docs(gateway): gateway 剩余文件注释改中文（逐行 1:1，代码零字节改动）

主人 2026-10-03 拍板「注释一律中文」；gateway 至此整包注释中文化完成（本会话共 3 批：
已推库 16 个文件 + 本批剩余文件）。
校验：机械校验（非注释改动行）= 空；剥注释后代码文本逐行比对全等（不一致文件数 0）；
全树 go test ./... 58 包 ok / 0 FAIL；交叉编译绿。

internal/services/gateway/proactive.go

@@ -10,14 +10,14 @@ import (
 	"git.yeij.top/AskaEth/Cyrene_v2/internal/channel/adapter"
 )
 
-// wsProactiveMessage is the WS event type for an autonomous proactive push
-// (design/12 §3): a message Cyrene decided to send without a recent user input.
+// wsProactiveMessage 是自主主动推送的 WS 事件类型
+// （design/12 §3）：Cyrene 在没有近期用户输入时决定发送的消息。
 const wsProactiveMessage = "proactive_message"
 
-// proactivePayload is the sanitized wire shape of a proactive message. It carries
-// only the fields a client needs to render a bubble (content, platform, channel,
-// sender label); it deliberately omits RawData / media bytes / tokens so a
-// proactive push can never leak a credential or payload into the frontend.
+// proactivePayload 是主动消息消毒后的线上结构。它只
+// 携带客户端渲染气泡所需的字段（content、platform、channel、
+// 发送者标签）；它刻意省略 RawData / 媒体字节 / token，使
+// 主动推送绝不可能把凭据或载荷泄露进前端。
 type proactivePayload struct {
 	Platform    string    `json:"platform,omitempty"`
 	ChannelID   string    `json:"channelId,omitempty"`
@@ -29,12 +29,12 @@ type proactivePayload struct {
 	MessageID   string    `json:"messageId,omitempty"`
 }
 
-// SendProactive delivers msg to every live owner/admin connection and returns how
-// many accepted it. A zero count means no owner/admin client is online, so the
-// caller falls back to the IM bridge. Only owner/admin connections are targeted
-// (red line: proactive is owner-only); a viewer or unauthenticated connection is
-// never reached. It never blocks: a full send buffer drops the frame for that
-// slow client rather than stalling the backthink push.
+// SendProactive 把 msg 投递给每个存活的 owner/admin 连接，并返回
+// 有多少个接受了它。计数为零意味着没有 owner/admin 客户端在线，
+// 因此调用方回退到 IM bridge。只有 owner/admin 连接会被作为
+// 目标（红线：主动推送仅 owner）；viewer 或未认证连接
+// 绝不被触达。它绝不阻塞：发送缓冲满时对该
+// 慢客户端丢弃该帧，而不是卡住后台思考推送。
 func (h *hub) SendProactive(ctx context.Context, msg adapter.UnifiedMessage) (int, error) {
 	if err := ctx.Err(); err != nil {
 		return 0, err
@@ -59,13 +59,13 @@ func (h *hub) SendProactive(ctx context.Context, msg adapter.UnifiedMessage) (in
 	return n, nil
 }
 
-// Server.SendProactive satisfies the backthink ActiveClient seam by delegating to
-// the hub, so the composition root can hand the gateway itself to the sink setter.
+// Server.SendProactive 通过委托给 hub 满足后台思考的 ActiveClient
+// 接缝，因此组合根能把网关自身交给汇聚点设置器。
 func (s *Server) SendProactive(ctx context.Context, msg adapter.UnifiedMessage) (int, error) {
 	return s.hub.SendProactive(ctx, msg)
 }
 
-// proactivePayloadFrom projects a UnifiedMessage into the sanitized wire payload.
+// proactivePayloadFrom 把 UnifiedMessage 投影为消毒后的线上载荷。
 func proactivePayloadFrom(msg adapter.UnifiedMessage) proactivePayload {
 	return proactivePayload{
 		Platform:    msg.Platform,
@@ -79,8 +79,8 @@ func proactivePayloadFrom(msg adapter.UnifiedMessage) proactivePayload {
 	}
 }
 
-// ownerAdminClaims reports whether claims authorize a proactive push (owner or
-// admin). Nil claims (unauth / bare test connections) are never targeted.
+// ownerAdminClaims 报告 claims 是否授权一次主动推送（owner 或
+// admin）。nil claims（未认证 / 裸测试连接）绝不被作为目标。
 func ownerAdminClaims(claims *auth.Claims) bool {
 	if claims == nil {
 		return false