SSR module: rebuilt on TYPO3 module layout, cards and core components

Ticket 0096-FE (aehm): the module now uses the core Module layout (DocHeader with reload and shortcut, module-body spacing), a Status card as description list with one badge style, an Actions card with core buttons and icons, help texts below the buttons and TYPO3 modal confirmations (ssr-module.js) instead of window.confirm, and three protocol cards. Purge protocol rows show a one-line time, the trigger as badge plus user, paths as count + first two + disclosure, result and duration right-aligned, with 30/100/500 row switches. Status shows the last health sample with relative age and the cache limit (new optional SSR_CACHE_LIMIT_MB in var/vitec-ssr-purge.env, SsrPurgeService::getCacheLimitMb). ssr-warm-progress.js now also disables the Warm button with a spinner while a run is active. backend-ssr.css holds only layout glue with core CSS variables (dark mode safe). Verified in the backend: layout, modal, running progress bar, protocol tables.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

packages/vitec/Classes/Service/SsrPurgeService.php

@@ -76,6 +76,16 @@ final class SsrPurgeService
         return max(1, (int)($this->getConfig()['SSR_FAILOVER_AFTER'] ?? 2));
     }
 
+    /**
+     * SSR_CACHE_MB of the node (/etc/vitec-ssr.env on the VPS) as the
+     * module knows it — the node does not report its limit in /__health.
+     * Optional SSR_CACHE_LIMIT_MB in var/vitec-ssr-purge.env; 0 = unknown.
+     */
+    public function getCacheLimitMb(): int
+    {
+        return max(0, (int)($this->getConfig()['SSR_CACHE_LIMIT_MB'] ?? 0));
+    }
+
     /**
      * POST /__warm on the node (contract 0066-FE), derived from
      * SSR_PURGE_ENDPOINT; SSR_WARM_ENDPOINT overrides explicitly.