docs(runtime): internal/runtime/loop 44 个文件注释改中文（逐行 1:1，代码零字节改动）

主人 2026-10-03 拍板「注释一律中文」；本模块按长期分批协议（一个模块一次派工）执行。
注释行数 1329 → 1329 逐行 1:1（含中文 33 → 1304）；行尾注释 5 条一并译。
校验：机械校验（非注释改动行）= 空；独立 Go AST 程序（剥注释复渲）证明 44/44 文件代码全等；
全树 go test ./... 58 包 ok / 0 FAIL；交叉编译绿。
gofmt：capacity_loop_test.go / flow.go 改动前即未格式化，按铁律保留原样未动。

internal/runtime/loop/time.go

@@ -8,12 +8,12 @@ import (
 	"git.yeij.top/AskaEth/Cyrene_v2/internal/runtime/model"
 )
 
-// weekdaysCN maps time.Weekday (0=Sunday) to a Chinese weekday label.
+// weekdaysCN 把 time.Weekday（0=周日）映射为中文星期标签。
 var weekdaysCN = [...]string{"周日", "周一", "周二", "周三", "周四", "周五", "周六"}
 
-// loadTimezone resolves the configured IANA timezone into a *time.Location for
-// the per-round time injection. An empty name (or one that fails to load) yields
-// nil, disabling injection entirely (backward compatible, graceful degradation).
+// loadTimezone 把配置的 IANA 时区解析为 *time.Location，供每轮
+// 时间注入使用。空名（或加载失败的名字）返回 nil，
+// 从而完全关闭注入（向后兼容，优雅降级）。
 func loadTimezone(name string, log *slog.Logger) (*time.Location, string) {
 	if name == "" {
 		return nil, ""
@@ -26,11 +26,11 @@ func loadTimezone(name string, log *slog.Logger) (*time.Location, string) {
 	return loc, name
 }
 
-// currentTimeBlock renders one per-round "current time" system message so the
-// model knows the wall-clock time each round (not a first-turn snapshot). It is
-// called from assembleContext only when a timezone was configured. It provides
-// the raw clock — whether it is "late and time to sleep" is the persona prompt's
-// job, not a hard-coded rule here.
+// currentTimeBlock 渲染一条每轮「当前时间」系统消息，使模型
+// 每轮都知道墙上时钟时间（而非首轮快照）。它仅在配置了
+// 时区时由 assembleContext 调用。它只提供原始时钟 ——
+// 是否「夜深该睡了」是人格提示词的职责，不是这里的
+// 硬编码规则。
 func (l *Loop) currentTimeBlock() model.Message {
 	now := time.Now().In(l.timeLocation)
 	text := fmt.Sprintf("当前时间：%s %s，时区 %s",