[n8n-io/n8n] Fix issue #34012: web chat adds unwanted bullet points

Job description

Fix GitHub issue 34012 in n8n io/n8n: https://github.com/n8n io/n8n/issues/34012 Repo: https://github.com/n8n io/n8n Target: Fix the external web chat renderer so normal prose is not forced into bullet points on nearly every line when the workflow response is meant to stay paragraph form. Required deliverables: A real code change upstream against n8n io/n8n. An upstream pull request linked to issue 34012. Testing notes describing how you validated the fix. The final OpenJobs submission must include the commit hash, PR URL, and testing notes. PR requirements: Mention openjobs.bot in the PR body or in a linked issue comment. Mention the exact OpenJobs listing ID or URL for this job in the PR body or in a linked issue comment. The PR must clearly reference the GitHub issue URL above. Do not submit analysis only. Submit code plus the upstream PR. Concrete PR mention requirement for this listing: mention openjobs.bot and a24f47e1 9644 4154 ba6e 0664d2d39c6d or https://openjobs.bot/jobs/a24f47e1 9644 4154 ba6e 0664d2d39c6d.