docs(cyrene): cmd/cyrene 存量英文注释中文化（22 个非测试文件，仅注释）

- 四组并行完成：main/wire*.go、wire_capacity|channels|runtime、channels|persona_*|emotion|observability、
  voice|plugins|stream|skills|vision|subagent_tool|extractor|mcp|sessionread_tool|terminal_tool。
- 机械校验（git diff -U0 去 // 行与空行）仅剩 wire_frontend.go:84 一处行尾注释：代码前缀
  「\ta.gw = gw 」经 cat -A 与 HEAD 逐字节比对一致（allow 清单已声明）。
- 验收：隔离 worktree（HEAD + 本批 patch）go build/vet 绿、全树 58 包 ok、
  linux/amd64 + darwin/arm64 交叉编译绿；gofmt -l 干净。
- 备注：整树两次红均为负载敏感 flake（backthink / orchestration 的 timeout 类用例单独 -count=20 全过）。

cmd/cyrene/main.go

@@ -1,12 +1,10 @@
-// Command cyrene is the single Cyrene v2 binary. It assembles every subsystem
-// (config, logging, database, bus, personas, model adapter, tool dispatcher,
-// memory stack, agent loop, orchestration, execution, IoT, channel sessions and
-// adapters) into one process and serves the gateway + embedded frontend on a
-// single port (:8080), shutting down gracefully on a termination signal.
+// cyrene 命令是 Cyrene v2 的唯一二进制入口：它把全部子系统（配置、日志、数据库、
+// bus、人格、模型适配器、工具分发器、记忆栈、agent 循环、编排、执行、IoT、渠道
+// 会话与适配器）组装进同一个进程，在单端口（:8080）上同时提供网关与内嵌前端，
+// 并在收到终止信号时优雅退出。
 //
-// Build with `go build -ldflags="-s -w" -trimpath -o cyrene ./cmd/cyrene/`.
-// The frontend must be built first so the SPA can be embedded:
-// `cd frontend/web && npm run build`.
+// 构建：`go build -ldflags="-s -w" -trimpath -o cyrene ./cmd/cyrene/`。
+// 前端必须先构建，SPA 才能被内嵌：`cd frontend/web && npm run build`。
 package main
 
 import (
@@ -17,11 +15,10 @@ import (
 	"os"
 	"path/filepath"
 	"time"
-	// Embed the IANA timezone database so the configured TZ (config.TZ, default
-	// "Asia/Shanghai") resolves everywhere: Windows ships no system tzdata and Go
-	// deliberately does not bundle one, so without this the loop's time injection
-	// silently disables itself there (internal/runtime/loop/time.go logs
-	// "timezone load failed"). Costs ~450 KB and keeps the binary self-contained.
+	// 内嵌 IANA 时区数据库，让配置的 TZ（config.TZ，默认 "Asia/Shanghai"）
+	// 在任何平台都能解析：Windows 不自带系统 tzdata，Go 也刻意不捆绑，缺了它
+	// 循环的时间注入在 Windows 上会静默失效（internal/runtime/loop/time.go 会记
+	// "timezone load failed"）。代价约 450 KB，换来二进制自包含。
 	_ "time/tzdata"
 
 	capreg "git.yeij.top/AskaEth/Cyrene_v2/internal/capability/registry"
@@ -31,16 +28,15 @@ import (
 	"git.yeij.top/AskaEth/Cyrene_v2/internal/webui"
 )
 
-// envPath is the .env file merged at boot (development only; production uses
-// systemd/env_file). A missing .env is not an error.
+// envPath 是启动时合并的 .env 文件（仅开发用；生产走 systemd/env_file）。
+// .env 不存在不算错误。
 const envPath = ".env"
 
-// shutdownTimeout bounds how long the graceful teardown may take.
+// shutdownTimeout 是优雅退场的时长上界。
 const shutdownTimeout = 15 * time.Second
 
-// externalDistCandidates are the on-disk directories checked (in order) for a
-// frontend override before falling back to the embedded dist. The first that
-// exists wins. They are relative to the process working directory.
+// externalDistCandidates 是前端覆盖目录的候选清单：按序检查，都不存在才回落到
+// 内嵌 dist；命中的第一个生效。路径相对进程工作目录。
 func externalDistCandidates() []string {
 	return []string{
 		filepath.Join("frontend", "web", "dist"),
@@ -48,8 +44,8 @@ func externalDistCandidates() []string {
 	}
 }
 
-// resolveFrontendFS returns the filesystem serving the SPA: an external dist
-// directory when present (deploy-time hot override), otherwise the embedded dist.
+// resolveFrontendFS 返回用于伺服 SPA 的文件系统：存在外部 dist 目录时用它
+// （部署期热覆盖），否则用内嵌 dist。
 func resolveFrontendFS(log *slog.Logger) fs.FS {
 	for _, dir := range externalDistCandidates() {
 		if info, err := os.Stat(dir); err == nil && info.IsDir() {
@@ -68,8 +64,7 @@ func main() {
 	}
 }
 
-// run boots the application, starts every service and the gateway, then blocks
-// until a termination signal arrives or the gateway fails.
+// run 启动应用、拉起全部服务与网关，然后阻塞等待终止信号或网关失败。
 func run() error {
 	cfg := config.MustLoad(envPath)
 	format := logger.FormatText
@@ -87,8 +82,8 @@ func run() error {
 	if err != nil {
 		return err
 	}
-	// Observability log tail: the logger's ring buffer is built above (before the
-	// gateway), so hand it to the gateway now that the gateway exists.
+	// 可观测性日志追尾：logger 的环形缓冲在上面（网关之前）就建好了，
+	// 现在网关已存在，把它交给网关。
 	wireGatewayLogBuffer(a, logRing)
 
 	if err := a.automation.Start(ctx); err != nil {