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/ws_hub_conn.go

@@ -15,9 +15,9 @@ import (
 	"git.yeij.top/AskaEth/Cyrene_v2/internal/runtime/history"
 )
 
-// wsConn wraps one WebSocket connection. Writes are serialized through the
-// buffered send channel drained by a single writePump, so the gorilla conn is
-// only ever touched by one goroutine at a time.
+// wsConn 包装一个 WebSocket 连接。写入经缓冲的 send
+// 通道串行化，由单个 writePump 排空，因此 gorilla conn
+// 在任一时刻只被一个 goroutine 触碰。
 type wsConn struct {
 	conn   *websocket.Conn
 	send   chan []byte
@@ -27,9 +27,9 @@ type wsConn struct {
 	once   sync.Once
 }
 
-// handleWS upgrades /ws/chat after authenticating the JWT from the query token or
-// the Authorization header. A failed upgrade writes a 401 {error:...} before the
-// handshake, so a browser/IM client sees a clean reject.
+// handleWS 在校验来自查询 token 或 Authorization 头的 JWT 之后
+// 升级 /ws/chat。升级失败会在握手前写出 401 {error:...}，
+// 使浏览器/IM 客户端看到干净的拒绝。
 func (s *Server) handleWS(w http.ResponseWriter, r *http.Request) {
 	if r.Method != http.MethodGet {
 		writeError(w, apperr.Wrap(apperr.ErrBadRequest, "bad_request", "websocket requires GET"))
@@ -59,7 +59,7 @@ func (s *Server) handleWS(w http.ResponseWriter, r *http.Request) {
 	go c.readPump()
 }
 
-// readPump reads client frames until the connection closes, routing each by type.
+// readPump 读取客户端帧直到连接关闭，按类型路由每个帧。
 func (c *wsConn) readPump() {
 	defer func() {
 		c.h.unregister(c)
@@ -87,8 +87,8 @@ func (c *wsConn) readPump() {
 	}
 }
 
-// writePump drains the send channel (and sends keepalive pings) until the
-// connection closes. It is the only writer on the gorilla conn.
+// writePump 排空 send 通道（并发送 keepalive ping）直到
+// 连接关闭。它是 gorilla conn 上唯一的写入者。
 func (c *wsConn) writePump() {
 	ticker := time.NewTicker(wsPingPeriod)
 	defer func() {
@@ -113,7 +113,7 @@ func (c *wsConn) writePump() {
 	}
 }
 
-// publishPublic publishes a bus event without any per-connection reply.
+// publishPublic 发布一个 bus 事件，且不做任何按连接的回复。
 func (c *wsConn) publishPublic(subject string, payload any) {
 	if c.h.bus == nil {
 		return
@@ -121,8 +121,8 @@ func (c *wsConn) publishPublic(subject string, payload any) {
 	_ = c.h.bus.Publish(context.Background(), subject, payload)
 }
 
-// shutdown closes the connection exactly once. It tolerates a nil *websocket.Conn
-// so tests that build a fake connection can rely on a safe teardown.
+// shutdown 恰好关闭连接一次。它容忍 nil 的 *websocket.Conn，
+// 因此构建假连接的测试可以依赖安全的清理。
 func (c *wsConn) shutdown() {
 	c.once.Do(func() {
 		close(c.done)
@@ -132,8 +132,8 @@ func (c *wsConn) shutdown() {
 	})
 }
 
-// enqueue queues a serialized frame, dropping it when a slow client's buffer is
-// full so the producer never blocks.
+// enqueue 把序列化后的帧入队，慢客户端缓冲满时丢弃它，
+// 使生产者绝不阻塞。
 func (c *wsConn) enqueue(b []byte) {
 	select {
 	case c.send <- b:
@@ -141,7 +141,7 @@ func (c *wsConn) enqueue(b []byte) {
 	}
 }
 
-// enqueueJSON serializes ev and queues it.
+// enqueueJSON 序列化 ev 并把它入队。
 func (c *wsConn) enqueueJSON(ev wsEvent) {
 	b, err := json.Marshal(ev)
 	if err != nil {
@@ -151,7 +151,7 @@ func (c *wsConn) enqueueJSON(ev wsEvent) {
 	c.enqueue(b)
 }
 
-// wsToken extracts the JWT from the ?token= query or the Authorization header.
+// wsToken 从 ?token= 查询或 Authorization 头中提取 JWT。
 func wsToken(r *http.Request) string {
 	if t := r.URL.Query().Get("token"); t != "" {
 		return t