Refactor controllers to use httpx for JSON responses and eliminate context dependency

- Updated TagController methods to use httpx.WriteJSON for consistent JSON response handling.
- Refactored TicketController to replace context-dependent methods with standalone functions using httpx.
- Modified UserController to utilize httpx for error handling and response formatting.
- Adjusted WechatController to remove context dependency and standardize response handling.

internal/controllers/api/customer_controller.go

@@ -1,6 +1,7 @@
 package api
 
 import (
+	"cs-agent/internal/pkg/httpx"
 	"cs-agent/internal/pkg/openidentity"
 	"cs-agent/internal/services"
 
@@ -8,22 +9,22 @@ import (
 	"github.com/mlogclub/simple/web"
 )
 
-type CustomerController struct {
-	Ctx *gin.Context
-}
-
-func (c *CustomerController) PostSession_exchange() *web.JsonResult {
-	channel := services.ChannelService.GetEnabledChannel(c.Ctx)
+func CustomerPostSession_exchange(ctx *gin.Context) {
+	channel := services.ChannelService.GetEnabledChannel(ctx)
 	if channel == nil {
-		return web.JsonErrorMsg("接入渠道不存在或已停用")
+		httpx.WriteJSON(ctx, web.JsonErrorMsg("接入渠道不存在或已停用"))
+		return
 	}
-	externalUser, err := openidentity.GetExternalUser(c.Ctx, services.ChannelService.GetUserTokenSecret(channel))
+	externalUser, err := openidentity.GetExternalUser(ctx, services.ChannelService.GetUserTokenSecret(channel))
 	if err != nil {
-		return web.JsonError(err)
+		httpx.WriteJSON(ctx, err)
+		return
 	}
 	resp, err := services.CustomerSessionService.Exchange(channel, *externalUser)
 	if err != nil {
-		return web.JsonError(err)
+		httpx.WriteJSON(ctx, err)
+		return
 	}
-	return web.JsonData(resp)
+	httpx.WriteJSON(ctx, resp)
+	return
 }