Refactor WeChat integration to support multiple mini programs, removing hardcoded WeChat credentials and updating user model and authentication flow accordingly.

config/config.go

@@ -10,7 +10,6 @@ import (
 type Config struct {
 	Server   ServerConfig
 	Database DatabaseConfig
-	WeChat   WeChatConfig
 	JWT      JWTConfig
 }
 
@@ -27,11 +26,6 @@ type DatabaseConfig struct {
 	DBName   string
 }
 
-type WeChatConfig struct {
-	AppID     string
-	AppSecret string
-}
-
 type JWTConfig struct {
 	Secret string
 	Expire int
@@ -57,10 +51,6 @@ func LoadConfig() {
 			Password: getEnv("DB_PASSWORD", ""),
 			DBName:   getEnv("DB_NAME", "wx_service"),
 		},
-		WeChat: WeChatConfig{
-			AppID:     getEnv("WECHAT_APP_ID", ""),
-			AppSecret: getEnv("WECHAT_APP_SECRET", ""),
-		},
 		JWT: JWTConfig{
 			Secret: getEnv("JWT_SECRET", "your-secret-key"),
 			Expire: 86400, // 24小时