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sync.py

@@ -96,14 +96,24 @@ def sync():
         print('兩邊一致，不需要同步')
         return
 
-    # 備份 Local
+    # 備份 Local（當天最多 5 個，總共最多 15 個）
     if LOCAL_DB.exists():
         BACKUP_DIR.mkdir(exist_ok=True)
+        today = datetime.now().strftime('%Y%m%d')
         ts = datetime.now().strftime('%Y%m%d_%H%M%S')
         bk = BACKUP_DIR / f'pra_data_before_sync_{ts}.db'
         shutil.copy2(str(LOCAL_DB), str(bk))
         print(f'已備份 Local → {bk.name}')
 
+        # 當天最多 5 個
+        today_bks = sorted(BACKUP_DIR.glob(f'pra_data_before_sync_{today}_*.db'))
+        for old in today_bks[:-5]:
+            old.unlink()
+        # 總共最多 15 個
+        all_bks = sorted(BACKUP_DIR.glob('pra_data_before_sync_*.db'))
+        for old in all_bks[:-15]:
+            old.unlink()
+
     # 直接用雲端 DB 覆蓋 Local
     shutil.copy2(cloud_path, str(LOCAL_DB))