Refactor localization strings to English across various services and UI components

- Updated titles and subtitles in channel_service.go for web channel and WeChat MP channel configurations.
- Changed handoff messages in conversation_human_dispatch_service.go to English.
- Modified notification messages in event handlers for ticket and conversation assignments to English.
- Adjusted ticket creation messages in ticket_service.go to reflect English localization.
- Updated default locale settings in i18n configuration files to English (en-US).
- Changed HTML language attribute in layout.tsx to English.
- Refactored widget locale detection logic in agent-desk-sdk.ts to prioritize English.

internal/services/channel_service.go

@@ -208,8 +208,8 @@ func (s *channelService) ListWxWorkKFAccounts() ([]response.WxWorkKFAccountRespo
 func (s *channelService) ParseWebChannelConfig(raw string) (*dto.WebChannelConfig, error) {
 	raw = strings.TrimSpace(raw)
 	cfg := &dto.WebChannelConfig{
-		Title:      "在线客服",
-		Subtitle:   "欢迎咨询",
+		Title:      "Support",
+		Subtitle:   "How can we help?",
 		ThemeColor: "#2563eb",
 		Position:   "right",
 		Width:      "380px",
@@ -221,7 +221,7 @@ func (s *channelService) ParseWebChannelConfig(raw string) (*dto.WebChannelConfi
 	}
 	cfg.Title = strings.TrimSpace(cfg.Title)
 	if cfg.Title == "" {
-		cfg.Title = "在线客服"
+		cfg.Title = "Support"
 	}
 	cfg.Subtitle = strings.TrimSpace(cfg.Subtitle)
 	cfg.ThemeColor = strings.TrimSpace(cfg.ThemeColor)
@@ -246,8 +246,8 @@ func (s *channelService) ParseWebChannelConfig(raw string) (*dto.WebChannelConfi
 func (s *channelService) ParseWechatMPChannelConfig(raw string) (*dto.WechatMPChannelConfig, error) {
 	raw = strings.TrimSpace(raw)
 	cfg := &dto.WechatMPChannelConfig{
-		Title:      "公众号客服",
-		Subtitle:   "欢迎咨询",
+		Title:      "Official Account Support",
+		Subtitle:   "How can we help?",
 		ThemeColor: "#2563eb",
 	}
 	if raw != "" {
@@ -257,7 +257,7 @@ func (s *channelService) ParseWechatMPChannelConfig(raw string) (*dto.WechatMPCh
 	}
 	cfg.Title = strings.TrimSpace(cfg.Title)
 	if cfg.Title == "" {
-		cfg.Title = "公众号客服"
+		cfg.Title = "Official Account Support"
 	}
 	cfg.Subtitle = strings.TrimSpace(cfg.Subtitle)
 	cfg.ThemeColor = strings.TrimSpace(cfg.ThemeColor)

internal/services/conversation_human_dispatch_service.go

@@ -19,8 +19,8 @@ import (
 var ConversationHumanDispatchService = newConversationHumanDispatchService()
 
 const (
-	HandoffWaitingMessage  = "已为你转接人工客服，请稍候。"
-	HandoffOffHoursMessage = "当前暂不在人工客服服务时间内，你可以先继续描述问题，我会尽力协助；服务时间开始后也可以再次转人工。"
+	HandoffWaitingMessage  = "We are connecting you to a human support agent. Please wait."
+	HandoffOffHoursMessage = "Human support is currently outside service hours. You can keep describing the issue and I will do my best to help. You can also request a human agent again when service hours resume."
 )
 
 type HandoffDecisionType string

internal/services/conversation_human_dispatch_service_test.go

@@ -42,7 +42,7 @@ func TestConversationHumanDispatchAIHandoffOffHoursKeepsAIServingAndSendsNotice(
 	if message == nil {
 		t.Fatalf("expected off-hours notice message")
 	}
-	if message.SenderType != enums.IMSenderTypeAI || !strings.Contains(message.Content, "当前暂不在人工客服服务时间内") {
+	if message.SenderType != enums.IMSenderTypeAI || !strings.Contains(message.Content, "Human support is currently outside service hours") {
 		t.Fatalf("unexpected off-hours message: %+v", message)
 	}
 }

internal/services/event_handlers/conversation_assigned_event_handler.go

@@ -37,11 +37,11 @@ func handleConversationAssignedNotify(ctx context.Context, event events.Conversa
 func conversationAssignedNotifyTitle(assignType string) string {
 	switch strings.TrimSpace(assignType) {
 	case events.ConversationAssignTypeTransfer:
-		return "会话转接提醒"
+		return "Conversation transferred"
 	case events.ConversationAssignTypeAutoAssign:
-		return "会话自动分配提醒"
+		return "Conversation auto-assigned"
 	default:
-		return "会话分配提醒"
+		return "Conversation assigned"
 	}
 }
 
@@ -49,21 +49,21 @@ func buildConversationAssignedNotifyBody(conversation *models.Conversation, assi
 	if conversation == nil {
 		return ""
 	}
-	reasonLabel := "分配原因"
+	reasonLabel := "Assignment reason"
 	if strings.TrimSpace(assignType) == events.ConversationAssignTypeTransfer {
-		reasonLabel = "转接原因"
+		reasonLabel = "Transfer reason"
 	}
 	lines := []string{
-		fmt.Sprintf("会话ID: #%d", conversation.ID),
-		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)),
+		fmt.Sprintf("Conversation ID: #%d", conversation.ID),
+		fmt.Sprintf("Summary: %s", strs.DefaultIfBlank(services.ConversationService.BuildConversationSummary(conversation), "-")),
+		fmt.Sprintf("Channel: %s", resolveConversationChannelLabel(conversation)),
+		fmt.Sprintf("Status: %s", enums.GetIMConversationStatusLabel(conversation.Status)),
+		fmt.Sprintf("Assignee: %s", resolveNotifyUserLabel(assigneeID)),
 	}
 	if strings.TrimSpace(reason) != "" {
 		lines = append(lines, fmt.Sprintf("%s: %s", reasonLabel, strings.TrimSpace(reason)))
 	}
-	lines = append(lines, fmt.Sprintf("时间: %s", time.Now().Format("2006-01-02 15:04:05")))
+	lines = append(lines, fmt.Sprintf("Time: %s", time.Now().Format("2006-01-02 15:04:05")))
 	return strings.Join(lines, "\n")
 }
 

internal/services/event_handlers/notification_event_handler.go

@@ -31,16 +31,16 @@ func handleTicketAssignedInAppNotification(ctx context.Context, event events.Tic
 	if ticket == nil {
 		return nil
 	}
-	content := fmt.Sprintf("工单 %s 已指派给你", strs.DefaultIfBlank(ticket.TicketNo, fmt.Sprintf("#%d", ticket.ID)))
+	content := fmt.Sprintf("Ticket %s has been assigned to you.", strs.DefaultIfBlank(ticket.TicketNo, fmt.Sprintf("#%d", ticket.ID)))
 	if title := strings.TrimSpace(ticket.Title); title != "" {
 		content = content + "\n" + title
 	}
 	if reason := strings.TrimSpace(event.Reason); reason != "" {
-		content = content + "\n指派原因: " + reason
+		content = content + "\nAssignment reason: " + reason
 	}
 	_, err := services.NotificationService.CreateAndPush(request.CreateNotificationRequest{
 		RecipientUserID:  event.ToUserID,
-		Title:            "工单指派提醒",
+		Title:            "Ticket assigned",
 		Content:          content,
 		NotificationType: "ticket_assigned",
 		BizType:          "ticket",
@@ -61,12 +61,12 @@ func handleConversationAssignedInAppNotification(ctx context.Context, event even
 	if conversation == nil {
 		return nil
 	}
-	content := fmt.Sprintf("会话 #%d 已分配给你", conversation.ID)
+	content := fmt.Sprintf("Conversation #%d has been assigned to you.", conversation.ID)
 	if summary := strings.TrimSpace(services.ConversationService.BuildConversationSummary(conversation)); summary != "" {
 		content = content + "\n" + summary
 	}
 	if reason := strings.TrimSpace(event.Reason); reason != "" {
-		content = content + "\n分配原因: " + reason
+		content = content + "\nAssignment reason: " + reason
 	}
 	_, err := services.NotificationService.CreateAndPush(request.CreateNotificationRequest{
 		RecipientUserID:  event.ToUserID,

internal/services/event_handlers/ticket_assigned_event_handler.go

@@ -29,7 +29,7 @@ func handleTicketAssignedNotify(ctx context.Context, event events.TicketAssigned
 		return nil
 	}
 	content := buildTicketAssignedNotifyBody(ticket, event.ToUserID, event.Reason)
-	return services.WxWorkNotifyService.SendTextToAssigneeOrDefault(event.ToUserID, "工单指派提醒", content)
+	return services.WxWorkNotifyService.SendTextToAssigneeOrDefault(event.ToUserID, "Ticket assigned", content)
 }
 
 func buildTicketAssignedNotifyBody(ticket *models.Ticket, assigneeID int64, reason string) string {
@@ -37,14 +37,14 @@ func buildTicketAssignedNotifyBody(ticket *models.Ticket, assigneeID int64, reas
 		return ""
 	}
 	lines := []string{
-		fmt.Sprintf("工单号: %s", strs.DefaultIfBlank(ticket.TicketNo, fmt.Sprintf("#%d", ticket.ID))),
-		fmt.Sprintf("工单标题: %s", strs.DefaultIfBlank(ticket.Title, "-")),
-		fmt.Sprintf("当前状态: %s", enums.GetTicketStatusLabel(ticket.Status)),
-		fmt.Sprintf("处理人: %s", resolveNotifyUserLabel(assigneeID)),
+		fmt.Sprintf("Ticket no: %s", strs.DefaultIfBlank(ticket.TicketNo, fmt.Sprintf("#%d", ticket.ID))),
+		fmt.Sprintf("Title: %s", strs.DefaultIfBlank(ticket.Title, "-")),
+		fmt.Sprintf("Status: %s", enums.GetTicketStatusLabel(ticket.Status)),
+		fmt.Sprintf("Assignee: %s", resolveNotifyUserLabel(assigneeID)),
 	}
 	if strings.TrimSpace(reason) != "" {
-		lines = append(lines, fmt.Sprintf("指派原因: %s", strings.TrimSpace(reason)))
+		lines = append(lines, fmt.Sprintf("Assignment reason: %s", strings.TrimSpace(reason)))
 	}
-	lines = append(lines, fmt.Sprintf("时间: %s", time.Now().Format("2006-01-02 15:04:05")))
+	lines = append(lines, fmt.Sprintf("Time: %s", time.Now().Format("2006-01-02 15:04:05")))
 	return strings.Join(lines, "\n")
 }

internal/services/ticket_service.go

@@ -237,7 +237,7 @@ func (s *ticketService) CreateTicket(req request.CreateTicketRequest, operator *
 		}
 		return repositories.TicketProgressRepository.Create(ctx.Tx, &models.TicketProgress{
 			TicketID:  ticket.ID,
-			Content:   "创建工单",
+			Content:   "Created ticket",
 			AuthorID:  operator.UserID,
 			CreatedAt: time.Now(),
 		})
@@ -265,7 +265,7 @@ func (s *ticketService) CreateFromConversation(req request.CreateTicketFromConve
 		title = strings.TrimSpace(ConversationService.BuildConversationSummary(conversation))
 	}
 	if title == "" {
-		title = "会话工单"
+		title = "Conversation ticket"
 	}
 	description := strings.TrimSpace(req.Description)
 	if description == "" {

internal/services/ticket_service_test.go

@@ -81,7 +81,7 @@ func TestTicketServiceCreateTicketSetsPendingStatusAndTicketNo(t *testing.T) {
 	if len(progresses) != 1 {
 		t.Fatalf("expected initial progress, got %d", len(progresses))
 	}
-	if progresses[0].Content != "创建工单" || progresses[0].AuthorID != operator.UserID {
+	if progresses[0].Content != "Created ticket" || progresses[0].AuthorID != operator.UserID {
 		t.Fatalf("unexpected initial progress: %+v", progresses[0])
 	}
 

internal/services/tool_catalog_service.go

@@ -34,7 +34,7 @@ type MCPToolCatalogItem struct {
 }
 
 func (s *toolCatalogService) ListMCPTools(ctx context.Context) ([]MCPToolCatalogItem, error) {
-	return s.ListMCPToolsWithLocale(ctx, i18nx.LocaleZhCN)
+	return s.ListMCPToolsWithLocale(ctx, i18nx.DefaultLocale)
 }
 
 func (s *toolCatalogService) ListMCPToolsWithLocale(ctx context.Context, locale string) ([]MCPToolCatalogItem, error) {