Replace the separate /admin/status.php and /admin/logs.php pages with a
single /admin/system.php page organised around a tab bar.
- system.php — top-level tab bar: 'Statut' + one tab per log file
(nginx accès, nginx erreurs, PHP-FPM). Switching tabs is a plain
href (?tab=…) so no JS required for navigation; the lines-selector
SELECT triggers a location change on 'change' for instant reload
without a submit button.
- Status tab preserves all existing service cards, PHP runtime grid,
and disk-usage bar from the old status.php.
- Log tabs preserve line-count selector, file metadata bar, and
per-line colour coding from the old logs.php.
- New: copy-to-clipboard button on each log output block (Clipboard
API with textarea execCommand fallback).
- status.php / logs.php replaced with 301 redirect stubs so existing
bookmarks and links keep working.
- templates/admin/head.php: 'Statut' + 'Journaux' nav items replaced
with a single 'Système' item; active state covers all three page
names for redirect compatibility.
- public/admin/logs.php: new page tailing nginx error/access + PHP-FPM logs.
Selector for log file and line count (50/100/200/500, default 100).
Lines reversed (newest first), colour-coded by severity, numbered gutter.
Graceful degradation when exec() unavailable or file unreadable (dev msg).
- templates/admin/head.php: 'Journaux' nav link added after 'Statut'.
- public/admin/status.php: remove curl_close() call deprecated in PHP 8.5
(no-op since PHP 8.0); replace with unset($ch) to silence the warning
that was leaking raw text above the page output.
