feat: enhance terminal input handling and improve WebSocket connection safety

Frontend/src/components/CodeChallenge.jsx

@@ -175,21 +175,22 @@ const CodeChallenge = () => {
   const handleTerminalInput = (e) => {
     e.preventDefault();
     
-    if (!terminalInput.trim()) {
-      return;
-    }
+    // Allow empty input to be sent (user might press Enter on purpose)
+    // But display it properly
+    const inputValue = terminalInput;
 
     // Display the input in terminal
     setTerminalOutput(prev => [
       ...prev,
-      { type: 'input', content: terminalInput }
+      { type: 'input', content: inputValue || '(empty)' }
     ]);
 
     // If socket is available, send input to backend
+    // Note: backend will add the newline, so we don't add it here
     if (activeSocket && activeSocket.readyState === WebSocket.OPEN) {
       activeSocket.send(JSON.stringify({
         type: 'input',
-        content: terminalInput + '\n'
+        content: inputValue
       }));
     }
 
@@ -471,17 +472,13 @@ const CodeChallenge = () => {
         // Submit code to the backend
         const apiUrl = import.meta.env.VITE_API_URL || 'http://localhost:8080';
         
-        // Ensure code has actual newlines, not escaped \n strings
-        // This handles cases where code might have literal "\n" instead of newlines
-        const processedCode = code.replace(/\\n/g, '\n').replace(/\\t/g, '\t');
-        
         const response = await fetch(`${apiUrl}/api/submit`, {
           method: 'POST',
           headers: {
             'Content-Type': 'application/json',
           },
           body: JSON.stringify({
-            code: processedCode,
+            code: code,
             language: getLanguageIdentifier(language),
             input: '',
           }),
@@ -971,6 +968,13 @@ const CodeChallenge = () => {
                       minimap: { enabled: false },
                       scrollBeyondLastLine: false,
                       automaticLayout: true,
+                      wordWrap: 'off',
+                      wrappingIndent: 'none',
+                      formatOnPaste: false,
+                      formatOnType: false,
+                      acceptSuggestionOnEnter: 'off',
+                      quickSuggestions: false,
+                      suggestOnTriggerCharacters: false,
                     }}
                   />
                 </div>