fix(i18n): 修 EN reading_time 偏差 + 治 06-hal-gpio-output 翻译膨胀

Charliechen114514 · Charliechen114514 · commit 8be6d41f07e5 · 2026-06-16T18:24:29.000+08:00
06-hal-gpio-output 首跑旧流水线被 glm-4.6 重生成代码膨胀 6 倍(10K→60K字符)；改用 prose-only 重译回落到 1.15x(代码逐字保留)。

另按 check_quality 估值修 3 篇 reading_time_minutes: enum-class/nested-namespace 2→1，channel-actor 10→6。EN reading_time 告警归零。
diff --git a/documents/en/cpp-reference/core-language/05-enum-class.md b/documents/en/cpp-reference/core-language/05-enum-class.md
@@ -10,7 +10,7 @@ description: Scoped enums, preventing enum values from polluting the external na
   and prohibiting implicit type conversions.
 difficulty: beginner
 order: 5
-reading_time_minutes: 2
+reading_time_minutes: 1
 tags:
 - host
 - cpp-modern
diff --git a/documents/en/cpp-reference/core-language/15-nested-namespace.md b/documents/en/cpp-reference/core-language/15-nested-namespace.md
@@ -7,7 +7,7 @@ cpp_standard:
 description: Use `A::B::C` syntax instead of nested namespace braces
 difficulty: beginner
 order: 15
-reading_time_minutes: 2
+reading_time_minutes: 1
 tags:
 - host
 - cpp-modern
diff --git a/documents/en/vol5-concurrency/exercises/05-channel-actor.md b/documents/en/vol5-concurrency/exercises/05-channel-actor.md
@@ -10,7 +10,7 @@ prerequisites:
 - '卷五 ch07: Actor 与 Channel'
 - 'Lab 1: Bounded Queue, Concurrent Cache and Sync Primitives'
 - 'Lab 4: Coroutine Scheduler and Event Loop'
-reading_time_minutes: 10
+reading_time_minutes: 6
 tags:
 - host
 - cpp-modern
diff --git a/documents/en/vol8-domains/embedded/01-led/06-hal-gpio-output.md b/documents/en/vol8-domains/embedded/01-led/06-hal-gpio-output.md
