fix(conversations): 修复状态切换与历史会话路由

- 处理历史主键与 display_id 冲突，确保消息和状态操作命中同一会话
- 允许已软删除收件箱中的历史会话切换状态
- 解决会话后自动打开列表中的相邻会话

backend/internal/handler/api/v1/conversation_handler_crud_test.go

@@ -799,6 +799,27 @@ func (s *ConversationCrudTestSuite) TestToggleStatus_Success() {
 	assert.Equal(s.T(), "resolved", resp.Payload.CurrentStatus)
 }
 
+func (s *ConversationCrudTestSuite) TestToggleStatus_SoftDeletedInboxStillUpdatesConversation() {
+	s.Require().NoError(s.db.Delete(s.testInbox).Error)
+
+	body, _ := json.Marshal(map[string]interface{}{
+		"status": "resolved",
+	})
+	w := httptest.NewRecorder()
+	req, _ := http.NewRequest("POST", s.convURL(s.testConv.ID)+"/toggle_status", bytes.NewReader(body))
+	req.Header.Set("Content-Type", "application/json")
+	s.router.ServeHTTP(w, req)
+
+	s.Require().Equal(http.StatusOK, w.Code, w.Body.String())
+	var resp struct {
+		Payload struct {
+			CurrentStatus string `json:"current_status"`
+		} `json:"payload"`
+	}
+	s.Require().NoError(json.Unmarshal(w.Body.Bytes(), &resp))
+	s.Equal("resolved", resp.Payload.CurrentStatus)
+}
+
 func (s *ConversationCrudTestSuite) TestToggleStatus_NoStatusTogglesLikeChatwoot() {
 	w := httptest.NewRecorder()
 	req, _ := http.NewRequest("POST", s.convURL(s.testConv.ID)+"/toggle_status", nil)