Add private chat to multiplayer rooms

shared/multiplayer.ts

@@ -9,6 +9,28 @@ export const createRoomSchema = z.object({
   playerLimit: z.number().int().min(2).max(16),
 });
 export const joinRoomSchema = z.object({ displayName: displayNameSchema });
+export const chatMessageSchema = z.object({
+  clientId: z.string().uuid(),
+  text: z
+    .string()
+    .trim()
+    .min(1)
+    .max(500)
+    .refine(
+      (text) =>
+        !/[\u0000-\u001f\u007f-\u009f\u202a-\u202e\u2066-\u2069]/u.test(text),
+      "Messages cannot contain hidden controls",
+    ),
+});
+export type RoomChat = {
+  messages: {
+    id: string;
+    playerId: string;
+    name: string;
+    text: string;
+    createdAt: string;
+  }[];
+};
 export const roomRoundSchema = z.object({
   round: z.number().int().min(0).max(4),
 });