Align GoChat with Chatwoot frontend contracts

internal/middleware/auth.go

@@ -32,9 +32,12 @@ func AuthMiddleware(cfg *config.JWTConfig) gin.HandlerFunc {
 func AuthMiddlewareWithService(jwtSvc *auth.JWTService) gin.HandlerFunc {
 	return func(c *gin.Context) {
 		authHeader := c.GetHeader("Authorization")
-		if authHeader != "" {
+		chatwootAccessToken := strings.TrimSpace(c.GetHeader("access-token"))
+		if authHeader != "" || chatwootAccessToken != "" {
 			tokenString := strings.TrimPrefix(authHeader, "Bearer ")
-			if tokenString == authHeader {
+			if authHeader == "" {
+				tokenString = chatwootAccessToken
+			} else if tokenString == authHeader {
 				c.AbortWithStatusJSON(http.StatusUnauthorized, gin.H{"error": "bearer token required"})
 				return
 			}
@@ -105,4 +108,4 @@ func GenerateToken(cfg *config.JWTConfig, userID uint, accountID uint, role stri
 
 	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
 	return token.SignedString([]byte(cfg.Secret))
-}
+}