chore: update check for parsing error

Author: kevinkim-ogp

packages/backend/src/apps/toolbox/actions/for-each/index.ts

@@ -29,7 +29,7 @@ const action: IRawAction = {
     const { items: rawItems } = $.step.parameters
     const parsedResult = inputSchema.safeParse(rawItems)
 
-    if (!parsedResult.success) {
+    if (parsedResult.success === false) {
       throw new StepError(
         'Invalid input list',
         'Select a valid input list',

packages/backend/src/apps/toolbox/actions/for-each/schema.ts

@@ -60,18 +60,8 @@ export const inputSchema = z
     }
 
     // Handle checkbox input (comma-separated values)
-    const items = trimmed.split(',')
-
-    if (items.length === 0) {
-      ctx.addIssue({
-        code: z.ZodIssueCode.custom,
-        message: 'No valid items found in comma-separated input',
-      })
-      return z.NEVER
-    }
-
     return {
       type: 'checkbox' as const,
-      items,
+      items: trimmed.split(','),
     }
   })