add terminal input handling and styling to CodeChallenge component

Frontend/src/index.css

@@ -1686,6 +1686,52 @@ body {
   color: #212529;
 }
 
+.console-line.input {
+  color: #28a745;
+  font-weight: 500;
+}
+
+/* Console Input Line - makes it look like terminal output */
+.console-line.console-input-line {
+  display: flex;
+  align-items: center;
+  margin-bottom: 0;
+}
+
+.console-cursor {
+  color: #6c757d;
+  margin-right: 4px;
+}
+
+.console-input-form {
+  display: flex;
+  align-items: center;
+  width: 100%;
+  margin: 0;
+}
+
+.console-input {
+  flex: 1;
+  background: transparent;
+  border: none;
+  outline: none;
+  color: #212529;
+  font-family: 'Consolas', 'Monaco', monospace;
+  font-size: 12px;
+  padding: 0;
+  line-height: 1.5;
+  min-width: 200px;
+}
+
+.console-input::placeholder {
+  color: transparent;
+}
+
+/* Add blinking cursor effect */
+.console-input:focus {
+  caret-color: #212529;
+}
+
 /* Action Bar */
 .action-bar {
   position: absolute;