opt(module): 改进配置文件备份格式

Author: Seyud

config

@@ -31,10 +31,11 @@ if [ -f "$CONFIG_FILE" ]; then
 
     if chooseport; then
         ui_print "- 已选择：使用模块默认配置"
-        ui_print "- 备份旧配置到: $CONFIG_FILE.$(date +%Y%m%d_%H%M%S).bak"
-        cp -f "$CONFIG_FILE" "$CONFIG_FILE.$(date +%Y%m%d_%H%M%S).bak"
-        chmod 644 "$CONFIG_FILE"*
-        chcon u:object_r:system_file:s0 "$CONFIG_FILE"* 2>/dev/null || true
+        BACKUP_FILE="$CONFIG_DIR/$(date +%Y%m%d_%H%M%S)_config.toml.bak"
+        ui_print "- 备份旧配置到: $BACKUP_FILE"
+        cp -f "$CONFIG_FILE" "$BACKUP_FILE"
+        chmod 644 "$CONFIG_FILE" "$BACKUP_FILE"
+        chcon u:object_r:system_file:s0 "$CONFIG_FILE" "$BACKUP_FILE" 2>/dev/null || true
     else
         ui_print "- 已选择：使用现有配置"
         SHOULD_COPY_CONFIG=false