diff --git a/backend/internal/database/gorm_logger.go b/backend/internal/database/gorm_logger.go
index 8d60c62..5280b2c 100644
--- a/backend/internal/database/gorm_logger.go
+++ b/backend/internal/database/gorm_logger.go
@@ -72,9 +72,12 @@ func (l *structuredGormLogger) Trace(ctx context.Context, begin time.Time, query
 	}
 	elapsed := time.Since(begin)
 	switch {
-	case err != nil && !errors.Is(err, gorm.ErrRecordNotFound) && l.level >= gormLogger.Error:
+	case err != nil && !errors.Is(err, gorm.ErrRecordNotFound) && !errors.Is(err, context.Canceled) && l.level >= gormLogger.Error:
 		sql, rows := query()
 		l.withContext(ctx).Error("数据库查询失败", queryFields(sql, rows, elapsed, err)...)
+	case errors.Is(err, context.Canceled) && l.level >= gormLogger.Info:
+		sql, rows := query()
+		l.withContext(ctx).Debug("数据库查询被客户端取消", queryFields(sql, rows, elapsed, err)...)
 	case elapsed >= l.slowThreshold && l.level >= gormLogger.Warn:
 		sql, rows := query()
 		l.withContext(ctx).Warn("数据库慢查询", queryFields(sql, rows, elapsed, nil)...)
diff --git a/backend/internal/jobs/refundretry/job.go b/backend/internal/jobs/refundretry/job.go
index 1f8fe48..902fac9 100644
--- a/backend/internal/jobs/refundretry/job.go
+++ b/backend/internal/jobs/refundretry/job.go
@@ -123,7 +123,7 @@ func (j *Job) run(ctx context.Context) {
 	if err != nil {
 		j.logger.Warn("退款重试任务扫描缺失退款单失败", zap.Error(err))
 	}
-	if processed > 0 || missing > 0 {
+	if processed > 0 || rebuilt > 0 {
 		j.logger.Info("退款重试任务处理完成",
 			zap.Int("processed", processed),
 			zap.Int("missing_refund_orders", missing),
diff --git a/backend/internal/middleware/request_logger.go b/backend/internal/middleware/request_logger.go
index 9a82241..f3fa8ee 100644
--- a/backend/internal/middleware/request_logger.go
+++ b/backend/internal/middleware/request_logger.go
@@ -1,6 +1,8 @@
 package middleware
 
 import (
+	"context"
+	"errors"
 	"net/http"
 	"strings"
 	"time"
@@ -72,6 +74,10 @@ func RequestLogger(logger *zap.Logger) gin.HandlerFunc {
 		}
 
 		switch {
+		case errors.Is(c.Request.Context().Err(), context.Canceled):
+			if logger.Core().Enabled(zap.DebugLevel) {
+				logger.Debug("HTTP 客户端中断连接", fields...)
+			}
 		case status >= 500:
 			logger.Error("HTTP 请求失败", fields...)
 		case status == http.StatusTooManyRequests:
@@ -113,7 +119,7 @@ func shouldSkipHTTPLog(path, route string, status int, latencyMs float64) bool {
 		return false
 	}
 	// SSE 的请求耗时就是连接存活时间，由 chathub 单独记录连接生命周期。
-	if isChatSSEPath(path, route) {
+	if isSSEPath(path, route) {
 		return true
 	}
 	if latencyMs >= slowRequestThresholdMs {
@@ -122,9 +128,10 @@ func shouldSkipHTTPLog(path, route string, status int, latencyMs float64) bool {
 	return true
 }
 
-func isChatSSEPath(path, route string) bool {
-	return path == "/api/chats/events" || path == "/api/admin/chats/events" ||
-		route == "/api/chats/events" || route == "/api/admin/chats/events"
+func isSSEPath(path, route string) bool {
+	return path == "/api/auth/events" || route == "/api/auth/events" ||
+		path == "/api/chats/events" || route == "/api/chats/events" ||
+		path == "/api/admin/chats/events" || route == "/api/admin/chats/events"
 }
 
 func meaningfulAuthFailure(c *gin.Context) bool {
diff --git a/backend/internal/middleware/request_logger_test.go b/backend/internal/middleware/request_logger_test.go
index 05c859b..e31e100 100644
--- a/backend/internal/middleware/request_logger_test.go
+++ b/backend/internal/middleware/request_logger_test.go
@@ -19,6 +19,7 @@ func TestShouldSkipHTTPLog(t *testing.T) {
 		{name: "轮询 500 不跳过", path: "/api/wallet/balance", status: 500, latencyMs: 1, wantSkip: false},
 		{name: "限流请求不跳过", path: "/api/auth/sms", status: 429, latencyMs: 1, wantSkip: false},
 		{name: "慢请求不跳过", path: "/api/orders", status: 200, latencyMs: 500, wantSkip: false},
+		{name: "用户全局通知 SSE 长连接跳过", path: "/api/auth/events", route: "/api/auth/events", status: 200, latencyMs: 60_000, wantSkip: true},
 		{name: "用户 SSE 长连接跳过", path: "/api/chats/events", route: "/api/chats/events", status: 200, latencyMs: 60_000, wantSkip: true},
 		{name: "后台 SSE 长连接跳过", path: "/api/admin/chats/events", route: "/api/admin/chats/events", status: 200, latencyMs: 600_000, wantSkip: true},
 		{name: "SSE 服务端错误不跳过", path: "/api/admin/chats/events", route: "/api/admin/chats/events", status: 500, latencyMs: 600_000, wantSkip: false},
diff --git a/backend/internal/modules/chat/handler_error.go b/backend/internal/modules/chat/handler_error.go
index 164562c..cf34b8e 100644
--- a/backend/internal/modules/chat/handler_error.go
+++ b/backend/internal/modules/chat/handler_error.go
@@ -1,6 +1,7 @@
 package chat
 
 import (
+	"context"
 	"errors"
 	"net/http"
 
@@ -10,6 +11,9 @@ import (
 )
 
 func writeChatError(c *gin.Context, err error) {
+	if errors.Is(err, context.Canceled) || errors.Is(c.Request.Context().Err(), context.Canceled) {
+		return
+	}
 	response.RecordError(c, err)
 	switch {
 	case errors.Is(err, ErrDependencyUnavailable):
diff --git a/backend/internal/modules/chat/qrcode.go b/backend/internal/modules/chat/qrcode.go
index 23c2e5e..610a87b 100644
--- a/backend/internal/modules/chat/qrcode.go
+++ b/backend/internal/modules/chat/qrcode.go
@@ -23,7 +23,7 @@ const (
 	qrCodeOCRJobURLConfigKey = "integration.paddle_ocr_job_url"
 	qrCodeOCRModelConfigKey  = "integration.paddle_ocr_model"
 	defaultQrCodeOCRJobURL   = "https://paddleocr.aistudio-app.com/api/v2/ocr/jobs"
-	defaultQrCodeOCRModel    = "PaddleOCR-VL-1.6"
+	defaultQrCodeOCRModel    = "PP-OCRv6"
 )
 
 var (
diff --git a/backend/internal/modules/chat/qrcode_ocr.go b/backend/internal/modules/chat/qrcode_ocr.go
index 6e4c225..d7322e9 100644
--- a/backend/internal/modules/chat/qrcode_ocr.go
+++ b/backend/internal/modules/chat/qrcode_ocr.go
@@ -443,6 +443,7 @@ func (r *Repository) submitPaddleOCRJob(ctx context.Context, config *QrCodeOCRCo
 	optionalPayload, _ := json.Marshal(map[string]bool{
 		"useDocOrientationClassify": false,
 		"useDocUnwarping":           false,
+		"useTextlineOrientation":    false,
 		"useChartRecognition":       false,
 	})
 	_ = writer.WriteField("optionalPayload", string(optionalPayload))
@@ -790,13 +791,25 @@ func collectPaddleOCRText(value any, texts *[]string) {
 			collectPaddleOCRText(item, texts)
 		}
 	case map[string]any:
+		// PP-OCRv6: prunedResult.rec_texts 包含检测并识别的文字列表
+		if recTexts, ok := v["rec_texts"].([]any); ok {
+			for _, item := range recTexts {
+				if text, ok := item.(string); ok && strings.TrimSpace(text) != "" {
+					*texts = append(*texts, text)
+				}
+			}
+			return
+		}
+		// PaddleOCR-VL: markdown.text 包含识别文本
 		if markdown, ok := v["markdown"].(map[string]any); ok {
 			if text, ok := markdown["text"].(string); ok && strings.TrimSpace(text) != "" {
 				*texts = append(*texts, text)
 			}
 		}
 		for key, item := range v {
-			if key == "images" || key == "outputImages" {
+			if key == "images" || key == "outputImages" || key == "ocrImage" || key == "inputImage" ||
+				key == "preprocessedImages" || key == "model_settings" || key == "text_det_params" ||
+				key == "logId" || key == "errorCode" || key == "errorMsg" || key == "dataInfo" {
 				continue
 			}
 			collectPaddleOCRText(item, texts)
diff --git a/backend/internal/modules/chat/qrcode_ocr_test.go b/backend/internal/modules/chat/qrcode_ocr_test.go
index 75f02f7..2f6f36e 100644
--- a/backend/internal/modules/chat/qrcode_ocr_test.go
+++ b/backend/internal/modules/chat/qrcode_ocr_test.go
@@ -222,3 +222,20 @@ func pngHeader(width, height uint32) []byte {
 	binary.Write(&result, binary.BigEndian, checksum)
 	return result.Bytes()
 }
+
+func TestCollectPaddleOCRJSONLTextSupportsPPOCRv6(t *testing.T) {
+	rawJSONL := `{"result":{"ocrResults":[{"prunedResult":{"rec_texts":["火爆出租-778群","扫码加入群聊"]},"ocrImage":"https://example.com/ocr.jpg","inputImage":"https://example.com/in.jpg"}]}}`
+	text := collectPaddleOCRJSONLText(rawJSONL)
+	if !strings.Contains(text, "火爆出租-778群") || !strings.Contains(text, "扫码加入群聊") {
+		t.Fatalf("collected text = %q, expected recognized group texts", text)
+	}
+	if strings.Contains(text, "ocr.jpg") || strings.Contains(text, "in.jpg") {
+		t.Fatalf("collected text = %q, should not include image URLs", text)
+	}
+
+	candidates := parseQrCodeGroupNameCandidates(text)
+	if len(candidates) == 0 || candidates[0] != "火爆出租-778群" {
+		t.Fatalf("candidates = %v, want 火爆出租-778群 as first candidate", candidates)
+	}
+}
+
diff --git a/backend/internal/modules/chat/support.go b/backend/internal/modules/chat/support.go
index f6bb0ef..7e1a761 100644
--- a/backend/internal/modules/chat/support.go
+++ b/backend/internal/modules/chat/support.go
@@ -229,6 +229,7 @@ func (r *Repository) listAdminConversations(ctx context.Context, principal Princ
 	var rows []conversationRow
 	offset := (page - 1) * pageSize
 	queryDB := r.adminConversationBase(ctx, principal, keyword).
+		Joins("LEFT JOIN chat_messages AS lm ON lm.id = c.last_message_id").
 		Select(`c.id, c.order_id, c.listing_id, c.type, c.support_scene, c.title, c.status, c.last_message_id,
 			c.last_message_preview, c.last_message_at, c.created_at, c.updated_at,
 			COALESCE(cp_me.role, 'admin') AS role,
@@ -302,7 +303,6 @@ func (r *Repository) adminConversationBase(ctx context.Context, principal Princi
 	db := r.db.WithContext(ctx).Table("chat_conversations AS c").
 		Joins("LEFT JOIN chat_participants AS cp_me ON cp_me.conversation_id = c.id AND cp_me.participant_type = ? AND cp_me.participant_id = ?", principal.Type, principal.ID).
 		Joins("LEFT JOIN chat_admin_conversation_states AS cas ON cas.conversation_id = c.id AND cas.admin_user_id = ?", principal.ID).
-		Joins("LEFT JOIN chat_messages AS lm ON lm.id = c.last_message_id").
 		Joins("LEFT JOIN rental_orders AS explicit_lo ON explicit_lo.id = c.order_id").
 		Joins("LEFT JOIN rental_listings AS l ON l.id = COALESCE(explicit_lo.listing_id, c.listing_id)")
 	if keyword != "" {
diff --git a/backend/internal/modules/systemconfig/repository.go b/backend/internal/modules/systemconfig/repository.go
index 954b0c6..0dff82b 100644
--- a/backend/internal/modules/systemconfig/repository.go
+++ b/backend/internal/modules/systemconfig/repository.go
@@ -47,7 +47,7 @@ var defaultConfigs = []defaultConfig{
 	{Key: "chat.renter_retention_days_after_order_end", Value: "5", Description: "订单结束后租客保留在发布群的天数（3-7）"},
 	{Key: "integration.paddle_ocr_token", Value: "", Description: "PaddleOCR API Token，用于二维码群名自动识别"},
 	{Key: "integration.paddle_ocr_job_url", Value: "https://paddleocr.aistudio-app.com/api/v2/ocr/jobs", Description: "PaddleOCR 异步任务接口地址"},
-	{Key: "integration.paddle_ocr_model", Value: "PaddleOCR-VL-1.6", Description: "PaddleOCR 识别模型"},
+	{Key: "integration.paddle_ocr_model", Value: "PP-OCRv6", Description: "PaddleOCR 识别模型（默认 PP-OCRv6，支持 PaddleOCR-VL-1.6 等）"},
 	{Key: homeAnnouncementsConfigKey, Value: defaultHomeAnnouncementsConfigValue(), Description: "移动端首页公告 JSON 数组"},
 	{Key: homeBannersConfigKey, Value: defaultHomeBannersConfigValue(), Description: "移动端首页轮播图 JSON 数组"},
 	{Key: awRecycleConfigKey, Value: defaultAWRecycleConfigValue(), Description: "首页 AW炫彩回收入口配置 JSON（标题/副标题/展示图片）"},
diff --git a/backend/migrations/000065_default_paddle_ocr_model_v6.sql b/backend/migrations/000065_default_paddle_ocr_model_v6.sql
new file mode 100644
index 0000000..53a70a3
--- /dev/null
+++ b/backend/migrations/000065_default_paddle_ocr_model_v6.sql
@@ -0,0 +1,13 @@
+-- +goose Up
+-- +goose StatementBegin
+UPDATE system_configs
+SET value = 'PP-OCRv6', description = 'PaddleOCR 识别模型（默认 PP-OCRv6，支持 PaddleOCR-VL-1.6 等）'
+WHERE `key` = 'integration.paddle_ocr_model' AND (value = 'PaddleOCR-VL-1.6' OR value = '' OR value IS NULL);
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+UPDATE system_configs
+SET value = 'PaddleOCR-VL-1.6', description = 'PaddleOCR 识别模型'
+WHERE `key` = 'integration.paddle_ocr_model' AND value = 'PP-OCRv6';
+-- +goose StatementEnd
diff --git a/backend/pkg/response/response.go b/backend/pkg/response/response.go
index f173a2e..62ed6d1 100644
--- a/backend/pkg/response/response.go
+++ b/backend/pkg/response/response.go
@@ -1,6 +1,7 @@
 package response
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"net/http"
@@ -45,7 +46,7 @@ func Error(c *gin.Context, status int, code, message string) {
 
 // RecordError 保存原始错误，供统一请求日志记录服务端故障原因。
 func RecordError(c *gin.Context, err error) {
-	if c == nil || err == nil {
+	if c == nil || err == nil || errors.Is(err, context.Canceled) {
 		return
 	}
 	for _, item := range c.Errors {
diff --git a/frontend/src/features/admin/views/AdminSystemConfigsView.vue b/frontend/src/features/admin/views/AdminSystemConfigsView.vue
index efcaf4b..9273f7c 100644
--- a/frontend/src/features/admin/views/AdminSystemConfigsView.vue
+++ b/frontend/src/features/admin/views/AdminSystemConfigsView.vue
@@ -145,7 +145,7 @@ const paddleOcrJobUrlConfig = computed(() =>
   )
 )
 const paddleOcrModelConfig = computed(() =>
-  systemConfigByKey('integration.paddle_ocr_model', 'PaddleOCR-VL-1.6', 'PaddleOCR 识别模型')
+  systemConfigByKey('integration.paddle_ocr_model', 'PP-OCRv6', 'PaddleOCR 识别模型')
 )
 
 const regularConfigs = computed(() =>
diff --git a/frontend/src/shared/utils/systemConfigOptions.ts b/frontend/src/shared/utils/systemConfigOptions.ts
index 3bc1851..675b4ca 100644
--- a/frontend/src/shared/utils/systemConfigOptions.ts
+++ b/frontend/src/shared/utils/systemConfigOptions.ts
@@ -58,7 +58,10 @@ export const systemConfigSelectOptions: Record<string, SystemConfigOption[]> = {
     { label: '5 天', value: '5' },
     { label: '7 天', value: '7' },
   ],
-  'integration.paddle_ocr_model': [{ label: 'PaddleOCR-VL-1.6', value: 'PaddleOCR-VL-1.6' }],
+  'integration.paddle_ocr_model': [
+    { label: 'PP-OCRv6（推荐，低延迟少排队）', value: 'PP-OCRv6' },
+    { label: 'PaddleOCR-VL-1.6', value: 'PaddleOCR-VL-1.6' },
+  ],
 }
 
 export function getSystemConfigSelectOptions(key: string) {