feat(journal): allow players to emit roll messages

src/components/journal/types/roll.tsx

@@ -1,9 +1,9 @@
 /**
  * Built-in message type: roll
  *
- * Emitters: gm
+ * Emitters: gm, player
  * Command: /roll formula
- * The GM's browser rolls the formula and publishes the resolved result.
+ * The sender's browser rolls the formula and publishes the resolved result.
  */
 
 import { z } from "zod";
@@ -44,7 +44,7 @@ export function resolveRollPayload(raw: {
 registerMessageType<RollPayload>({
   type: "roll",
   label: "掷骰",
-  emitters: ["gm"],
+  emitters: ["gm", "player"],
   schema,
   defaultPayload: () => ({
     notation: "1d20",