feat: user registration and chat messaging (wip)

client/src/contexts/ChatContext.tsx

@@ -0,0 +1,17 @@
+import { createContext, useContext } from "react";
+import { ChatMessage, User } from "../../../shared";
+
+interface ChatContextType {
+  messages: ChatMessage[];
+  currentUser: User | null;
+  addMessage: (message: ChatMessage) => void;
+  setCurrentUser: (user: User) => void;
+}
+
+export const ChatContext = createContext<ChatContextType | null>(null);
+
+export const useChatState = () => {
+  const context = useContext(ChatContext);
+  if (!context) throw new Error("useChat must be used within ChatProvider");
+  return context;
+};