feat: 适配 kimi-code 0.41.0 —— 移除 file_history 镜像 + 守卫文案更新

- file_history flag 上游已移除（turn-level file history 恒开）：
  从 EXPERIMENTAL_FLAGS / env 探测 / FLAG_LABELS / i18n 全链路删除，
  清单回至 9 个；用户 config 残留键被上游静默忽略
- 危险命令守卫行为更新：auto 模式自 0.41.0 起不再拦截危险命令，
  仅 Manual/YOLO 强制询问——开关描述文案（中英）与类型注释同步

src/i18n/en.ts

@@ -153,7 +153,7 @@ export const enTranslations: Record<TranslationKey, string> = {
   permissionAsk: "Ask",
   permissionDangerousGuard: "Dangerous Command Guard",
   permissionDangerousGuardDesc:
-    "When on (default): Auto mode refuses dangerous commands (rm -rf, shutdown, dd of=, ...) and other modes always prompt; turning it off restores the previous behavior. Env KIMI_CODE_DANGEROUS_COMMAND_GUARD overrides this config",
+    "When on (default): Manual/YOLO modes force a prompt for dangerous commands (rm -rf, shutdown, dd of=, ...) and commands that cannot be statically analyzed; Auto (never-ask) mode no longer intercepts them since kimi-code 0.41.0. Turning it off restores the previous behavior. Env KIMI_CODE_DANGEROUS_COMMAND_GUARD overrides this config",
   addRule: "+ Add rule",
   addCommonRules: "Add common rules",
   hooks: "Lifecycle Hooks",
@@ -482,9 +482,6 @@ export const enTranslations: Record<TranslationKey, string> = {
   flagRemoteControlDesc: "Enable the experimental remote control feature",
   flagSearchWorker: "Search Worker",
   flagSearchWorkerDesc: "Run the kap-server global search backend in a background worker host",
-  flagFileHistory: "File History",
-  flagFileHistoryDesc:
-    "Snapshot edited files before/after each turn (last 5 turns across 30 sessions, stored in the session data dir) for real whole-file diffs",
   flagDefaultOn: "On by default",
   lockedByEnv: "Locked by env var",
   masterEnvOnHint: