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/server.go

@@ -115,6 +115,8 @@ type HistoryStore interface {
 	List(ctx context.Context, sessionID string, before int64, limit int, platform string) ([]history.Message, error)
 	Recent(ctx context.Context, sessionID string, n int) ([]history.Message, error)
 	ListPlatformLog(ctx context.Context, platform string, before int64, limit int) ([]history.Message, error)
+	ListAdapterLog(ctx context.Context, adapterID string, before int64, limit int) ([]history.Message, error)
+	ListAllLog(ctx context.Context, before int64, limit int) ([]history.Message, error)
 	DeleteSession(ctx context.Context, sessionID string) error
 	NewSubSession(ctx context.Context, ownerID string) (string, error)
 	ListSessions(ctx context.Context) ([]history.SessionMeta, error)
@@ -380,6 +382,7 @@ func (s *Server) Handler() http.Handler {
 	mux.Handle("GET /api/v1/admin/memories", adminAuth(http.HandlerFunc(s.adminListMemories)))
 	mux.Handle("GET /api/v1/admin/plugins", adminAuth(http.HandlerFunc(s.adminListPlugins)))
 	mux.Handle("GET /api/v1/admin/channels", adminAuth(http.HandlerFunc(s.adminListChannels)))
+	mux.Handle("GET /api/v1/admin/channels/messages", adminAuth(http.HandlerFunc(s.handleChannelMessages)))
 	mux.Handle("GET /api/v1/admin/channels/{platform}/messages", adminAuth(http.HandlerFunc(s.handleChannelPlatformLog)))
 	mux.Handle("GET /api/v1/admin/iot", adminAuth(http.HandlerFunc(s.adminListIoT)))
 	mux.Handle("GET /api/v1/admin/llm", adminAuth(http.HandlerFunc(s.adminGetLlm)))