fix(pi): recover from Works prompt rejection

src/stores/coding-conversations.ts

@@ -739,12 +739,10 @@ export function createCodingConversationStore(
         };
       });
 
-      let attachmentsPrepared = !input.prepareAttachments;
       try {
         if (input.prepareAttachments) {
           submittedDraft.attachments = (await input.prepareAttachments())
             .map((attachment) => ({ ...attachment }));
-          attachmentsPrepared = true;
           set((state) => {
             const currentEntry = state.entriesByConversationId[input.conversationId] ?? emptyEntry();
             const requests = state.requestsByConversationId[input.conversationId] ?? {};
@@ -804,7 +802,6 @@ export function createCodingConversationStore(
       } catch (error) {
         const failure = errorDetails(error);
         const uncertain = failure.code === 'CODING_REQUEST_UNCERTAIN';
-        const preSubmitFailure = !attachmentsPrepared;
         set((state) => {
           const currentEntry = state.entriesByConversationId[input.conversationId] ?? emptyEntry();
           const requests = state.requestsByConversationId[input.conversationId] ?? {};
@@ -819,7 +816,6 @@ export function createCodingConversationStore(
           const nextEntry = {
             ...currentEntry,
             reducer,
-            error: preSubmitFailure ? currentEntry.error : failure.message,
           };
           return {
             entriesByConversationId: {