feat: 同平台多账号支持 — adapter_name 贯穿全链路

- UnifiedMessage 新增 AdapterName 字段
- router 从适配器 ConfigName() 捕获 adapter 实例名
- forwardToAICore source 新增 adapter_name
- ai-core SetBotUID key 优先用 adapter_name，回退 platform
- 更新优化大纲加入 P4.1

Co-Authored-By: Claude <noreply@anthropic.com>

backend/ai-core/cmd/main.go

@@ -871,7 +871,8 @@ func handleChat(
 				SenderName  string `json:"sender_name"`
 				OriginalUID string `json:"original_uid"`
 				BotUID      string `json:"bot_uid"`
-				GroupName   string `json:"group_name,omitempty"`
+				GroupName   string 
+				AdapterName string `json:"group_name,omitempty"`
 			} `json:"source,omitempty"`
 	}
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
@@ -888,9 +889,18 @@ func handleChat(
 		if thinker != nil {
 			thinker.RecordUserMessage(req.SessionID)
 			if req.Source.Platform != "" && req.Source.BotUID != "" {
-				thinker.SetBotUID(req.Source.Platform, req.Source.BotUID)
+				adapterKey := req.Source.Platform
+			if req.Source.AdapterName != "" {
+				adapterKey = req.Source.AdapterName
+			}
+			thinker.SetBotUID(adapterKey, req.Source.BotUID)
 			}
 			if req.Source.Platform != "" && req.Source.ChannelID != "" {
+				adapterKey := req.Source.Platform
+				if req.Source.AdapterName != "" {
+					adapterKey = req.Source.AdapterName
+				}
+				thinker.SetBotUID(adapterKey, req.Source.BotUID)
 				thinker.AddOrUpdatePlatformChannel(req.Source.Platform, req.Source.ChannelType, req.Source.ChannelID, req.Source.GroupName)
 			}
 		}
@@ -924,7 +934,11 @@ func handleChat(
 	if thinker != nil {
 		thinker.RecordUserMessage(req.SessionID)
 		if req.Source.Platform != "" && req.Source.BotUID != "" {
-			thinker.SetBotUID(req.Source.Platform, req.Source.BotUID)
+			adapterKey := req.Source.Platform
+			if req.Source.AdapterName != "" {
+				adapterKey = req.Source.AdapterName
+			}
+			thinker.SetBotUID(adapterKey, req.Source.BotUID)
 		}
 		if req.Source.Platform != "" && req.Source.ChannelID != "" {
 			thinker.AddOrUpdatePlatformChannel(req.Source.Platform, req.Source.ChannelType, req.Source.ChannelID, req.Source.GroupName)

backend/platform-bridge/cmd/main.go

@@ -665,6 +665,7 @@ func forwardToAICore(cfg *config.Config, msg *bridge.UnifiedMessage, mode, userI
 			"original_uid":  msg.OriginalSenderUID,
 			"bot_uid":       msg.BotUID,
 			"group_name":    msg.GroupName,
+			"adapter_name":  msg.AdapterName,
 		},
 	}
 	if len(images) > 0 {

backend/platform-bridge/internal/bridge/router.go

@@ -150,6 +150,11 @@ func (r *PlatformRouter) RouteMessage(adapterKey string, rawMsg interface{}) (*U
 		unified.BotUID = selfAware.SelfID()
 	}
 
+	// Capture adapter config name for multi-account routing.
+	if named, ok := a.(interface{ ConfigName() string }); ok {
+		unified.AdapterName = named.ConfigName()
+	}
+
 	// Resolve identity (nil for unknown users; caller decides routing).
 	// Use platform type (e.g. "qq") for identity resolution, not adapter key.
 	identity := r.mapper.ResolveOrNil(a.PlatformName(), unified.SenderID)

backend/platform-bridge/internal/bridge/unified.go

@@ -29,6 +29,7 @@ type UnifiedMessage struct {
 	GroupName           string      `json:"group_name,omitempty"`            // resolved group name for group chats
 	OriginalRawMessage  interface{} `json:"-"`                               // preserved for SendMessage wiring
 	BotUID              string      `json:"-"`                               // bot's own platform UID, set by router
+	AdapterName         string      `json:"-"`                               // adapter config name (e.g. "qq-main"), set by router
 }
 
 // Attachment represents a file/image/voice/video attachment.