Fix test output for speed limit and streamline traffic marking in iptables

lib/test_scripts/test_api.dart

@@ -79,7 +79,7 @@ class ApiTester {
       print('   IP: $peerIP');
 
       // Test 2: Set speed limit
-e      print('\n📋 TEST 2: Set speed limit (62500 bytes/s = 500 kbps)');
+      print('\n📋 TEST 2: Set speed limit (62500 bytes/s = 500 kbps)');
       final speedResponse = await makeRequest('POST', '/api/peers/speed-limit', {
         'publicKey': publicKey,
         'bytesPerSecond': 62500, // 500 kbps = 500000 bits/s = 62500 bytes/s