v0.35.1: performance, AGPL licensing and documentation overhaul

- Web Server reads static files inline; proxy middleware chain flattened
- About window with license summary and project links; AGPL-3.0-or-later
- Rewritten documentation: feature list, screenshots, performance guide
- Fix false spikes in per-Vhost request-rate charts

src/admin/web/css/60-monitoring.css

@@ -1,6 +1,4 @@
-/* Traffic, cache, transformations, live/stored logs and configuration history.
- * Order is defined in manifest.json; responsive rules are centralized in 70-responsive.css.
- */
+/* Traffic, cache, transformations, live/stored logs and configuration history */
 
 .certificate-card .pill,
 .cache-miss-key,