode.name"
+      :nodeDef="hoveredComfyNode"
+    ></NodePreview>
+  </div>
+</template>
+
+<script setup lang="ts">
+import Badge from 'primevue/badge'
+import { ComfyNodeDefImpl, useNodeDefStore } from '@/stores/nodeDefStore'
+import { computed, ref } from 'vue'
+import { TreeNode } from 'primevue/treenode'
+import TreePlus from '@/components/primevueOverride/TreePlus.vue'
+import NodePreview from '@/components/NodePreview.vue'
+
+const nodeDefStore = useNodeDefStore()
+const expandedKeys = ref({})
+const hoveredComfyNodeName = ref<string | null>(null)
+const hoveredComfyNode = computed<ComfyNodeDefImpl | null>(() => {
+  if (!hoveredComfyNodeName.value) {
+    return null
+  }
+  return nodeDefStore.nodeDefsByName[hoveredComfyNodeName.value] || null
+})
+const nodePreviewStyle = ref<Record<string, string>>({
+  position: 'absolute',
+  top: '0px',
+  left: '0px'
+})
+
+const root = computed(() => nodeDefStore.nodeTree)
+const renderedRoot = computed(() => {
+  return fillNodeInfo(root.value)
+})
+const fillNodeInfo = (node: TreeNode): TreeNode => {
+  const isLeaf = node.children === undefined || node.children.length === 0
+  const isExpanded = expandedKeys.value[node.key]
+  const icon = isLeaf
+    ? 'pi pi-circle-fill'
+    : isExpanded
+      ? 'pi pi-folder-open'
+      : 'pi pi-folder'
+  const children = node.children?.map(fillNodeInfo)
+
+  return {
+    ...node,
+    icon,
+    children,
+    type: isLeaf ? 'node' : 'folder',
+    totalNodes: isLeaf
+      ? 1
+      : children.reduce((acc, child) => acc + child.totalNodes, 0)
+  }
+}
+</script>