refactor: remove Subject field from Conversation model and related logic, replace with CustomerName

internal/services/conversation_service.go

@@ -2,10 +2,7 @@ package services
 
 import (
 	"context"
-	"crypto/md5"
-	"encoding/hex"
 	"encoding/json"
-	"fmt"
 	"log/slog"
 
 	"cs-agent/internal/events"
@@ -61,7 +58,8 @@ func (s *conversationService) ListConversations(userID int64, filter request.Age
 
 	if strs.IsNotBlank(keyword) {
 		keyword = strings.TrimSpace(keyword)
-		cnd.Where("subject LIKE ? OR last_message_summary LIKE ?", "%"+keyword+"%", "%"+keyword+"%")
+		keywordLike := "%" + keyword + "%"
+		cnd.Where("last_message_summary LIKE ? OR customer_id IN (SELECT id FROM t_customer WHERE name LIKE ?)", keywordLike, keywordLike)
 	}
 
 	switch filter {
@@ -103,8 +101,6 @@ func (s *conversationService) getLatestNotFinishedByCustomerID(db *gorm.DB, cust
 }
 
 func (s *conversationService) Create(externalInfo openidentity.ExternalInfo, channelID, aiAgentID int64) (*models.Conversation, error) {
-	subject := s.buildDefaultSubject(externalInfo)
-
 	aiAgent := AIAgentService.Get(aiAgentID)
 	if aiAgent == nil || aiAgent.Status != enums.StatusOk {
 		return nil, errorsx.InvalidParam("AI Agent not found")
@@ -127,7 +123,6 @@ func (s *conversationService) Create(externalInfo openidentity.ExternalInfo, cha
 			AIAgentID:         aiAgentID,
 			ChannelID:         channelID,
 			CustomerID:        customerID,
-			Subject:           subject,
 			Status:            s.resolveInitialStatus(aiAgent.ServiceMode),
 			ServiceMode:       aiAgent.ServiceMode,
 			Priority:          0,
@@ -667,7 +662,10 @@ func (s *conversationService) BuildConversationSummary(conversation *models.Conv
 	if strings.TrimSpace(conversation.LastMessageSummary) != "" {
 		return conversation.LastMessageSummary
 	}
-	return strings.TrimSpace(conversation.Subject)
+	if customer := CustomerService.Get(conversation.CustomerID); customer != nil {
+		return strings.TrimSpace(customer.Name)
+	}
+	return ""
 }
 
 func (s *conversationService) canCloseConversation(conversation *models.Conversation, operator *dto.AuthPrincipal) bool {
@@ -806,22 +804,6 @@ func (s *conversationService) canLinkConversationCustomer(conv *models.Conversat
 	}
 }
 
-func (s *conversationService) buildDefaultSubject(externalInfo openidentity.ExternalInfo) string {
-	if strs.IsNotBlank(externalInfo.ExternalName) {
-		return externalInfo.ExternalName
-	}
-	return fmt.Sprintf("访客%s", hashUUID(externalInfo.ExternalID))
-}
-
-func hashUUID(uuid string) string {
-	if uuid == "" {
-		return "unknown"
-	}
-
-	h := md5.Sum([]byte(uuid))
-	return hex.EncodeToString(h[:])[:8]
-}
-
 func (s *conversationService) resolveInitialStatus(serviceMode enums.IMConversationServiceMode) enums.IMConversationStatus {
 	switch serviceMode {
 	case enums.IMConversationServiceModeHumanOnly:

internal/services/customer_service.go

@@ -1,6 +1,8 @@
 package services
 
 import (
+	"crypto/md5"
+	"encoding/hex"
 	"log/slog"
 
 	"cs-agent/internal/models"
@@ -154,6 +156,15 @@ func buildExternalCustomerName(externalInfo openidentity.ExternalInfo) string {
 	return "访客" + hashUUID(externalInfo.ExternalID)
 }
 
+func hashUUID(uuid string) string {
+	if uuid == "" {
+		return "unknown"
+	}
+
+	h := md5.Sum([]byte(uuid))
+	return hex.EncodeToString(h[:])[:8]
+}
+
 func (s *customerService) CreateCustomer(req request.CreateCustomerRequest, operator *dto.AuthPrincipal) (*models.Customer, error) {
 	if operator == nil {
 		return nil, errorsx.Unauthorized("未登录或登录已过期")

internal/services/event_handlers/conversation_assigned_event_handler.go

@@ -55,7 +55,7 @@ func buildConversationAssignedNotifyBody(conversation *models.Conversation, assi
 	}
 	lines := []string{
 		fmt.Sprintf("会话ID: #%d", conversation.ID),
-		fmt.Sprintf("会话主题: %s", strs.DefaultIfBlank(conversation.Subject, "-")),
+		fmt.Sprintf("会话摘要: %s", strs.DefaultIfBlank(services.ConversationService.BuildConversationSummary(conversation), "-")),
 		fmt.Sprintf("接入渠道: %s", resolveConversationChannelLabel(conversation)),
 		fmt.Sprintf("当前状态: %s", enums.GetIMConversationStatusLabel(conversation.Status)),
 		fmt.Sprintf("处理人: %s", resolveNotifyUserLabel(assigneeID)),

internal/services/ticket_service.go

@@ -852,7 +852,7 @@ func (s *ticketService) CreateFromConversation(req request.CreateTicketFromConve
 	}
 	title := strings.TrimSpace(req.Title)
 	if title == "" {
-		title = strings.TrimSpace(conversation.Subject)
+		title = ConversationService.BuildConversationSummary(conversation)
 	}
 	description := strings.TrimSpace(req.Description)
 	if description == "" {