fix: derive OUTPUT from config output_dir so CONFIG override counts correctly

scripts/generate_ar30.sh

@@ -26,7 +26,6 @@ TARGET=30
 CONFIG="${CONFIG:-config/question_gen_ar30.yaml}"
 STORE_DIR="${STORE_DIR:-store}"
 DB_PATH="${DB_PATH:-logs/question_gen_ar30.db}"
-OUTPUT="store/questions/generated-ar30/accepted_questions.json"
 MAX_ROUNDS=10
 BASE_SEED=2024
 EARLY_STOP_ROUNDS="${EARLY_STOP_ROUNDS:-2}"   # 连续 N 轮 0 产出则提前停止
@@ -40,6 +39,12 @@ source .env
 
 PYTHON="$(conda run -n Video-Tree-TRM which python)"
 
+# OUTPUT 从 CONFIG 的 output_dir 推导，使 CONFIG 覆盖时计数路径自动跟随；可用 OUTPUT env 覆盖
+if [ -z "${OUTPUT:-}" ]; then
+    OUTPUT_DIR="$("$PYTHON" -c "import yaml; print(yaml.safe_load(open('$CONFIG'))['question_gen_v2']['output_dir'])")"
+    OUTPUT="${OUTPUT_DIR}/accepted_questions.json"
+fi
+
 count_accepted() {
     if [ -f "$OUTPUT" ]; then
         "$PYTHON" -c "