The instant replay: a chronicle line's eye relives the turn, firsthand

The dream feature lands, behind a preference that ships off for now.
The chronicle's lines grow structure — each knows its turn, counted by
the same boundary events on both ends of the wire (the server counts
the deal's own events too, or every number would sit one turn behind).
The first notable line of a turn — combat, spectacle, a targeted cast
— wears a small eye; clicking it asks the server for that one turn's
steps, rebuilt and redacted like any reel, and the replay opens
STRAIGHT into first person through the eyes of the wizard whose turn
it was: their position, the viewer's knowledge, nothing private leaked.
It plays that turn and stops. Save-video and the board toggle come
along for free.

Two camera bugs die with it: the replay tween effect tracked its own
writes, restarting the ease every frame until walks decayed into the
slow wall-piercing drift Eric saw — untracked reads run one tween per
step now. And the reel camera follows whichever eyes the reel wears,
not always your own.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/server/src/index.ts

@@ -35,6 +35,7 @@ import { WebSocketServer, WebSocket } from "ws";
 import type { Command, PlayerId } from "@wizwar/engine";
 import {
   catchUpSteps,
+  momentSteps,
   claimTransferCode,
   createRoom,
   pickColor,
@@ -507,6 +508,20 @@ wss.on("connection", (socket) => {
           send(socket, { type: "catchUp", steps });
           break;
         }
+        case "moment": {
+          // A chronicle line's instant-replay eye: one turn's reel.
+          const room = session.roomId ? getRoom(session.roomId) : undefined;
+          if (!room || !session.playerId) return send(socket, { type: "error", message: "not in a room" });
+          const now = Date.now();
+          if (now - session.lastCatchUpAt < CATCHUP_COOLDOWN_MS) {
+            return send(socket, { type: "error", message: "catching up already — one moment" });
+          }
+          session.lastCatchUpAt = now;
+          const steps = momentSteps(room, session.playerId, Number(msg.turn ?? -1));
+          if ("error" in steps) return send(socket, { type: "error", message: steps.error });
+          send(socket, { type: "moment", steps });
+          break;
+        }
         case "pickColor": {
           const room = session.roomId ? getRoom(session.roomId) : undefined;
           if (!room || !session.playerId) return send(socket, { type: "error", message: "not in a room" });