优化设备配置流程，重构用户增删改查及信息下发逻辑

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

utils/request.js

@@ -20,7 +20,7 @@ const hideLoading = () => {
 	}
 }
 
-const ajax = (url, params, methos, loading = true, title = "加载中...") => {
+const ajax = (url, params, methos, loading = true, title = "加载中...", contentType = "application/json") => {
 	let requestUrl = app.globalData.wxRequestUrl + url;
 	if (loading) {
 		showLoading(title);
@@ -28,7 +28,7 @@ const ajax = (url, params, methos, loading = true, title = "加载中...") => {
 
 	return new Promise((resolve, reject) => {
 		let header = {
-			"content-type": "application/json"
+			"content-type": contentType
 		};
 
 		let token = wx.getStorageSync("token");