Update app.py

app.py

@@ -6,6 +6,7 @@ import os, random, tempfile, json
 import re
 import threading
 import uuid
+import csv  # ✅ 追加：csv.writer用
 
 # --- API設定 ---
 API_KEY = os.getenv("API_KEY")
@@ -71,19 +72,17 @@ def _new_session_state():
 
 # --- ログ追記（CSVのみ・固定カラムで統一） ---
 def log_to_csv(entry: dict):
+    # ✅ pandas -> csv.writer に置換（列順は LOG_COLUMNS で保証）
     with _log_lock:
-        row = {col: entry.get(col, None) for col in LOG_COLUMNS}
-        df = pd.DataFrame([row], columns=LOG_COLUMNS)
-
         file_exists = os.path.exists(LOG_FILE)
-        df.to_csv(
-            LOG_FILE,
-            mode="a",
-            index=False,
-            header=not file_exists,
-            encoding="utf-8",
-            lineterminator="\n",
-        )
+
+        with open(LOG_FILE, mode="a", encoding="utf-8", newline="") as f:
+            writer = csv.DictWriter(f, fieldnames=LOG_COLUMNS)
+            if not file_exists:
+                writer.writeheader()
+
+            row = {col: entry.get(col, None) for col in LOG_COLUMNS}
+            writer.writerow(row)
 
 def log_event(state: dict, **kwargs):
     # ✅ Excelで#####になりにくいよう「JST」を付けてテキスト化
@@ -403,4 +402,5 @@ with gr.Blocks() as demo:
         outputs=[dl_file, dl_msg]
     )
 
-demo.launch()
+# ✅ 追加：queue（同時アクセス耐性UP）
+demo.queue(max_size=64).launch()