docs(comments): 注释中文化 · internal/services/channelbridge（纯替换）

- 只翻注释/文档字符串：剥掉注释后代码行逐字节不变（机械校验只剩允许的行尾注释形态）
- 术语对齐既有译法（owner→主人、persona→角色、engage→参与度判定、quiet hours→安静时段、backoff→退避）
- 复核：go build 绿 + channelbridge 包测试绿；gofmt 干净

internal/services/channelbridge/helpers.go

@@ -6,12 +6,12 @@ import (
 	"git.yeij.top/AskaEth/Cyrene_v2/internal/channel/adapter"
 )
 
-// This file holds the small package-level helpers shared across the bridge files:
-// platform/account naming, the sender label, and generic slice readers.
+// 本文件承载桥接器各文件共用的小型包级辅助函数：
+// 平台/账号命名、发送者标签，以及通用切片读取。
 
-// basePlatform returns the bare platform name of a (possibly multi-account)
-// adapter name like "telegram:conf0" → "telegram", so the credential gate and the
-// reply-routing fallback treat every account of a platform identically.
+// basePlatform 返回（可能多账号的）适配器名称的裸平台名，
+// 如 "telegram:conf0" → "telegram"，使凭据闸门与
+// 回复路由回退把同一平台的每个账号一视同仁。
 func basePlatform(name string) string {
 	if base, _, ok := strings.Cut(name, ":"); ok {
 		return base
@@ -19,11 +19,11 @@ func basePlatform(name string) string {
 	return name
 }
 
-// adapterName returns the account-adapter registration name (e.g. "kook:3bef...")
-// for the adapter that received a message, or "" when a is nil. The single-account
-// convenience path (process) and a platform with no registered adapter can pass a nil
-// adapter, so the persist hooks tolerate it and store an empty adapter_id rather than
-// dereferencing a nil adapter.
+// adapterName 返回接收消息的账号适配器注册名（如 "kook:3bef..."），
+// a 为 nil 时返回 ""。单账号
+// 便捷路径（process）以及没有已注册适配器的平台都可能传入 nil
+// 适配器，因此持久化钩子容忍它，存空 adapter_id，而不是
+// 解引用 nil 适配器。
 func adapterName(a adapter.PlatformAdapter) string {
 	if a == nil {
 		return ""
@@ -31,11 +31,11 @@ func adapterName(a adapter.PlatformAdapter) string {
 	return a.Name()
 }
 
-// senderDisplayName returns the human-readable sender name used to label a
-// third-party message. It prefers the resolved actor's display name (which the
-// channel layer derived from channel metadata + the raw SenderName), falling back
-// to the message's own SenderName, so an empty SenderName always means "the
-// owner/unlabeled" rather than a nickname that resolved to nothing.
+// senderDisplayName 返回用于标注第三方消息的
+// 人类可读发送者名。它优先取已解析 actor 的显示名（由
+// 渠道层依据渠道元数据 + 原始 SenderName 推导），回退到
+// 消息自身的 SenderName，因此空的 SenderName 始终表示
+// 「主人/未标注」，而不是解析不出结果的昵称。
 func senderDisplayName(msg adapter.UnifiedMessage, actor adapter.Actor) string {
 	if actor.DisplayName != "" {
 		return actor.DisplayName
@@ -43,7 +43,7 @@ func senderDisplayName(msg adapter.UnifiedMessage, actor adapter.Actor) string {
 	return msg.SenderName
 }
 
-// sliceContains reports whether s is present in list.
+// sliceContains 报告 s 是否存在于 list 中。
 func sliceContains(list []string, s string) bool {
 	for _, v := range list {
 		if v == s {
@@ -53,7 +53,7 @@ func sliceContains(list []string, s string) bool {
 	return false
 }
 
-// firstNonEmptyStr returns a when non-empty, otherwise b.
+// firstNonEmptyStr 在 a 非空时返回 a，否则返回 b。
 func firstNonEmptyStr(a, b string) string {
 	if a != "" {
 		return a