♻️ fix: Correct Message ID Assignment Logic (#8439)

* fix: Add `isRegenerate` flag to chat payload to avoid saving temporary response IDs

* fix: Remove unused `isResubmission` flag

* ci: Add tests for responseMessageId regeneration logic in BaseClient

client/src/components/Chat/Messages/Content/EditMessage.tsx

@@ -60,7 +60,6 @@ const EditMessage = ({
           conversationId,
         },
         {
-          isResubmission: true,
           overrideFiles: message.files,
         },
       );