feat: user registration and chat messaging (wip)

client/src/components/ChatInput.tsx

@@ -0,0 +1,36 @@
+import React, { useState } from "react";
+
+interface ChatInputProps {
+  onSendMessage: (content: string) => void;
+}
+
+function ChatInput({ onSendMessage }: ChatInputProps) {
+  const [message, setMessage] = useState("");
+
+  function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    if (!message.trim()) return;
+
+    onSendMessage(message);
+    setMessage("");
+  }
+
+  return (
+    <form onSubmit={handleSubmit} className="mt-4">
+      <div className="flex gap-2">
+        <input
+          type="text"
+          value={message}
+          onChange={(e) => setMessage(e.target.value)}
+          placeholder="Type a message..."
+          className="flex-1 px-3 py-2 border border-gray-300 rounded-md shadow-sm placeholder-gray-400 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
+        />
+        <button type="submit" disabled={!message.trim()} className="btn">
+          Send
+        </button>
+      </div>
+    </form>
+  );
+}
+
+export default React.memo(ChatInput);