chore: remove dead debug code — isDevMode, debug CSS, __DEV__ flag

miniprogram/app.wxss

@@ -250,23 +250,3 @@ page {
 .nav-back-light {
   color: rgba(255, 255, 255, 0.9);
 }
-
-.debug-actions {
-  margin-top: 40rpx;
-  padding: 20rpx;
-  background: #fff8e1;
-  border-radius: 12rpx;
-  border: 2rpx dashed #f5a623;
-}
-
-.debug-label {
-  font-size: 24rpx;
-  color: #f5a623;
-  margin-bottom: 16rpx;
-  font-weight: 600;
-}
-
-.debug-actions .btn-sm {
-  margin-top: 12rpx;
-  font-size: 26rpx;
-}

miniprogram/config/env.js

@@ -1,4 +1,3 @@
-// Production: change to 'prod' to disable debug buttons and mock endpoints
 var ENV = 'prod'
 
 var API_BASES = {
@@ -7,10 +6,7 @@ var API_BASES = {
   prod: 'https://api.vsai.net.cn'
 }
 
-var __DEV__ = ENV !== 'prod'
-
 module.exports = {
   ENV: ENV,
-  API_BASE: API_BASES[ENV],
-  __DEV__: __DEV__
+  API_BASE: API_BASES[ENV]
 }

miniprogram/utils/page.js

@@ -16,10 +16,4 @@ function navigateBack(fallbackUrl) {
   })
 }
 
-/** Check if dev mode is enabled */
-function isDevMode() {
-  var config = require('../config/env')
-  return config.__DEV__ || false
-}
-
-module.exports = { getStatusBarHeight: getStatusBarHeight, navigateBack: navigateBack, isDevMode: isDevMode }
+module.exports = { getStatusBarHeight: getStatusBarHeight, navigateBack: navigateBack }