diff --git a/backend/ai-core/internal/background/thinker.go b/backend/ai-core/internal/background/thinker.go
index d6b166c..202befa 100644
--- a/backend/ai-core/internal/background/thinker.go
+++ b/backend/ai-core/internal/background/thinker.go
@@ -1987,8 +1987,24 @@ func (t *Thinker) storeThought(content string, toolCallsJSON string, toolCallCou
 					t.convStore.AddMessage(pushSessionID, model.LLMMessage{Role: model.RoleAssistant, Content: proactiveMsg})
 				}
 			} else {
-				log.Printf("[后台思考] 推送主动消息: %%s", proactiveMsg)
+				log.Printf("[后台思考] 推送主动消息: %s", proactiveMsg)
 				pusher(t.adminUserID, pushSessionID, proactiveMsg)
+				// 同步推送到 QQ 私聊
+				if platformPusher != nil {
+					t.mu.Lock()
+					channels := t.platformChannels
+					t.mu.Unlock()
+					for _, ch := range channels {
+						if ch.ChannelType == "direct" {
+							uid := strings.TrimPrefix(ch.ChannelID, "private_")
+							target := ProactiveTarget{Platform: ch.AdapterName, ChatType: "private", UserID: uid}
+							if target.Platform == "" { target.Platform = ch.Platform }
+							log.Printf("[后台思考] 同步推送主动消息到平台: %s/%s user=%s", target.Platform, target.ChatType, target.UserID)
+							platformPusher(target, proactiveMsg)
+							break
+						}
+					}
+				}
 				if t.convStore != nil && pushSessionID != "" {
 					t.convStore.AddMessage(pushSessionID, model.LLMMessage{Role: model.RoleAssistant, Content: proactiveMsg})
 				}
diff --git a/backend/ai-core/internal/context/builder.go b/backend/ai-core/internal/context/builder.go
index fd39f82..c779067 100644
--- a/backend/ai-core/internal/context/builder.go
+++ b/backend/ai-core/internal/context/builder.go
@@ -91,7 +91,11 @@ func (cs *ConversationStore) saveToDB(sessionID string, msg model.LLMMessage) {
         sessionID, string(msg.Role), msg.Content, msg.Timestamp,
     )
     if err != nil {
-        logger.Printf("[context] saveToDB insert error: %v", err)
+        logger.Printf("[context] saveToDB insert error: %v (session=%s)", err, sessionID)
+    }
+    // 只对非心跳消息打日志
+    if len(msg.Content) > 5 {
+        logger.Printf("[context] saveToDB ok: session=%s role=%s len=%d", sessionID, msg.Role, len(msg.Content))
     }
 }