remove example problem data and related starter code handling from CodeChallenge component

Frontend/src/components/CodeChallenge.jsx

@@ -184,84 +184,6 @@ const CodeChallenge = () => {
     setTerminalInput('');
   };
 
-  // Example problem data
-  const problems = {
-    "Q.1": {
-      id: "two-sum",
-      title: "Two Sum",
-      description: "Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.",
-      constraints: "You may assume that each input would have exactly one solution, and you may not use the same element twice.",
-      examples: [
-        {
-          input: "nums = [2,7,11,15], target = 9",
-          output: "[0,1]",
-          explanation: "Because nums[0] + nums[1] == 9, we return [0, 1]."
-        },
-        {
-          input: "nums = [3,2,4], target = 6",
-          output: "[1,2]"
-        },
-        {
-          input: "nums = [3,3], target = 6",
-          output: "[0,1]"
-        }
-      ],
-      starterCode: ``
-    },
-    "Q.2": {
-      id: "palindrome-number",
-      title: "Palindrome Number",
-      description: "Given an integer x, return true if x is a palindrome, and false otherwise.",
-      examples: [
-        {
-          input: "x = 121",
-          output: "true"
-        },
-        {
-          input: "x = -121",
-          output: "false",
-          explanation: "From left to right, it reads -121. From right to left, it reads 121-. Therefore it is not a palindrome."
-        }
-      ],
-      starterCode: ``
-    },
-    "Q.3": {
-      id: "valid-parentheses",
-      title: "Valid Parentheses",
-      description: "Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.",
-      constraints: "An input string is valid if: Open brackets must be closed by the same type of brackets. Open brackets must be closed in the correct order.",
-      examples: [
-        {
-          input: 's = "()"',
-          output: "true"
-        },
-        {
-          input: 's = "()[]{}"',
-          output: "true"
-        },
-        {
-          input: 's = "(]"',
-          output: "false"
-        }
-      ],
-      starterCode: ``
-    }
-  };
-
-  // Get appropriate starter code based on language
-  const getStarterCode = (problem, lang) => {
-    // Language-specific starter code templates
-    const templates = {
-      'JavaScript': problem.starterCode,
-      'C': ``,
-      'Python': ``,
-      'Java': ``,
-      'C++': ``
-    };
-    
-    return templates[lang] || problem.starterCode;
-  };
-
   // Set initial code based on active problem
   useEffect(() => {
     const currentQuestion = getCurrentQuestion();
@@ -286,10 +208,6 @@ const CodeChallenge = () => {
         setCode(currentQuestion.code_template || getDefaultTemplate(currentQuestion.programming_language || 'JavaScript'));
         setTerminalOutput([]);
       }
-    } else if (problems[activeQuestion]) {
-      // Fallback to example problems if no real test data
-      setCode(getStarterCode(problems[activeQuestion], language));
-      setTerminalOutput([]);
     }
   }, [activeQuestion]);
   
@@ -533,7 +451,7 @@ const CodeChallenge = () => {
       setIsRunning(true);
       const currentQuestion = getCurrentQuestion();
       setTerminalOutput([
-        { type: 'system', content: `Running ${currentQuestion?.title || problems[activeQuestion]?.id || 'code'}...` }
+        { type: 'system', content: `Running ${currentQuestion?.question_text || currentQuestion?.title || 'code'}...` }
       ]);
       
       try {
@@ -578,7 +496,7 @@ const CodeChallenge = () => {
     setIsRunning(true);
     const currentQuestion = getCurrentQuestion();
     setTerminalOutput([
-      { type: 'system', content: `Submitting solution for ${currentQuestion?.title || problems[activeQuestion]?.id || 'problem'}...` }
+      { type: 'system', content: `Submitting solution for ${currentQuestion?.question_text || currentQuestion?.title || 'problem'}...` }
     ]);
     
     try {
@@ -805,18 +723,12 @@ const CodeChallenge = () => {
       );
     }
     
-    // Fallback to example problems
+    // No question data available
-    const problem = problems[activeQuestion];
-    if (!problem) return null;
-
     return (
       <div className="problem-container">
         <div className="problem-description">
-          <p>{problem.description}</p>
+          <p>No question data available. Please ensure a test is selected.</p>
-          {problem.constraints && <p>{problem.constraints}</p>}
         </div>
-        
-        {/* Test cases section removed */}
       </div>
     );
   };