Orphan-Junction-Cleanup + Refresh-Button für Fragen/Wörter

- Backend: DELETE question/word räumt alle Junction-Zeilen mit auf
- Backend: /purge-orphans bereinigt verwaiste Junctions per Objekt
- Frontend: reloadQW ruft purgeOrphans vor dem Neu-Laden auf
- Frontend: ↺-Button in Wörter- und Fragen-Sidebar

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

app.py

@@ -1242,10 +1242,22 @@ def get_object_words_list(obj_id: str):
     return jsonify({"data": items})
 
 
+def _delete_junction_rows(collection: str, field: str, value: str, token: str):
+    """Löscht alle Junction-Zeilen für einen gegebenen Fremdschlüssel."""
+    data, s = _directus("GET",
+        f"/items/{collection}?filter[{field}][_eq]={value}&fields=id&limit=5000", token)
+    ids = [e["id"] for e in (data.get("data") or []) if e.get("id")]
+    if ids:
+        _directus("DELETE", f"/items/{collection}", token, ids)
+
+
 @app.route("/api/question/<q_id>", methods=["DELETE"])
 def delete_question_item(q_id: str):
-    """Löscht eine Frage aus Directus."""
+    """Löscht eine Frage + alle zugehörigen Junction-Zeilen aus Directus."""
     token = request.headers.get("Authorization", "")
+    _delete_junction_rows("questions_objects", "questions_id", q_id, token)
+    _delete_junction_rows("questions_distractor_words", "questions_id", q_id, token)
+    _delete_junction_rows("questions_words", "questions_id", q_id, token)
     _, status = _directus("DELETE", f"/items/questions/{q_id}", token)
     if status in (200, 204):
         return jsonify({"ok": True})
@@ -1254,14 +1266,44 @@ def delete_question_item(q_id: str):
 
 @app.route("/api/word/<w_id>", methods=["DELETE"])
 def delete_word_item(w_id: str):
-    """Löscht ein Wort aus Directus."""
+    """Löscht ein Wort + alle zugehörigen Junction-Zeilen aus Directus."""
     token = request.headers.get("Authorization", "")
+    _delete_junction_rows("words_objects", "words_id", w_id, token)
+    _delete_junction_rows("questions_words", "words_id", w_id, token)
+    _delete_junction_rows("questions_distractor_words", "words_id", w_id, token)
     _, status = _directus("DELETE", f"/items/words/{w_id}", token)
     if status in (200, 204):
         return jsonify({"ok": True})
     return jsonify({"error": "Delete failed"}), status
 
 
+@app.route("/api/object/<obj_id>/purge-orphans", methods=["POST"])
+def purge_orphan_junctions(obj_id: str):
+    """
+    Bereinigt verwaiste Junction-Einträge für ein Objekt:
+    Entfernt Zeilen aus questions_objects/words_objects deren Frage/Wort nicht mehr existiert.
+    """
+    token = request.headers.get("Authorization", "")
+    removed = 0
+
+    for junc_col, fk_field, item_col in [
+        ("questions_objects", "questions_id", "questions"),
+        ("words_objects", "words_id", "words"),
+    ]:
+        junc_data, _ = _directus("GET",
+            f"/items/{junc_col}?filter[objects_id][_eq]={obj_id}&fields=id,{fk_field}&limit=5000", token)
+        for row in (junc_data.get("data") or []):
+            fk_val = row.get(fk_field)
+            if not fk_val:
+                continue
+            item_data, s = _directus("GET", f"/items/{item_col}/{fk_val}?fields=id", token)
+            if s != 200 or not item_data.get("data"):
+                _directus("DELETE", f"/items/{junc_col}/{row['id']}", token)
+                removed += 1
+
+    return jsonify({"ok": True, "orphans_removed": removed})
+
+
 @app.route("/api/fix-distractor-field", methods=["POST"])
 def fix_distractor_field():
     """Setzt special=m2m auf questions.distractor_words (einmalig)."""