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

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MMsgSXoK4Bph2vU6fSBkAH

docs/VHOSTS.md

@@ -58,7 +58,7 @@ Sample documents in `examples/vhosts-private.json` and `examples/vhosts-balanced
 
 A backend's `preserve_host` option can retain the frontend authority when appropriate. HTTPS encryption alone does not guarantee verified backend identity: `tls_verify` is **false by default**. Enable verification and configure trusted CA/name for sensitive connections. Private, loopback and RustProxy-local listener targets require explicit security exceptions; do not point a public route to the admin listener. Read [Security](SECURITY.md).
 
-Connection reuse is bounded by configured idle-pool/recycle limits. 0.34.0 changes the default H1 upstream idle pool for newly configured Vhosts; previously saved explicit values remain. Configure timeouts to suit expected request and upload behavior; a slow origin may need more than the default response-header timeout.
+Connection reuse is bounded by configured idle-pool/recycle limits. The default H1 upstream idle pool applies to newly configured Vhosts; previously saved explicit values remain. Configure timeouts to suit expected request and upload behavior; a slow origin may need more than the default response-header timeout.
 
 ## Load balancing and health