diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index cf171a0..3fb1cbc 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -17,14 +17,30 @@
 
     <div class="main-content">
       <aside class="node-sidebar">
-        <div v-for="category in nodeCategories" :key="category.key" class="node-section">
-          <div class="section-title">{{ category.label }}</div>
-          <div class="node-list">
-            <div v-for="n in category.nodes" :key="n.type" class="node-item" draggable="true" @dragstart="onDragStart($event, n.type)">
-              <span class="node-icon">
-                <Icon :icon="n.icon" width="18" />
-              </span>
-              <span class="node-label">{{ n.label }}</span>
+        <div class="node-section-list">
+          <div
+            v-for="category in nodeCategories"
+            :key="category.key"
+            class="node-section"
+            :class="{ 'is-collapsed': isSectionCollapsed(category.key) }"
+          >
+            <button class="section-header" type="button" @click="toggleSection(category.key)">
+              <span class="section-title">{{ category.label }}</span>
+              <Icon :icon="isSectionCollapsed(category.key) ? 'mdi:chevron-down' : 'mdi:chevron-up'" width="16" />
+            </button>
+            <div class="node-list" v-show="!isSectionCollapsed(category.key)">
+              <div
+                v-for="n in category.nodes"
+                :key="n.type"
+                class="node-item"
+                draggable="true"
+                @dragstart="onDragStart($event, n.type)"
+              >
+                <span class="node-icon">
+                  <Icon :icon="n.icon" width="18" />
+                </span>
+                <span class="node-label">{{ n.label }}</span>
+              </div>
             </div>
           </div>
         </div>
@@ -173,6 +189,18 @@ const contextMenu = ref({
 })
 
 const paneClickPosition = ref({ x: 0, y: 0 })
+const collapsedSections = ref<Record<string, boolean>>(
+  nodeCategories.reduce((acc, category) => {
+    acc[category.key] = false
+    return acc
+  }, {} as Record<string, boolean>)
+)
+
+const toggleSection = (key: string) => {
+  collapsedSections.value[key] = !isSectionCollapsed(key)
+}
+
+const isSectionCollapsed = (key: string) => collapsedSections.value[key] ?? false
 
 const spawnNodeAt = (type: string, screenPoint: { x: number; y: number }) => {
   const position = screenToFlowCoordinate({ x: screenPoint.x, y: screenPoint.y })
@@ -442,9 +470,27 @@ html, body, #app { height: 100%; font-family: -apple-system, BlinkMacSystemFont,
   display: flex;
   flex-direction: column;
   flex-shrink: 0;
+  overflow: hidden;
+}
+.node-section-list {
+  flex: 1;
+  overflow-y: auto;
 }
 .node-section { padding: 16px; border-bottom: 1px solid #f0f0f0; }
-.section-title { font-size: 12px; color: #999; margin-bottom: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
+.section-header {
+  width: 100%;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  background: none;
+  border: none;
+  padding: 0;
+  margin: 0 0 12px;
+  cursor: pointer;
+  color: #999;
+}
+.section-title { font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
+.node-section.is-collapsed .section-title { color: #bbb; }
 .node-list { display: flex; flex-direction: column; gap: 8px; }
 .node-item {
   display: flex;
diff --git a/frontend/src/components/nodes/DataInputNode/index.scss b/frontend/src/components/nodes/DataInputNode/index.scss
index 4df2d1f..00bdef4 100644
--- a/frontend/src/components/nodes/DataInputNode/index.scss
+++ b/frontend/src/components/nodes/DataInputNode/index.scss
@@ -1,3 +1,7 @@
-:global(.vue-flow__node-dataInputNode) {
+:global(.vue-flow__node-dataInputNode) {
   min-width: 200px;
 }
+
+.data-input-node__file-input {
+  display: none;
+}
diff --git a/frontend/src/components/nodes/DataInputNode/index.vue b/frontend/src/components/nodes/DataInputNode/index.vue
index 85b558e..08b2774 100644
--- a/frontend/src/components/nodes/DataInputNode/index.vue
+++ b/frontend/src/components/nodes/DataInputNode/index.vue
@@ -1,4 +1,4 @@
-<template>
+<template>
   <div class="data-input-node">
     <StandardNode
       :icon="definition.icon"
@@ -10,18 +10,94 @@
       :handles="definition.handles"
       :body-items="bodyItems"
       :selected="props.selected"
-    />
+    >
+      <template #body-append>
+        <div class="node-control">
+          <span class="node-control__label">Source</span>
+          <el-select
+            size="small"
+            :model-value="props.data.sourceType"
+            placeholder="Choose source"
+            @change="handleSourceTypeChange"
+          >
+            <el-option
+              v-for="option in sourceOptions"
+              :key="option.value"
+              :label="option.label"
+              :value="option.value"
+            />
+          </el-select>
+        </div>
+        <div class="node-control">
+          <span class="node-control__label">File</span>
+          <div class="node-control__field">
+            <el-input
+              size="small"
+              :model-value="props.data.filePath"
+              placeholder="No file selected"
+              readonly
+            />
+            <el-button size="small" type="primary" link @click="triggerFileDialog">Browse</el-button>
+          </div>
+          <input
+            ref="fileInputRef"
+            class="data-input-node__file-input"
+            type="file"
+            @change="handleFileSelect"
+          />
+        </div>
+        <div class="node-control__actions">
+          <el-button size="small" type="success" plain @click="handleSync">
+            Load Data
+          </el-button>
+        </div>
+      </template>
+    </StandardNode>
   </div>
 </template>
 
 <script setup lang="ts">
+import { ref } from 'vue'
 import { Position } from '@vue-flow/core'
+import { useFlowStore } from '@/stores/flow'
 import StandardNode from '../shared/StandardNode.vue'
 import { useStandardNode } from '../shared/useStandardNode'
 import type { BaseNodeProps } from '../shared/types'
 import type { DataInputNodeData } from './types'
 
 const props = defineProps<BaseNodeProps<DataInputNodeData>>()
+const store = useFlowStore()
+
+const fileInputRef = ref<HTMLInputElement | null>(null)
+const sourceOptions = [
+  { label: 'File Upload', value: 'file' },
+  { label: 'API Endpoint', value: 'api' },
+  { label: 'Database', value: 'database' }
+]
+
+const handleSourceTypeChange = (value: string) => {
+  store.updateNodeData(props.id, { sourceType: value })
+}
+
+const triggerFileDialog = () => {
+  fileInputRef.value?.click()
+}
+
+const handleFileSelect = (event: Event) => {
+  const target = event.target as HTMLInputElement
+  const file = target.files?.[0]
+  if (file) {
+    store.updateNodeData(props.id, { filePath: file.name })
+  }
+  target.value = ''
+}
+
+const handleSync = () => {
+  store.updateNodeData(props.id, {
+    status: 'Preparing',
+    lastSync: new Date().toLocaleTimeString()
+  })
+}
 
 const { definition, bodyItems, badge, status } = useStandardNode(props, {
   icon: 'mdi:database-import',
@@ -31,11 +107,12 @@ const { definition, bodyItems, badge, status } = useStandardNode(props, {
   handles: {
     outputs: [Position.Right]
   },
-  status: ({ data }) => data.status ?? '待运行',
+  status: ({ data }) => data.status ?? 'Idle',
   badge: ({ data }) => data.format ?? '自动检测',
   body: ({ data }) => [
     { label: '来源', value: data.sourceType ?? '未配置' },
-    { label: '路径', value: data.filePath ?? '待绑定' }
+    { label: '路径', value: data.filePath ?? '待绑定' },
+    { label: 'Last Sync', value: data.lastSync ?? 'Never' }
   ]
 })
 </script>
diff --git a/frontend/src/components/nodes/DataInputNode/types.ts b/frontend/src/components/nodes/DataInputNode/types.ts
index 40c9d42..8cc9f70 100644
--- a/frontend/src/components/nodes/DataInputNode/types.ts
+++ b/frontend/src/components/nodes/DataInputNode/types.ts
@@ -5,6 +5,7 @@ export interface DataInputNodeData {
   filePath?: string
   format?: string
   status?: string
+  lastSync?: string
 }
 
 export type DataInputNodeProps = BaseNodeProps<DataInputNodeData>
diff --git a/frontend/src/components/nodes/shared/StandardNode.vue b/frontend/src/components/nodes/shared/StandardNode.vue
index bbc3bd8..a8c6d1d 100644
--- a/frontend/src/components/nodes/shared/StandardNode.vue
+++ b/frontend/src/components/nodes/shared/StandardNode.vue
@@ -11,7 +11,7 @@
       <span v-if="badge" class="standard-node__badge">{{ badge }}</span>
     </div>
     <div class="standard-node__body">
-      <slot name="body">
+      <slot name="body" :items="bodyItems">
         <div
           v-for="item in bodyItems"
           :key="item.label"
@@ -20,6 +20,9 @@
           <span class="row-label">{{ item.label }}</span>
           <span class="row-value">{{ item.value }}</span>
         </div>
+        <div v-if="$slots['body-append']" class="standard-node__controls">
+          <slot name="body-append" />
+        </div>
       </slot>
     </div>
     <div class="standard-node__footer">
diff --git a/frontend/src/components/nodes/shared/standard-node.scss b/frontend/src/components/nodes/shared/standard-node.scss
index 70ebc03..d9bd300 100644
--- a/frontend/src/components/nodes/shared/standard-node.scss
+++ b/frontend/src/components/nodes/shared/standard-node.scss
@@ -68,6 +68,44 @@
   color: #4a4a4a;
 }
 
+.standard-node__controls {
+  margin-top: 6px;
+  padding-top: 6px;
+  border-top: 1px dashed rgba(0, 0, 0, 0.08);
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+
+.standard-node__controls .node-control {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+}
+
+.standard-node__controls .node-control__label {
+  font-size: 11px;
+  color: #8c8c8c;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+}
+
+.standard-node__controls .node-control__field {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.standard-node__controls .node-control__actions {
+  display: flex;
+  justify-content: flex-end;
+}
+
+.standard-node__controls :deep(.el-select),
+.standard-node__controls :deep(.el-input) {
+  width: 100%;
+}
+
 .standard-node__row {
   display: flex;
   justify-content: space-between;