fix: refine answer display in purpose practice

src/components/practice/ProficientInputArea.tsx

@@ -10,6 +10,7 @@ interface ProficientInputAreaProps {
   onChange: (value: string) => void
   onCompositionStart: () => void
   onCompositionEnd: (value: string) => void
+  showLockedHint?: boolean
 }
 
 export function ProficientInputArea({
@@ -20,6 +21,7 @@ export function ProficientInputArea({
   onChange,
   onCompositionStart,
   onCompositionEnd,
+  showLockedHint = true,
 }: ProficientInputAreaProps) {
   const inputRef = useRef<HTMLInputElement | null>(null)
 
@@ -55,7 +57,7 @@ export function ProficientInputArea({
       />
 
       <AnimatePresence>
-        {inputLocked && (
+        {showLockedHint && inputLocked && (
           <motion.div
             initial={{ opacity: 0, y: -6 }}
             animate={{ opacity: 1, y: 0 }}