fix: correct region mapping (swap left/right, swap middle/bottom) and auto-scan proceeds on timeout

Region name mapping corrected to match actual hardware IO positions:
- 0x01: 左区→右区, 0x02: 右区→左区
- 0x08: 下区→中区, 0x10: 中区→下区
Auto-scan no longer shows timeout error, proceeds to next step instead.

miniprogram/pages/treating/treating.js

@@ -20,7 +20,7 @@ Page({
   },
 
   _getRegionText: function (regionMask) {
-    var REGION_MAP = {1:'左区', 2:'右区', 4:'上区', 8:'下区', 16:'中区', 32:'左上区', 64:'右上区'}
+    var REGION_MAP = {1:'右区', 2:'左区', 4:'上区', 8:'中区', 16:'下区', 32:'左上区', 64:'右上区'}
     if (regionMask === 0x7F) return '全区域'
     var names = []
     for (var bit in REGION_MAP) {