feat(conversations): align toggle priority fallback

internal/handler/api/v1/conversation_handler.go

@@ -576,9 +576,11 @@ func (h *ConversationHandler) TogglePriority(c *gin.Context) {
 	var req struct {
 		Priority *string `json:"priority"`
 	}
-	if err := c.ShouldBindJSON(&req); err != nil {
-		response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrValidation, err.Error())
-		return
+	if c.Request.Body != nil && c.Request.Body != http.NoBody {
+		if err := c.ShouldBindJSON(&req); err != nil && !errors.Is(err, io.EOF) {
+			response.AbortWithStatusError(c, http.StatusBadRequest, response.ErrValidation, err.Error())
+			return
+		}
 	}
 	priority := ""
 	if req.Priority != nil {

internal/handler/api/v1/conversation_handler_crud_test.go

@@ -125,6 +125,7 @@ func (s *ConversationCrudTestSuite) SetupSuite() {
 			conversations.DELETE("/:conversation_id", handler.Delete)
 			conversations.POST("/:conversation_id/assign", handler.AssignAgent)
 			conversations.POST("/:conversation_id/toggle_status", handler.ToggleStatus)
+			conversations.POST("/:conversation_id/toggle_priority", handler.TogglePriority)
 			conversations.POST("/:conversation_id/mute", handler.Mute)
 			conversations.POST("/:conversation_id/unmute", handler.Unmute)
 			conversations.POST("/:conversation_id/labels", handler.UpdateLabels)
@@ -1553,6 +1554,30 @@ func (s *ConversationCrudTestSuite) TestUpdatePriority_NotFound() {
 	assert.Equal(s.T(), http.StatusNotFound, w.Code)
 }
 
+func (s *ConversationCrudTestSuite) TestTogglePriority_EmptyBodyClearsPriorityLikeChatwoot() {
+	s.Require().NoError(s.db.Model(&model.Conversation{}).Where("id = ?", s.testConv.ID).Update("priority", "urgent").Error)
+
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest("POST", s.convURL(s.testConv.ID)+"/toggle_priority", nil)
+	s.router.ServeHTTP(w, req)
+
+	assert.Equal(s.T(), http.StatusOK, w.Code)
+	assert.Empty(s.T(), w.Body.String())
+
+	var conversation model.Conversation
+	s.Require().NoError(s.db.First(&conversation, s.testConv.ID).Error)
+	assert.Equal(s.T(), "none", conversation.Priority)
+}
+
+func (s *ConversationCrudTestSuite) TestTogglePriority_InvalidJSON() {
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest("POST", s.convURL(s.testConv.ID)+"/toggle_priority", bytes.NewReader([]byte("{bad json")))
+	req.Header.Set("Content-Type", "application/json")
+	s.router.ServeHTTP(w, req)
+
+	assert.Equal(s.T(), http.StatusBadRequest, w.Code)
+}
+
 // ========== AssignTeam Handler Tests ==========
 
 func (s *ConversationCrudTestSuite) TestAssignTeam_Success() {