fix(apify): guard undefined dataset id and forward explicit offset=0

Author: waleedlatif1

apps/sim/blocks/blocks/apify.ts

@@ -202,7 +202,8 @@ Return ONLY the valid JSON object - no explanations, no markdown.`,
         if (rest.timeout) result.timeout = Number(rest.timeout)
         if (rest.waitForFinish) result.waitForFinish = Number(rest.waitForFinish)
         if (rest.itemLimit) result.itemLimit = Number(rest.itemLimit)
-        if (rest.offset) result.offset = Number(rest.offset)
+        if (rest.offset !== undefined && rest.offset !== null && rest.offset !== '')
+          result.offset = Number(rest.offset)
 
         return result
       },

apps/sim/tools/apify/get_dataset_items.ts

@@ -51,7 +51,7 @@ export const apifyGetDatasetItemsTool: ToolConfig<GetDatasetItemsParams, GetData
         const limit = Math.max(1, Math.min(params.itemLimit, 250000))
         queryParams.set('limit', limit.toString())
       }
-      if (params.offset) {
+      if (params.offset != null) {
         queryParams.set('offset', params.offset.toString())
       }
       if (params.fields) {

apps/sim/tools/apify/run_actor_async.ts

@@ -168,7 +168,7 @@ export const apifyRunActorAsyncTool: ToolConfig<RunActorParams, RunActorResult>
         run.status === 'ABORTED' ||
         run.status === 'TIMED-OUT'
       ) {
-        if (run.status === 'SUCCEEDED') {
+        if (run.status === 'SUCCEEDED' && run.defaultDatasetId) {
           const limit = Math.max(1, Math.min(params.itemLimit || 100, 250000))
           const itemsResponse = await fetch(
             `https://api.apify.com/v2/datasets/${run.defaultDatasetId}/items?limit=${limit}`,