refactor: PairForm — single type dropdown, 4 variants, carry-over behavior

- answer_type is now a single value (text/yes_no/question/word)
- Dropdown replaces checkboxes, per-type field sections
- Text: only positive statement
- Yes/No: optional question + answer picker
- Question: question* + positive* + optional negative
- Word: optional question + word pickers
- After save: texts/words carry over, type resets for next pair
- Fix: closed missing div in PairsPanel scroll container

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

src/pages/StatementCreation.jsx

@@ -156,16 +156,22 @@ function WordTag({ word, onRemove }) {
 }
 
 // ─── PairForm ─────────────────────────────────────────────────────────────────
+const PAIR_TYPES = [
+  { value: 'text',     label: 'Text',      hint: 'Nur positives Statement' },
+  { value: 'yes_no',   label: 'Ja / Nein', hint: 'Frage + Ja/Nein Antwort' },
+  { value: 'question', label: 'Frage',     hint: 'Frage + Positiv + Negativ' },
+  { value: 'word',     label: 'Wort',      hint: 'Frage + Positive/Negative Wörter' },
+];
+
 function PairForm({ objectId, onPairSaved }) {
   const lang = getUserLang();
   const [showForm, setShowForm] = useState(false);
+  const [savedFlash, setSavedFlash] = useState(false);
 
-  // Type checkboxes
-  const [typeText, setTypeText] = useState(false);
-  const [typeYesNo, setTypeYesNo] = useState(false);
-  const [typeWord, setTypeWord] = useState(false);
+  // Single type dropdown
+  const [type, setType] = useState('');
 
-  // Text fields
+  // Text fields — carried over between saves
   const [question, setQuestion] = useState('');
   const [positive, setPositive] = useState('');
   const [negative, setNegative] = useState('');
@@ -174,16 +180,17 @@ function PairForm({ objectId, onPairSaved }) {
   const [creatingWord, setCreatingWord] = useState(false);
 
   // Yes/No answer
-  const [yesNoAnswer, setYesNoAnswer] = useState(null); // null | true | false
+  const [yesNoAnswer, setYesNoAnswer] = useState(null);
 
-  // Word pickers
+  // Word pickers — carried over between saves
   const [positiveWords, setPositiveWords] = useState([]);
   const [negativeWords, setNegativeWords] = useState([]);
 
   const [saving, setSaving] = useState(false);
 
-  // Auto-detect words from text fields (only when Text type active)
-  const allText = typeText ? `${question} ${positive} ${negative}` : '';
+  // Auto-detect words in sentence fields
+  const needsWordDetection = type === 'text' || type === 'question';
+  const allText = needsWordDetection ? `${question} ${positive} ${negative}` : '';
   useEffect(() => {
     if (!allText.trim()) { setWordMap({}); return; }
     const t = setTimeout(async () => {
@@ -212,40 +219,32 @@ function PairForm({ objectId, onPairSaved }) {
     finally { setCreatingWord(false); }
   }
 
-  // Validation
-  const atLeastOne = typeText || typeYesNo || typeWord;
-  const textOk = !typeText || positive.trim().length > 0;
-  const negativeOk = !negative.trim() || (question.trim().length > 0 && positive.trim().length > 0);
-  const canSave = atLeastOne && textOk && negativeOk;
+  function canSave() {
+    if (!type) return false;
+    if (type === 'text')     return positive.trim().length > 0;
+    if (type === 'yes_no')   return true;
+    if (type === 'question') return question.trim().length > 0 && positive.trim().length > 0;
+    if (type === 'word')     return positiveWords.length > 0 || negativeWords.length > 0;
+    return false;
+  }
 
   function validationHint() {
-    if (!atLeastOne) return 'Wähle mindestens einen Typ (Text / Ja·Nein / Wort).';
-    if (!textOk) return 'Text: Positive Aussage ist Pflicht.';
-    if (!negativeOk) return 'Negative Aussage erfordert Frage + Positive Aussage.';
+    if (!type) return 'Bitte einen Typ wählen.';
+    if (type === 'text'     && !positive.trim())  return 'Statement ist Pflicht.';
+    if (type === 'question' && !question.trim())  return 'Frage ist Pflicht.';
+    if (type === 'question' && !positive.trim())  return 'Positive Aussage ist Pflicht.';
+    if (type === 'word'     && !positiveWords.length && !negativeWords.length)
+      return 'Mindestens ein Wort erforderlich.';
     return '';
   }
 
-  function reset() {
-    setTypeText(false); setTypeYesNo(false); setTypeWord(false);
-    setQuestion(''); setPositive(''); setNegative('');
-    setWordMap({}); setYesNoAnswer(null);
-    setPositiveWords([]); setNegativeWords([]);
-    setShowForm(false);
-  }
-
   async function handleSave() {
-    if (!canSave) return;
+    if (!canSave()) return;
     setSaving(true);
     try {
-      const answerTypes = [
-        ...(typeText   ? ['text']   : []),
-        ...(typeYesNo  ? ['yes_no'] : []),
-        ...(typeWord   ? ['word']   : []),
-      ];
-
-      // Question (only if Text + question text filled)
+      // Question record — for yes_no, question, word (if text filled)
       let questionId = null;
-      if (typeText && question.trim()) {
+      if (type !== 'text' && question.trim()) {
         const q = await apiPost('/questions', {
           [`sentence_${lang}`]: withPlaceholders(question, wordMap),
           status: 'draft',
@@ -254,87 +253,97 @@ function PairForm({ objectId, onPairSaved }) {
       }
 
       // Positive statement
-      const posBody = { status: 'draft' };
-      if (typeText && positive.trim())
-        posBody[`positive_sentence_${lang}`] = withPlaceholders(positive, wordMap);
-      if (typeYesNo && yesNoAnswer !== null)
-        posBody.answer = yesNoAnswer;
-
-      const posStmt = await apiPost('/statements', posBody);
-
-      // Link positive words to positive statement
-      if (typeWord && positiveWords.length)
-        await Promise.all(positiveWords.map(w => apiLink(`/statements/${posStmt.id}/positive-words/${w.id}`)));
-
-      // Negative statement (Text + negative text, OR Word + negativeWords)
-      let negStmtId = null;
-      const hasNegText = typeText && negative.trim();
-      const hasNegWords = typeWord && negativeWords.length > 0;
-
-      if (hasNegText || hasNegWords) {
-        const negBody = { status: 'draft' };
-        if (hasNegText)
-          negBody[`negative_sentence_${lang}`] = withPlaceholders(negative, wordMap);
-        const negStmt = await apiPost('/statements', negBody);
-        negStmtId = negStmt.id;
-        if (hasNegWords)
-          await Promise.all(negativeWords.map(w => apiLink(`/statements/${negStmt.id}/negative-words/${w.id}`)));
+      let posStmtId = null;
+      if (type === 'text' || type === 'question') {
+        const posBody = { status: 'draft' };
+        if (positive.trim())
+          posBody[`positive_sentence_${lang}`] = withPlaceholders(positive, wordMap);
+        const s = await apiPost('/statements', posBody);
+        posStmtId = s.id;
+      } else if (type === 'yes_no') {
+        const posBody = { status: 'draft' };
+        if (yesNoAnswer !== null) posBody.answer = yesNoAnswer;
+        const s = await apiPost('/statements', posBody);
+        posStmtId = s.id;
+      } else if (type === 'word' && positiveWords.length) {
+        const s = await apiPost('/statements', { status: 'draft' });
+        posStmtId = s.id;
+        await Promise.all(positiveWords.map(w => apiLink(`/statements/${posStmtId}/positive-words/${w.id}`)));
       }
 
-      // Pair
+      // Negative statement
+      let negStmtId = null;
+      if (type === 'question' && negative.trim()) {
+        const negBody = { status: 'draft', [`negative_sentence_${lang}`]: withPlaceholders(negative, wordMap) };
+        const s = await apiPost('/statements', negBody);
+        negStmtId = s.id;
+      } else if (type === 'word' && negativeWords.length) {
+        const s = await apiPost('/statements', { status: 'draft' });
+        negStmtId = s.id;
+        await Promise.all(negativeWords.map(w => apiLink(`/statements/${negStmtId}/negative-words/${w.id}`)));
+      }
+
+      // Create pair
       const pair = await apiPost('/pairs', {
-        answer_type: answerTypes,
+        answer_type: type,
         question_id: questionId,
-        positive_statement_id: posStmt.id,
+        positive_statement_id: posStmtId,
         negative_statement_id: negStmtId,
         status: 'draft',
       });
 
       await apiLink(`/objects/${objectId}/pairs/${pair.id}`);
 
-      reset();
-      onPairSaved({ ...pair, question: questionId ? { [`sentence_${lang}`]: question } : null,
-        positive_statement: posStmt, negative_statement: null });
+      // Carry-over: keep all text/word values, only reset type to prompt re-selection
+      setType('');
+      setYesNoAnswer(null);
+      setSavedFlash(true);
+      setTimeout(() => setSavedFlash(false), 2000);
+      onPairSaved(pair);
     } catch (e) { alert('Fehler: ' + e.message); }
     finally { setSaving(false); }
   }
 
   return (
     <div className="space-y-2">
-      {/* Toggle button */}
       <button
         onClick={() => setShowForm(s => !s)}
         className="w-full py-1.5 text-xs font-medium rounded-lg bg-indigo-600 hover:bg-indigo-700 text-white transition-colors"
       >
-        {showForm ? '✕ Abbrechen' : '+ Add new pair'}
+        {showForm ? '✕ Abbrechen' : '+ Pair hinzufügen'}
       </button>
 
       {showForm && (
         <div className="border border-indigo-100 rounded-xl p-3 bg-indigo-50/30 space-y-3">
 
-          {/* ── Type checkboxes ── */}
-          <div className="flex items-center gap-4">
-            {[['typeText', typeText, setTypeText, 'Text'],
-              ['typeYesNo', typeYesNo, setTypeYesNo, 'Ja / Nein'],
-              ['typeWord', typeWord, setTypeWord, 'Wort'],
-            ].map(([key, val, setter, label]) => (
-              <label key={key} className="flex items-center gap-1.5 text-xs font-medium text-slate-700 cursor-pointer select-none">
-                <input
-                  type="checkbox"
-                  checked={val}
-                  onChange={e => setter(e.target.checked)}
-                  className="w-3.5 h-3.5 accent-indigo-600"
-                />
-                {label}
-              </label>
-            ))}
+          {/* ── Saved flash ── */}
+          {savedFlash && (
+            <div className="text-xs text-green-700 bg-green-50 border border-green-200 rounded-lg px-3 py-1.5 font-medium">
+              ✓ Pair gespeichert — Texte übernommen
+            </div>
+          )}
+
+          {/* ── Type dropdown ── */}
+          <div>
+            <label className="block text-xs font-semibold text-slate-500 uppercase tracking-wide mb-1">Typ</label>
+            <select
+              value={type}
+              onChange={e => setType(e.target.value)}
+              className="w-full border border-slate-300 rounded-lg px-2.5 py-1.5 text-xs focus:outline-none focus:ring-2 focus:ring-indigo-400 bg-white"
+            >
+              <option value="">— Typ wählen —</option>
+              {PAIR_TYPES.map(opt => (
+                <option key={opt.value} value={opt.value}>{opt.label} — {opt.hint}</option>
+              ))}
+            </select>
           </div>
 
-          {/* ── Text section ── */}
-          {typeText && (
+          {/* ── Per-type fields ── */}
+          {type && (
             <div className="space-y-2.5 pt-1 border-t border-indigo-100">
-              {/* "Als Wort erstellen" banner */}
-              {selection && (
+
+              {/* Word creation banner (text/question) */}
+              {(type === 'text' || type === 'question') && selection && (
                 <div className="flex items-center gap-2 bg-white border border-indigo-200 rounded-lg px-2.5 py-1.5">
                   <span className="text-xs text-slate-600 flex-1 truncate">
                     „<strong className="text-indigo-700">{selection}</strong>"
@@ -346,35 +355,115 @@ function PairForm({ objectId, onPairSaved }) {
                 </div>
               )}
 
-              <div>
-                <label className="block text-xs font-semibold text-slate-500 uppercase tracking-wide mb-1">
-                  Positive Aussage <span className="text-red-400">*</span>
-                </label>
-                <HighlightedTextarea value={positive} onChange={setPositive} wordMap={wordMap}
-                  rows={2} placeholder="Das ist ein Hund." onSelectionChange={setSelection} />
-              </div>
+              {/* TEXT — only positive statement */}
+              {type === 'text' && (
+                <div>
+                  <label className="block text-xs font-semibold text-slate-500 uppercase tracking-wide mb-1">
+                    Statement <span className="text-red-400">*</span>
+                  </label>
+                  <HighlightedTextarea value={positive} onChange={setPositive} wordMap={wordMap}
+                    rows={2} placeholder="Das ist ein Hund." onSelectionChange={setSelection} />
+                </div>
+              )}
 
-              <div>
-                <label className="block text-xs font-semibold text-slate-500 uppercase tracking-wide mb-1">
-                  Frage <span className="text-slate-300">(optional)</span>
-                </label>
-                <HighlightedTextarea value={question} onChange={setQuestion} wordMap={wordMap}
-                  rows={2} placeholder="Was ist das?" onSelectionChange={setSelection} />
-              </div>
+              {/* YES_NO — question + answer picker */}
+              {type === 'yes_no' && (
+                <>
+                  <div>
+                    <label className="block text-xs font-semibold text-slate-500 uppercase tracking-wide mb-1">
+                      Frage <span className="text-slate-400 font-normal normal-case">(optional)</span>
+                    </label>
+                    <HighlightedTextarea value={question} onChange={setQuestion} wordMap={wordMap}
+                      rows={2} placeholder="Ist das ein Hund?" onSelectionChange={setSelection} />
+                  </div>
+                  <div>
+                    <p className="text-xs font-semibold text-slate-500 uppercase tracking-wide mb-1.5">Antwort</p>
+                    <div className="flex gap-2">
+                      {[
+                        [null,  '— Offen', 'bg-slate-100 text-slate-600 border-slate-200'],
+                        [true,  '✓ Ja',    'bg-green-50 text-green-700 border-green-300'],
+                        [false, '✗ Nein',  'bg-red-50 text-red-600 border-red-300'],
+                      ].map(([val, label, cls]) => (
+                        <button key={String(val)} onClick={() => setYesNoAnswer(val)}
+                          className={`flex-1 py-1.5 text-xs font-medium rounded-lg border transition-all
+                            ${yesNoAnswer === val
+                              ? `${cls} ring-2 ring-offset-1 ring-indigo-400`
+                              : 'bg-white text-slate-500 border-slate-200 hover:border-slate-300'}`}
+                        >{label}</button>
+                      ))}
+                    </div>
+                  </div>
+                </>
+              )}
 
-              <div>
-                <label className="block text-xs font-semibold text-slate-500 uppercase tracking-wide mb-1">
-                  Negative Aussage
-                  <span className="text-slate-300 ml-1">(optional — braucht Frage + Positiv)</span>
-                </label>
-                <HighlightedTextarea value={negative} onChange={setNegative} wordMap={wordMap}
-                  rows={2} placeholder="Das ist keine Katze." onSelectionChange={setSelection} />
-                {negative.trim() && !negativeOk && (
-                  <p className="text-xs text-red-500 mt-0.5">Frage + Positive Aussage erforderlich.</p>
-                )}
-              </div>
+              {/* QUESTION — question + positive + negative */}
+              {type === 'question' && (
+                <>
+                  <div>
+                    <label className="block text-xs font-semibold text-slate-500 uppercase tracking-wide mb-1">
+                      Frage <span className="text-red-400">*</span>
+                    </label>
+                    <HighlightedTextarea value={question} onChange={setQuestion} wordMap={wordMap}
+                      rows={2} placeholder="Was ist das?" onSelectionChange={setSelection} />
+                  </div>
+                  <div>
+                    <label className="block text-xs font-semibold text-slate-500 uppercase tracking-wide mb-1">
+                      Positive Aussage <span className="text-red-400">*</span>
+                    </label>
+                    <HighlightedTextarea value={positive} onChange={setPositive} wordMap={wordMap}
+                      rows={2} placeholder="Das ist ein Hund." onSelectionChange={setSelection} />
+                  </div>
+                  <div>
+                    <label className="block text-xs font-semibold text-slate-500 uppercase tracking-wide mb-1">
+                      Negative Aussage <span className="text-slate-400 font-normal normal-case">(optional)</span>
+                    </label>
+                    <HighlightedTextarea value={negative} onChange={setNegative} wordMap={wordMap}
+                      rows={2} placeholder="Das ist keine Katze." onSelectionChange={setSelection} />
+                  </div>
+                </>
+              )}
 
-              {Object.keys(wordMap).length > 0 && (
+              {/* WORD — question + positive/negative word pickers */}
+              {type === 'word' && (
+                <>
+                  <div>
+                    <label className="block text-xs font-semibold text-slate-500 uppercase tracking-wide mb-1">
+                      Frage <span className="text-slate-400 font-normal normal-case">(optional)</span>
+                    </label>
+                    <HighlightedTextarea value={question} onChange={setQuestion} wordMap={wordMap}
+                      rows={2} placeholder="Was ist das?" onSelectionChange={setSelection} />
+                  </div>
+                  <div>
+                    <p className="text-xs font-semibold text-slate-500 uppercase tracking-wide mb-1.5">Positive Wörter</p>
+                    <div className="flex flex-wrap gap-1 mb-1.5">
+                      {positiveWords.map(w => (
+                        <WordTag key={w.id} word={w} onRemove={id => setPositiveWords(prev => prev.filter(x => x.id !== id))} />
+                      ))}
+                    </div>
+                    <WordSearch
+                      existingIds={positiveWords.map(w => w.id)}
+                      onAdd={w => setPositiveWords(prev => prev.some(x => x.id === w.id) ? prev : [...prev, w])}
+                      placeholder="Positives Wort suchen…"
+                    />
+                  </div>
+                  <div>
+                    <p className="text-xs font-semibold text-slate-500 uppercase tracking-wide mb-1.5">Negative Wörter</p>
+                    <div className="flex flex-wrap gap-1 mb-1.5">
+                      {negativeWords.map(w => (
+                        <WordTag key={w.id} word={w} onRemove={id => setNegativeWords(prev => prev.filter(x => x.id !== id))} />
+                      ))}
+                    </div>
+                    <WordSearch
+                      existingIds={negativeWords.map(w => w.id)}
+                      onAdd={w => setNegativeWords(prev => prev.some(x => x.id === w.id) ? prev : [...prev, w])}
+                      placeholder="Negatives Wort suchen…"
+                    />
+                  </div>
+                </>
+              )}
+
+              {/* Detected words indicator */}
+              {(type === 'text' || type === 'question') && Object.keys(wordMap).length > 0 && (
                 <div className="flex flex-wrap gap-1">
                   <span className="text-xs text-slate-400 w-full">Erkannte Wörter:</span>
                   {Object.entries(wordMap).map(([title, w]) => (
@@ -385,67 +474,14 @@ function PairForm({ objectId, onPairSaved }) {
             </div>
           )}
 
-          {/* ── Ja/Nein section ── */}
-          {typeYesNo && (
-            <div className="pt-2 border-t border-indigo-100">
-              <p className="text-xs font-semibold text-slate-500 uppercase tracking-wide mb-2">Antwort</p>
-              <div className="flex gap-2">
-                {[
-                  [null,  '— Offen', 'bg-slate-100 text-slate-600 border-slate-200'],
-                  [true,  '✓ Ja',    'bg-green-50 text-green-700 border-green-300'],
-                  [false, '✗ Nein',  'bg-red-50 text-red-600 border-red-300'],
-                ].map(([val, label, cls]) => (
-                  <button key={String(val)}
-                    onClick={() => setYesNoAnswer(val)}
-                    className={`flex-1 py-1.5 text-xs font-medium rounded-lg border transition-all
-                      ${yesNoAnswer === val ? `${cls} ring-2 ring-offset-1 ring-indigo-400` : 'bg-white text-slate-500 border-slate-200 hover:border-slate-300'}`}
-                  >
-                    {label}
-                  </button>
-                ))}
-              </div>
-            </div>
-          )}
-
-          {/* ── Wort section ── */}
-          {typeWord && (
-            <div className="pt-2 border-t border-indigo-100 space-y-2.5">
-              <div>
-                <p className="text-xs font-semibold text-slate-500 uppercase tracking-wide mb-1.5">Positive Wörter</p>
-                <div className="flex flex-wrap gap-1 mb-1.5">
-                  {positiveWords.map(w => (
-                    <WordTag key={w.id} word={w} onRemove={id => setPositiveWords(prev => prev.filter(x => x.id !== id))} />
-                  ))}
-                </div>
-                <WordSearch
-                  existingIds={positiveWords.map(w => w.id)}
-                  onAdd={w => setPositiveWords(prev => prev.some(x => x.id === w.id) ? prev : [...prev, w])}
-                  placeholder="Positives Wort suchen…"
-                />
-              </div>
-
-              <div>
-                <p className="text-xs font-semibold text-slate-500 uppercase tracking-wide mb-1.5">Negative Wörter</p>
-                <div className="flex flex-wrap gap-1 mb-1.5">
-                  {negativeWords.map(w => (
-                    <WordTag key={w.id} word={w} onRemove={id => setNegativeWords(prev => prev.filter(x => x.id !== id))} />
-                  ))}
-                </div>
-                <WordSearch
-                  existingIds={negativeWords.map(w => w.id)}
-                  onAdd={w => setNegativeWords(prev => prev.some(x => x.id === w.id) ? prev : [...prev, w])}
-                  placeholder="Negatives Wort suchen…"
-                />
-              </div>
-            </div>
-          )}
-
           {/* ── Save ── */}
           <div className="pt-2 border-t border-indigo-100 space-y-1.5">
-            {!canSave && <p className="text-xs text-amber-600">{validationHint()}</p>}
+            {type && !canSave() && (
+              <p className="text-xs text-amber-600">{validationHint()}</p>
+            )}
             <button
               onClick={handleSave}
-              disabled={saving || !canSave}
+              disabled={saving || !canSave()}
               className="w-full py-2 text-xs font-medium rounded-lg bg-green-600 hover:bg-green-700 disabled:opacity-40 text-white transition-colors"
             >
               {saving ? 'Speichern…' : '✓ Pair speichern'}
@@ -527,6 +563,7 @@ function PairsPanel({ selectedObject, objectPairs, loadingPairs, onPairSaved })
             )}
           </div>
         ))}
+        </div>
       </div>
     </aside>
   );