Comments on plays

- Anyone who can see a play can read its comments; the player and the people they follow can write.
  The author, the player and admins can delete; comments can be reported (admins see the text).
- Notifications: "commented on" for the player, "replied on" for earlier commenters, each with its
  own setting. Reaction and comment notifications now open the play.
- A 💬 chip with the count next to reactions on the feed and recent plays, opening the thread on
  the app (/play/[id]) and the website. Threads refresh every few seconds while open.
- Blocking removes comments between the two people. Plays with comments survive history trimming.
- Privacy page updated.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011Y2iUsKEWDuRGjK5FPmcUP

apps/web/src/app/admin/page.tsx

@@ -71,6 +71,11 @@ export default function AdminPage() {
                 <strong>{REPORT_REASON_LABELS[r.reason as ReportReason] ?? r.reason}</strong>
                 {r.reporter && <span className="muted"> · reported by @{r.reporter.username}</span>}
               </p>
+              {r.comment && (
+                <p className="muted small">
+                  Their comment{r.comment.id ? '' : ' (since deleted)'}: <q>{r.comment.body}</q>
+                </p>
+              )}
               {r.note && <blockquote>{r.note}</blockquote>}
               <div className="row">
                 {r.status === 'open' && (