@@ -795,6 +795,13 @@ const WorkflowContent = React.memo(() => {
         event.preventDefault()
         redo()
       } else if ((event.ctrlKey || event.metaKey) && event.key === 'c') {
+        const selection = window.getSelection()
+        const hasTextSelection = selection && selection.toString().length > 0
+
+        if (hasTextSelection) {
+          return
+        }
+
         const selectedNodes = getNodes().filter((node) => node.selected)
         if (selectedNodes.length > 0) {
           event.preventDefault()
 
@@ -90,6 +90,17 @@ export const functionExecuteTool: ToolConfig<CodeExecutionInput, CodeExecutionOu
   transformResponse: async (response: Response): Promise<CodeExecutionOutput> => {
     const result = await response.json()
 
+    if (!result.success) {
+      return {
+        success: false,
+        output: {
+          result: null,
+          stdout: result.output?.stdout || '',
+        },
+        error: result.error,
+      }
+    }
+
     return {
       success: true,
       output: {