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/app/rate-sampling.js

@@ -1,6 +1,4 @@
-// One continuity policy for all browser-side counter-derived rates.
-// Background tabs cannot supply a valid instantaneous rate for an interval
-// spanning the pause. Keep the plotted history and rebase on the next sample.
+// Shared rate sampling: rebase after background-tab pauses instead of plotting a false spike.
 const rustProxyRateSampling = (() => {
     let generation = 0;
     const pause = () => { generation += 1; };
@@ -19,6 +17,10 @@ const rustProxyRateSampling = (() => {
             at - previous.at <= Math.max(10000, seconds * 3000));
     }
     function difference(previous, values, at, intervalSeconds = 3) {
+        if (previous && previous.generation === generation && Number.isFinite(at) &&
+            Number.isFinite(previous.at) && at >= previous.at && at - previous.at < 250) {
+            return { next: previous, deltas: null, seconds: null, rapid: true };
+        }
         const next = { ...stamp(at), values: [...values] };
         if (!continuous(previous, at, intervalSeconds) ||
             values.some((value, i) => !Number.isFinite(value) || value < 0 ||