fix: restore objectAssignments in EditPairForm on load

Extract {{label.o:objectId}} refs from raw sentence text before resolving
placeholders, then reconcile with wordMap once it's built so the object
assignment dropdown reflects the saved state on re-open.

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

src/pages/ContentCreation.jsx

@@ -483,6 +483,9 @@ function EditPairForm({ pair, allObjects, onSaved, onCancel, onDeleted }) {
   const [creatingWord, setCreatingWord] = useState(false);
   const [confirmDelete, setConfirmDelete] = useState(false);
   const [deleting, setDeleting] = useState(false);
+  // Stores label→objectId extracted from raw placeholder text during load,
+  // used to restore objectAssignments once wordMap is built.
+  const labelToObjectId = useRef({});
 
   useEffect(() => { setWordInput(selection); }, [selection]);
 
@@ -496,16 +499,26 @@ function EditPairForm({ pair, allObjects, onSaved, onCancel, onDeleted }) {
   }
 
   useEffect(() => {
+    labelToObjectId.current = {};
+    function extractObjectRefs(rawText) {
+      const re = /\{\{([^.}]+)\.o:([0-9a-f-]{36})\}\}/gi;
+      let m;
+      while ((m = re.exec(rawText)) !== null) {
+        labelToObjectId.current[m[1].toLowerCase()] = m[2];
+      }
+    }
     async function load() {
       try {
         if (pair.question_id) {
           const q = await apiFetch(`/questions/${pair.question_id}`);
-          setQuestion(await resolvePlaceholders(q[`sentence_${lang}`] || q.sentence_de || '', allObjects));
+          const rawQ = q[`sentence_${lang}`] || q.sentence_de || '';
+          extractObjectRefs(rawQ);
+          setQuestion(await resolvePlaceholders(rawQ, allObjects));
         }
         if (pair.positive_statement_id) {
           const s = await apiFetch(`/statements/${pair.positive_statement_id}`);
           const raw = s[`positive_sentence_${lang}`] || s.positive_sentence_de || '';
-          if (raw) setPositive(await resolvePlaceholders(raw, allObjects));
+          if (raw) { extractObjectRefs(raw); setPositive(await resolvePlaceholders(raw, allObjects)); }
           if (s.answer !== null && s.answer !== undefined) setYesNoAnswer(s.answer);
           if (s.positive_word_ids?.length) {
             const words = await Promise.all(s.positive_word_ids.map(id => apiFetch(`/words/${id}`).catch(() => null)));
@@ -515,7 +528,7 @@ function EditPairForm({ pair, allObjects, onSaved, onCancel, onDeleted }) {
         if (pair.negative_statement_id) {
           const s = await apiFetch(`/statements/${pair.negative_statement_id}`);
           const raw = s[`negative_sentence_${lang}`] || s.negative_sentence_de || '';
-          if (raw) setNegative(await resolvePlaceholders(raw, allObjects));
+          if (raw) { extractObjectRefs(raw); setNegative(await resolvePlaceholders(raw, allObjects)); }
           if (s.negative_word_ids?.length) {
             const words = await Promise.all(s.negative_word_ids.map(id => apiFetch(`/words/${id}`).catch(() => null)));
             setNegativeWords(words.filter(Boolean));
@@ -551,6 +564,17 @@ function EditPairForm({ pair, allObjects, onSaved, onCancel, onDeleted }) {
           }
         });
         setWordMap(map);
+        // Restore objectAssignments from placeholders extracted during load
+        if (Object.keys(labelToObjectId.current).length) {
+          setObjectAssignments(prev => {
+            const restored = {};
+            Object.entries(map).forEach(([label, w]) => {
+              const objId = labelToObjectId.current[label.toLowerCase()];
+              if (objId) restored[w.id] = objId;
+            });
+            return Object.keys(restored).length ? { ...restored, ...prev } : prev;
+          });
+        }
       } catch { /* ignore word detection errors */ }
     }, 600);
     return () => clearTimeout(t);