diff --git a/cmd/server/main.go b/cmd/server/main.go
index 43b2832..ae9e7cc 100644
--- a/cmd/server/main.go
+++ b/cmd/server/main.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"fmt"
 	"os"
 	"os/signal"
 	"syscall"
@@ -14,9 +15,8 @@ func main() {
 	// 初始化应用程序（Wire 自动生成）
 	app, err := InitializeApp()
 	if err != nil {
-		zap.L().Fatal("failed to initialize app",
-			zap.Error(err),
-		)
+		fmt.Fprintf(os.Stderr, "failed to initialize app: %v\n", err)
+		os.Exit(1)
 	}
 
 	// 启动应用程序
diff --git a/internal/handler/message_handler.go b/internal/handler/message_handler.go
index ac1da27..869560f 100644
--- a/internal/handler/message_handler.go
+++ b/internal/handler/message_handler.go
@@ -244,6 +244,12 @@ func (h *MessageHandler) GetConversationByID(c *gin.Context) {
 
 	// 获取对方用户的已读位置
 	otherLastReadSeq := int64(0)
+	for _, p := range allParticipants {
+		if p.UserID != userID {
+			otherLastReadSeq = p.LastReadSeq
+			break
+		}
+	}
 	response.Success(c, dto.ConvertConversationToDetailResponse(conv, participants, unreadCount, nil, myLastReadSeq, otherLastReadSeq, isPinned, notificationMuted))
 }
 
@@ -768,6 +774,12 @@ func (h *MessageHandler) HandleGetConversation(c *gin.Context) {
 
 	// 获取对方用户的已读位置
 	otherLastReadSeq := int64(0)
+	for _, p := range allParticipants {
+		if p.UserID != userID {
+			otherLastReadSeq = p.LastReadSeq
+			break
+		}
+	}
 	response.Success(c, dto.ConvertConversationToDetailResponse(conv, participants, unreadCount, nil, myLastReadSeq, otherLastReadSeq, isPinned, notificationMuted))
 }
 
diff --git a/internal/handler/verification_handler.go b/internal/handler/verification_handler.go
index 969a3a2..3d98220 100644
--- a/internal/handler/verification_handler.go
+++ b/internal/handler/verification_handler.go
@@ -6,6 +6,7 @@ import (
 	"with_you/internal/dto"
 	"with_you/internal/model"
 	"with_you/internal/pkg/response"
+	"with_you/internal/pkg/sanitizer"
 	"with_you/internal/service"
 
 	"github.com/gin-gonic/gin"
@@ -114,7 +115,7 @@ func convertVerificationRecordToResponse(record *model.VerificationRecord) *dto.
 		UserID:         record.UserID,
 		Identity:       string(record.Identity),
 		Status:         string(record.Status),
-		RealName:       record.RealName,
+		RealName:       sanitizer.MaskValue("real_name", record.RealName),
 		StudentID:      record.StudentID,
 		EmployeeID:     record.EmployeeID,
 		Department:     record.Department,
diff --git a/internal/repository/message_repo.go b/internal/repository/message_repo.go
index 9bb7ec8..7fc344e 100644
--- a/internal/repository/message_repo.go
+++ b/internal/repository/message_repo.go
@@ -896,10 +896,11 @@ func (r *messageRepository) GetUnreadCountBatch(ctx context.Context, userID stri
 	}
 	var rows []row
 	err := r.db.WithContext(ctx).
-		Table("conversation_participants cp").
-		Select("cp.conversation_id, COALESCE(cnt.unread, 0) as count").
-		Joins("LEFT JOIN (SELECT m.conversation_id, COUNT(m.id) as unread FROM messages m WHERE m.sender_id <> ? AND m.deleted_at IS NULL AND m.conversation_id IN (?) GROUP BY m.conversation_id) cnt ON cnt.conversation_id = cp.conversation_id AND cnt.unread > cp.last_read_seq", userID, convIDs).
-		Where("cp.user_id = ? AND cp.conversation_id IN (?)", userID, convIDs).
+		Table("messages m").
+		Select("m.conversation_id, COUNT(m.id) as count").
+		Joins("JOIN conversation_participants cp ON cp.conversation_id = m.conversation_id AND cp.user_id = ?", userID).
+		Where("m.sender_id <> ? AND m.deleted_at IS NULL AND m.seq > cp.last_read_seq AND m.conversation_id IN (?)", userID, convIDs).
+		Group("m.conversation_id").
 		Scan(&rows).Error
 	if err != nil {
 		return nil, err