fix: remove FRAGE/SATZ/ANTWORT/VOKABELN section labels from all cards

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/PairWordCard.jsx

@@ -140,7 +140,7 @@ export default function PairWordCard({ card, onComplete }) {
       </div>
 
       <div className="pair-card-body" onClick={e => e.stopPropagation()} style={{ paddingTop: 18 }}>
-        <p className="pair-section-label">Frage</p>
+
         <p className="pair-question">
           {resolveSentence(sentence, card.placeholders, handleChipClick, activeChip?.id)}
         </p>
@@ -150,7 +150,7 @@ export default function PairWordCard({ card, onComplete }) {
           </p>
         )}
 
-        <p className="pair-section-label" style={{ marginTop: 14 }}>Antwort</p>
+
         <div className="pair-options">
           {options.map((opt) => {
             const label = opt[lang] || opt.de || '…'