feat: no tooltip shown on custom node

frontend/src/components/WorkflowNode.vue

@@ -87,7 +87,7 @@ onUnmounted(() => {
 </script>
 
 <template>
-  <RichTooltip :content="nodeHelpContent" placement="top">
+  <RichTooltip v-if="nodeHelpContent" :content="nodeHelpContent" placement="top">
     <div class="workflow-node-container">
       <div v-if="props.sprite" class="workflow-node-sprite">
         <img :src="currentSprite" :alt="`${nodeId} sprite`" class="node-sprite-image" />
@@ -123,6 +123,40 @@ onUnmounted(() => {
       </div>
     </div>
   </RichTooltip>
+  <div v-else class="workflow-node-container">
+    <div v-if="props.sprite" class="workflow-node-sprite">
+      <img :src="currentSprite" :alt="`${nodeId} sprite`" class="node-sprite-image" />
+    </div>
+    <div
+      class="workflow-node"
+      :class="{ 'workflow-node-active': isActive }"
+      :data-type="nodeType"
+      :style="dynamicStyles"
+      @mouseenter="$emit('hover', nodeId)"
+      @mouseleave="$emit('leave', nodeId)"
+    >
+      <div class="workflow-node-header">
+        <span class="workflow-node-type">{{ nodeType }}</span>
+        <span class="workflow-node-id">{{ nodeId }}</span>
+      </div>
+      <div v-if="nodeDescription" class="workflow-node-description">
+        {{ nodeDescription }}
+      </div>
+
+      <Handle
+        id="source"
+        type="source"
+        :position="Position.Right"
+        class="workflow-node-handle"
+      />
+      <Handle
+        id="target"
+        type="target"
+        :position="Position.Left"
+        class="workflow-node-handle"
+      />
+    </div>
+  </div>
 </template>
 
 <style scoped>

frontend/src/utils/helpContent.js

@@ -34,7 +34,7 @@ export const helpContent = {
     },
     python: {
       title: "Python Node",
-      description: "Executes Python code in a sandboxed environment. The code runs in the workspace directory and can access uploaded files.",
+      description: "Executes Python code on your local environment. The code runs in the workspace directory and can access uploaded files.",
       examples: [
         "Data processing and analysis",
         "Running generated code",
@@ -160,7 +160,7 @@ export const helpContent = {
 /**
  * Get help content by key path
  * @param {string} key - Dot-separated path to content (e.g., 'workflowNode.agent')
- * @returns {Object} Help content object or fallback
+ * @returns {Object|null} Help content object or null if not found
  */
 export function getHelpContent(key) {
   const keys = key.split('.')
@@ -170,11 +170,8 @@ export function getHelpContent(key) {
     if (content && typeof content === 'object' && k in content) {
       content = content[k]
     } else {
-      console.warn(`[HelpContent] Missing content for key: ${key}`)
-      return {
-        description: "Help content coming soon. Check the tutorial for more information.",
-        learnMoreUrl: "/tutorial"
-      }
+      // Return null for missing content instead of fallback
+      return null
     }
   }
 
@@ -183,17 +180,25 @@ export function getHelpContent(key) {
     return { description: content }
   }
 
-  return content || { description: "Help content coming soon." }
+  return content || null
 }
 
 /**
  * Get node-specific help content based on node type
  * @param {string} nodeType - The type of node (agent, human, python, etc.)
- * @returns {Object} Help content for that node type
+ * @returns {Object|null} Help content for that node type, or null for unknown types
  */
 export function getNodeHelp(nodeType) {
-  const type = (nodeType || 'unknown').toLowerCase()
-  return getHelpContent(`workflowNode.${type}`)
+  if (!nodeType) {
+    return null
+  }
+  
+  const type = nodeType.toLowerCase()
+  const content = getHelpContent(`workflowNode.${type}`)
+  
+  // Return null for unknown types (when content lookup fails)
+  // This prevents showing tooltips for custom/user-defined node types
+  return content
 }
 
 /**