feat: enhance chat UI with badges, superchat and membership display

shared/chat.ts

@@ -1,6 +1,25 @@
+export type Badge = {
+  type: 'moderator' | 'member' | 'verified' | 'custom';
+  label?: string;
+  icon?: string;
+};
+
+export type SuperChatInfo = {
+  amount: string;
+  currency: string;
+  color: string;
+};
+
 export type ChatMessage = {
   id: string;
   author: string;
+  authorPhoto?: string;
   text: string;
   publishedAt: string;
+  badges?: Badge[];
+  isModerator?: boolean;
+  isMember?: boolean;
+  isVerified?: boolean;
+  superChat?: SuperChatInfo;
+  membershipGift?: boolean;
 };