fix(launcher): 开机亮度停100竞态 (agent-230) — settings未读到前不盲写100, 挂起+读到后补应用; launcher aa6c95a4→8ebae666; 宿主4场景PASS

patch_v2/meow_launcherd/util.c

@@ -640,6 +640,14 @@ void settings_load(void)
         settings_cache_registered = 1;
     }
     settings_sync_cache_from_backend();
+    /* M2.86 开机亮度竞态：launcher S70 早启动 /usr/data 未就绪 → 首次 init 读到的是纯默认值
+     * （display.brightness=101→clamp 100），apply_user_brightness 已挂起 meow_brightness_pending。
+     * 此处 settings 一旦真正从盘上读到（meow_settings_loaded()==1）即补应用真实用户亮度。
+     * 幂等：正常路径（已读到、无挂起）恒为 no-op；仅「未读到→已读到」转换时触发一次。 */
+    if (meow_settings_loaded() && meow_brightness_pending) {
+        apply_user_brightness();
+        logmsg("deferred user brightness applied after settings ready");
+    }
     logmsg("settings: vol=%d(max=%d,step=%d) refresh=%d(always_max=%d) off=%ds mode=%s",
            settings_volume, settings_volume_max, settings_volume_step,
            refresh_rate_cfg, refresh_always_max, screen_off_timeout,