fix: права www-data после git pull и npm install

Co-authored-by: Cursor <cursoragent@cursor.com>

wiki/Troubleshooting.md

@@ -38,6 +38,8 @@ journalctl -u shop -n 50 --no-pager
 | Placeholder / `URL_РЕПОЗИТОРИЯ` | `git clone <ваш-url> "$SHOP_ROOT"` — не копировать шаблоны как команды |
 | Нет `package.json` | `find /opt -name package.json`; `cd` в найденный каталог |
 | detached HEAD | `bash scripts/git-sync.sh` |
+| `EACCES` на `package-lock.json`, npm от www-data | `sudo bash scripts/fix-shop-permissions.sh` затем `sudo npm install --omit=dev` и снова `fix-shop-permissions` |
+| `shop.service` failed после обновления | `sudo bash scripts/fix-shop-permissions.sh` && `sudo systemctl restart shop` |
 | Нет `scripts/...` | `bash "$SHOP_ROOT/scripts/server-update.sh"` |
 | Unit shop not found | `sudo bash scripts/install-shop-service.sh` |
 | shop exit-code / auto-restart | `sudo bash scripts/free-port-3000.sh`; `systemctl restart shop` |