implement all TODO taks

src/main/java/chat/ChatClient.java

@@ -37,19 +37,29 @@ public class ChatClient {
     }
 
     private void connectToServer() throws IOException {
-        // TODO: create socket connection to host:port
-        // TODO: initialize output stream (PrintWriter)
-        // TODO: initialize input stream (BufferedReader)
+
+        socket = new Socket(host, port);
+        out = new PrintWriter(socket.getOutputStream(), true);
+        in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
     }
 
     private void readUserInputAndSend() throws IOException {
-        // TODO: read continuously from console
-        // TODO: send each input line to server
+
+        String line;
+        while((line = consoleReader.readLine()) != null) {
+            out.println(line);
+        }
     }
 
     private void cleanup() {
-        // TODO: close socket safely
-        // TODO: release resources
+
+        try {
+            if (socket != null && !socket.isClosed()) {
+                socket.close();
+            }
+        } catch (IOException e) {
+            System.err.println("Error closing socket: " + e.getMessage());
+        }
     }
 
     public static void main(String[] args) {