feat: object words in left sidebar + suggestions in pair form

- Backend: GET /api/directus/db-objects/<id>/words via db_objects_db_words
- GenerateIt: load objectWords on object select, show as chips in left sidebar
- PairForm: show object words as clickable suggestion chips above word input
  (click to add, greyed out if already added)

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

app.py

@@ -1877,6 +1877,33 @@ def directus_db_object_pairs(obj_id):
         return jsonify({"ok": True, "pair_id": pair_id, "statement_id": stmt_id, "question_id": q_id})
 
 
+@app.route("/api/directus/db-objects/<obj_id>/words", methods=["GET"])
+def directus_db_object_words(obj_id):
+    """Gibt alle db_words zurück, die via db_objects_db_words mit dem Objekt verknüpft sind."""
+    token = request.headers.get("Authorization", "")
+    data, s = _directus(
+        "GET",
+        f"/items/db_objects_db_words?filter[db_objects_id][_eq]={obj_id}"
+        f"&fields=id,db_words_id.id,db_words_id.titel_de,db_words_id.level,db_words_id.status&limit=500",
+        token,
+    )
+    if s != 200:
+        return jsonify({"data": []})
+    items = []
+    for entry in (data.get("data") or []):
+        word = entry.get("db_words_id") or {}
+        if not isinstance(word, dict) or not word.get("id"):
+            continue
+        if word.get("status") == "archived":
+            continue
+        items.append({
+            "word_id": word["id"],
+            "titel_de": word.get("titel_de", ""),
+            "level": word.get("level") or 50,
+        })
+    return jsonify({"data": items})
+
+
 @app.route("/api/directus/db-pairs/<pair_id>", methods=["PATCH", "DELETE"])
 def directus_db_pair(pair_id):
     """PATCH: level + question/statement inline aktualisieren.