Add a TTL-based cache for the expensive checks on the admin system page,
eliminating repeated systemctl subprocess calls (~4×~100ms), curl self-pings
(~200-500ms), disk_*_space() and PHP ini reads on every page load.
Changes:
- storage/migrations/007_system_cache.sql: new migration creating the
system_cache table (key TEXT PK, value TEXT, updated_at INTEGER)
- storage/schema.sql: system_cache table added before pages table
- Applied migration to live storage/posterg.db
- src/SystemCache.php: new class with get/set/isStale/ageSeconds/invalidate;
uses SQLite INSERT … ON CONFLICT upsert; no external dependencies
- src/Database.php: added getDatabasePath(): string accessor
- public/admin/system.php:
- Bootstrap SystemCache at request start using the existing DB PDO handle
- system_status: cached with 2-min TTL (systemctl + curl checks)
- php_info: cached with 1-hour TTL (PHP ini values are runtime-constant)
- disk_info: cached with 5-min TTL (total/free/used/pct tuple)
- Logs section: unchanged — always reads live log tail per active tab
- ?refresh=1 GET param invalidates all three cache keys before rendering
- Status panel heading shows cache badge: '⚡ Cache — il y a Xs' (hit)
or '⟳ Actualisé' (miss/fresh), styled via new .sys-cache-badge rules
- public/assets/css/system.css: .sys-cache-badge / --hit / --miss styles
- Create public/assets/css/system.css with all 280 lines of CSS that were
inline in system.php: tab bar, status cards, PHP info grid, disk bar,
log viewer, nginx config viewer, and syntax-highlight classes.
- Disk bar dynamic values (width %, colour) moved from PHP-interpolated CSS
rules to CSS custom properties (--disk-pct, --disk-color) set on the
element via an inline style attribute; static .disk-bar rule in system.css
consumes them via var().
- system.php JS block (tab-select auto-nav + copy-to-clipboard) moved to
$extraJsInline heredoc; footer.php emits it before </body> — keeps it
out of the document <head> and removes the bare <script> after </main>.
- system.php now sets $extraCss = ['/assets/css/system.css'] so head.php
emits a proper <link> in <head>, consistent with all other admin pages.
- No behaviour change; system.php is now zero inline CSS/JS.
