Add a 'nginx — config' tab to the Système admin page (system.php).
- Reads /etc/nginx/sites-available/posterg (live deployed config) first;
falls back to nginx/posterg.conf (local reference copy) when the live
path is inaccessible (e.g. in dev, or wrong permissions).
- Displays a colour-coded badge: green '● Config déployée' for live,
amber '⚠ Référence locale' for the fallback.
- Renders the full config in the shared .log-output code block with
line numbers (data-n gutter via CSS ::before) and lightweight nginx
syntax colouring (comments grey, block keywords purple, directives blue).
- Reuses the existing copy-to-clipboard button.
- Tab routing: activeTab validation extended to accept 'nginx_config';
log pre-loading guards skip when activeTab is 'nginx_config'.
- No remote execution: read-only, zero new attack surface.
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.
