fix: 备份与恢复脚本深度修复

backup-db.sh:
- 新增备份后 SQLite 文件有效性验证（scp 传输后检查）

restore-db.sh (云端恢复):
- 修复：验证用 docker cp + docker exec sqlite3，不再依赖宿主机 sqlite3
- 修复：先停止容器再替换数据库，防止写入冲突
- 修复：替换后删除 WAL/SHM 残留文件，防止旧日志与新库不匹配损坏

backup-db.sh

@@ -29,6 +29,16 @@ log "复制到本地..."
 scp "txjp:/tmp/db-backup/assets-${TIMESTAMP}.db" "${LOCAL_DIR}/"
 scp "txjp:/tmp/db-backup/issue-${TIMESTAMP}.db" "${LOCAL_DIR}/"
 
+# 验证备份文件为有效 SQLite 数据库
+log "验证备份完整性..."
+for f in "${LOCAL_DIR}/assets-${TIMESTAMP}.db" "${LOCAL_DIR}/issue-${TIMESTAMP}.db"; do
+  if ! sqlite3 "$f" "SELECT count(*) FROM sqlite_master" > /dev/null 2>&1; then
+    echo "[错误] 备份文件无效或损坏: $f"
+    exit 1
+  fi
+done
+log "备份文件验证通过"
+
 # 清理云端临时文件
 ssh txjp "rm -rf /tmp/db-backup"
 

restore-db.sh

@@ -155,8 +155,10 @@ restore_cloud() {
     exit 1
   fi
 
-  # 2. 验证备份文件
-  if ! ssh txjp "sqlite3 ${BACKUP_PATH} 'SELECT count(*) FROM sqlite_master' > /dev/null 2>&1"; then
+  # 2. 验证备份文件（通过临时容器，避免依赖宿主机 sqlite3）
+  if ! ssh txjp "docker cp ${BACKUP_PATH} ${CONTAINER}:/tmp/restore-check.db 2>/dev/null && \
+                docker exec ${CONTAINER} sqlite3 /tmp/restore-check.db 'SELECT count(*) FROM sqlite_master' > /dev/null 2>&1 && \
+                docker exec ${CONTAINER} rm /tmp/restore-check.db"; then
     echo "[错误] 备份文件不是有效的 SQLite 数据库"
     exit 1
   fi
@@ -191,21 +193,29 @@ restore_cloud() {
     exit 0
   fi
 
-  # 5. 云端安全备份当前数据库
+  # 5. 停止容器（确保数据库不被写入，安全替换）
+  echo "[操作] 停止容器 ${CONTAINER}..."
+  ssh txjp "cd /root/docker/${PROJECT_DIR} && docker compose stop ${CONTAINER}"
+
+  # 6. 备份当前数据库（容器已停止，安全复制）
   local SAFE_NAME="before-restore-$(date +%Y%m%d_%H%M%S).db"
   echo "[操作] 备份云端当前数据库..."
   ssh txjp "docker cp ${CONTAINER}:${DB_PATH_IN_CONTAINER} /root/docker/db-backups/${SAFE_NAME}"
   echo "[备份] 当前数据库已保存至云端: /root/docker/db-backups/${SAFE_NAME}"
 
-  # 6. 复制备份文件到容器
+  # 7. 替换数据库
   echo "[操作] 复制备份文件到容器..."
   ssh txjp "docker cp ${BACKUP_PATH} ${CONTAINER}:${DB_PATH_IN_CONTAINER}"
 
-  # 7. 重启容器
-  echo "[操作] 重启容器 ${CONTAINER}..."
-  ssh txjp "cd /root/docker/${PROJECT_DIR} && docker compose restart ${CONTAINER}"
+  # 8. 删除残留 WAL/SHM 文件，防止旧日志与新数据库不匹配导致损坏
+  echo "[操作] 清理残留 WAL/SHM 文件..."
+  ssh txjp "docker exec ${CONTAINER} rm -f ${DB_PATH_IN_CONTAINER}-shm ${DB_PATH_IN_CONTAINER}-wal" 2>/dev/null || true
 
-  # 8. 验证
+  # 9. 启动容器
+  echo "[操作] 启动容器 ${CONTAINER}..."
+  ssh txjp "cd /root/docker/${PROJECT_DIR} && docker compose start ${CONTAINER}"
+
+  # 10. 验证
   sleep 3
   echo ""
   echo "[验证] 恢复后数据:"