feat: 添加云端函数HTTP请求、SMTP邮件、数据库操作能力

- 添加HTTP客户端工具支持GET/POST请求
- 添加SMTP邮件发送功能
- 添加数据库操作(db.getRecords, db.deleteRecord, db.deleteRecords)
- 添加订单管理云端函数(读取、接收、筛选、成功、失败)
- 添加测试推送和邮件通知云端函数
- 修复云端函数编辑页面预览代码换行显示
- 云端变量数据模型重构(合并数据类型)

backend/internal/router/developer/cloud.go

@@ -398,7 +398,6 @@ func handleCreateCloudVariable(c *gin.Context) {
 		Key             string `json:"key"`
 		DefaultValue    string `json:"default_value"`
 		VarType         string `json:"var_type"`
-		DataType        string `json:"data_type"`
 		MaxRecords      int    `json:"max_records"`
 		Scope           string `json:"scope"`
 		WritePermission string `json:"write_permission"`
@@ -431,17 +430,12 @@ func handleCreateCloudVariable(c *gin.Context) {
 		req.VarType = "string"
 	}
 
-	if req.DataType != "single" && req.DataType != "stream" {
-		req.DataType = "single"
-	}
-
 	variable := model.CloudVariable{
 		UserID:          userID,
 		AppID:           &req.AppID,
 		Key:             req.Key,
 		DefaultValue:    req.DefaultValue,
 		VarType:         req.VarType,
-		DataType:        req.DataType,
 		MaxRecords:      req.MaxRecords,
 		Scope:           req.Scope,
 		WritePermission: req.WritePermission,
@@ -464,7 +458,6 @@ func handleUpdateCloudVariable(c *gin.Context) {
 		Key             string `json:"key"`
 		DefaultValue    string `json:"default_value"`
 		VarType         string `json:"var_type"`
-		DataType        string `json:"data_type"`
 		MaxRecords      int    `json:"max_records"`
 		WritePermission string `json:"write_permission"`
 		Description     string `json:"description"`
@@ -485,9 +478,6 @@ func handleUpdateCloudVariable(c *gin.Context) {
 	variable.Key = req.Key
 	variable.DefaultValue = req.DefaultValue
 	variable.VarType = req.VarType
-	if req.DataType == "single" || req.DataType == "stream" {
-		variable.DataType = req.DataType
-	}
 	variable.MaxRecords = req.MaxRecords
 	if req.WritePermission == "admin" || req.WritePermission == "user" || req.WritePermission == "app_user" {
 		variable.WritePermission = req.WritePermission
@@ -715,8 +705,8 @@ func handleGetCloudVariableRecords(c *gin.Context) {
 		return
 	}
 
-	if variable.DataType != "stream" {
-		response.Error(c, 400, "该变量不是流水类型")
+	if variable.VarType != "stream" {
+		response.Error(c, 400, "该变量不是记录类型")
 		return
 	}
 
@@ -794,8 +784,8 @@ func handleDeleteCloudVariableRecords(c *gin.Context) {
 		return
 	}
 
-	if variable.DataType != "stream" {
-		response.Error(c, 400, "该变量不是流水类型")
+	if variable.VarType != "stream" {
+		response.Error(c, 400, "该变量不是记录类型")
 		return
 	}