fix(ci): nginx reload 改用 systemctl reload-or-restart，避免空 PID 文件报错

nginx -s reload 依赖 /run/nginx.pid，该文件为空时报 invalid PID number。
改用 systemctl reload-or-restart（经 systemd MAINPID 发 HUP，运行中则 reload、
未运行则启动），并 enable nginx 保证重启后自启。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.0.8] - 2026-06-03
+
+### 修复
+- 修复 EC2 部署最后一步 nginx reload 失败（`invalid PID number`）：改用 `systemctl reload-or-restart nginx`（经 systemd MAINPID 发 HUP，不依赖空的 /run/nginx.pid），并 `enable nginx` 确保重启后自启
+
 ## [1.0.7] - 2026-06-03
 
 ### 修复

scripts/ci/deploy.sh

@@ -126,9 +126,13 @@ mkdir -p /opt/jiu/marketing
 rsync -a --delete /tmp/jiu-marketing-new/ /opt/jiu/marketing/
 rm -rf /tmp/jiu-marketing-new
 
-# Update nginx config and reload
+# Update nginx config and reload.
+# reload-or-restart: reload if nginx is running, start it if it's not — avoids
+# `nginx -s reload` failing with "invalid PID number" when nginx isn't running
+# (e.g. after an EC2 reboot where nginx didn't auto-start).
 sudo cp /tmp/nginx-jiu.conf /etc/nginx/conf.d/jiu.conf
-sudo nginx -t && sudo nginx -s reload
+sudo systemctl enable nginx >/dev/null 2>&1 || true   # auto-start on future reboots
+sudo nginx -t && sudo systemctl reload-or-restart nginx
 
 echo "Deploy complete!"
 ENDSSH