Edit your own comments

Right now once you post a comment, you're stuck with it — typos, wrong link, half a sentence. You can delete and repost, but that loses the thread and any reactions.

Let comment authors edit their own comments, with an "edited" marker so the history stays honest. Suggested rules:

• Authors can edit until a team member replies (to prevent rewriting context after an official response)
• Team members can edit any comment
• Edit history is recorded