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/notifications/page.tsx

@@ -8,7 +8,7 @@ import { notificationPath, notificationText, timeAgo, type NotificationListDTO }
 import { Avatar } from '@/components/Avatar';
 import { client, useMe } from '@/lib/api';
 
-/** Reactions, new followers and songs sent to you, newest first. Opening it marks them read. */
+/** Reactions, comments, new followers and songs sent to you, newest first. Opening it marks them read. */
 export default function NotificationsPage() {
   const { me, loggedOut } = useMe();
   const { mutate } = useSWRConfig();