feat(channels): 管理面板消息日志——chat_messages 加 adapter_id + 配置级/平台/总览三粒度端点

后端：
- 迁移 0007：chat_messages 加 adapter_id 列 + 索引
- history.Message 加 AdapterID；persistToMain/persistIsolated 传适配器名(a.Name())
- channelbridge: 4 个持久化点 + registerSilenced 传 a；light.go registerSilenced 签名加 a
- Store 新增 ListAdapterLog(?adapter=, 不排除主会话)/ListAllLog(adapter_id!='', 总览)；ListPlatformLog 保留
- 新端点 GET /api/v1/admin/channels/messages：?adapter= 配置级 / ?platform= 平台 / 无参=总览，historyMessage 加 adapterId
- 测试：ListAdapterLog/ListAllLog 过滤用例 + 端点粒度用例 + 桥接持久化断言

前端：渠道管理每配置(账号)「消息日志」按钮 + 页顶「适配器总览日志」入口 + ChannelLogPanel 弹窗(总览/配置级)，Miuix 风格，build 绿。

internal/services/gateway/history.go

@@ -38,6 +38,10 @@ type historyMessage struct {
 	// message (group/stranger, design/16 §4.6). It is blank for the owner's
 	// private chat on the main session, so empty means "labeled as the owner".
 	SenderName string `json:"senderName,omitempty"`
+	// AdapterID is the adapter (platform + account) registration name of the IM
+	// source that produced the message (e.g. "kook:3bef..."). It is blank for
+	// Web-originated messages.
+	AdapterID string `json:"adapterId,omitempty"`
 	CreatedAt  int64  `json:"createdAt"`
 }
 
@@ -175,8 +179,62 @@ func (s *Server) handleChannelPlatformLog(w http.ResponseWriter, r *http.Request
 	writeJSON(w, http.StatusOK, out)
 }
 
-// handleDeleteSession deletes a sub session and all its messages. The main session is
-// immutable (design/16 §6) and returns 403.
+// handleChannelMessages returns up to limit messages for the admin adapter log page,
+// newest first, across one of three granularities (design/16 §4.6 §4): a single
+// adapter config (?adapter=kook:3bef...), a whole platform (?platform=kook), or the
+// full IM adapter overview (neither, so adapter_id != ''). before/limit reuse the
+// standard cursor pagination. The owner-private mirror on the main web session is
+// NOT excluded here because it carries the adapter_id; each granularity filters on
+// adapter_id / platform directly.
+func (s *Server) handleChannelMessages(w http.ResponseWriter, r *http.Request) {
+	if s.history == nil {
+		writeError(w, &apperr.AppError{Code: "not_implemented", Message: "会话历史服务未配置（未注入 HistoryStore）", HTTPCode: http.StatusNotImplemented})
+		return
+	}
+	limitStr := r.URL.Query().Get("limit")
+	limit := historyDefaultLimit
+	if limitStr != "" {
+		v, err := strconv.Atoi(limitStr)
+		if err != nil || v < 1 {
+			writeError(w, apperr.Wrap(apperr.ErrBadRequest, "bad_request", "invalid limit"))
+			return
+		}
+		limit = v
+	}
+	var before int64
+	if b := r.URL.Query().Get("before"); b != "" {
+		v, err := strconv.ParseInt(b, 10, 64)
+		if err != nil {
+			writeError(w, apperr.Wrap(apperr.ErrBadRequest, "bad_request", "invalid before"))
+			return
+		}
+		before = v
+	}
+
+	adapter := r.URL.Query().Get("adapter")
+	platform := r.URL.Query().Get("platform")
+
+	var msgs []history.Message
+	var err error
+	switch {
+	case adapter != "":
+		msgs, err = s.history.ListAdapterLog(r.Context(), adapter, before, limit)
+	case platform != "":
+		msgs, err = s.history.ListPlatformLog(r.Context(), platform, before, limit)
+	default:
+		msgs, err = s.history.ListAllLog(r.Context(), before, limit)
+	}
+	if err != nil {
+		s.log.Error("history channel messages", "err", err, "adapter", adapter, "platform", platform)
+		writeError(w, apperr.Wrap(apperr.ErrInternal, "channel_messages_failed", "failed to list channel messages"))
+		return
+	}
+	out := make([]historyMessage, 0, len(msgs))
+	for _, m := range msgs {
+		out = append(out, toHistoryMessage(m))
+	}
+	writeJSON(w, http.StatusOK, out)
+}
 func (s *Server) handleDeleteSession(w http.ResponseWriter, r *http.Request) {
 	if s.history == nil {
 		writeError(w, &apperr.AppError{Code: "not_implemented", Message: "会话历史服务未配置（未注入 HistoryStore）", HTTPCode: http.StatusNotImplemented})
@@ -213,6 +271,7 @@ func toHistoryMessage(m history.Message) historyMessage {
 		Platform:   m.Platform,
 		DeviceID:   m.DeviceID,
 		SenderName: m.SenderName,
+		AdapterID:  m.AdapterID,
 		CreatedAt:  m.CreatedAt,
 	}
 }