deploy: rename deploy path from /var/www/posterg to /var/www/xamxam

TODO.md

@@ -32,6 +32,13 @@
 - [x] Exclude `storage/theses/` from rsync (not sent locally, not deleted remotely)
 - [x] Exclude `storage/covers/` from rsync (not sent locally, not deleted remotely)
 
+## Deploy — Rename deploy path to /var/www/xamxam
+
+- [x] Update rsync destination in `justfile` (`deploy`, `deploy-db` recipes)
+- [x] Update all `/var/www/posterg` paths in `scripts/deploy-server.sh`
+- [x] Update `root` directive in `nginx/posterg.conf`
+- [x] Update `STORAGE_ROOT` production path in `app/bootstrap.php`
+
 ## File Display in Forms & Recaps
 
 - [x] Add live file preview to `file-field.php` partial (`data-preview` attribute + `.file-preview-list` container)