История коммитов

Replace the raw INSERT statement in the demo data installer with a
Capsule query builder insert, and move demo texts to English source
strings wrapped in d__('guestbook', ...) with the module translation
domain loaded on install. Add Russian translations.

Replace hardcoded Russian demo strings with English source strings wrapped
in d__('library', ...) and load the module translation domain on install,
so demo data follows the language selected in the installer. Keep the
Russian text via the module translation catalog.

Wrap demo category and file titles/descriptions in d__('downloads', ...)
and load the module translation domain on install, so demo data follows
the language selected in the installer. Add Russian translations.

Ship demo images with the module and seed them on install into per-user
album directories with generated thumbnails. Create demo albums covering
every access level (public, private, password-protected) for the admin
and demo users, plus comments and votes.

Demo strings are wrapped in d__('album', ...) and translated into Russian
so they follow the language selected in the installer.

Ship trimmed, ID3-tagged audio, video, image and document samples under
modules/downloads/demo, and seed them via installDemoData(): create
categories under upload/downloads/files, copy files and insert
download__category/download__files rows with English titles, descriptions,
slugs, ratings and download counts.

- Pass string IPs to User creation so the Ip cast stores them (was ip2long twice -> 0)
- Give demo users distinct RFC 5737 example IPs
- Clear cache after install so counters are recalculated
- Rebuild smilies cache so text formatters have a valid list from the first request
- Guard Tools::smilies against an empty or corrupt cache file to avoid a fatal array_merge(null, null)