Support: add a feedback email, rebrand from Donate, tighten privacy copy

docs/architecture/visual-specimen.html

@@ -466,7 +466,7 @@
       .btn-ghost-util:hover {
         background: var(--layer-02);
       }
-      /* Soft-accent: a low-emphasis accent wash (Donate) — noticed, not shouting. */
+      /* Soft-accent: a low-emphasis accent wash (Support) — noticed, not shouting. */
       .btn-soft {
         background: var(--accent-soft);
         color: var(--accent-hover);
@@ -984,7 +984,7 @@
         <h3 style="margin-top: var(--space-6)">Emphasis hierarchy — a header cluster</h3>
         <p class="cap" style="margin-bottom: var(--space-4)">
           Utilities go <strong>ghost</strong> (icon + text, borderless) so they recede; a divider
-          sets off <strong>Donate</strong> on a <strong>soft-accent</strong> wash — one low-key
+          sets off <strong>Support</strong> on a <strong>soft-accent</strong> wash — one low-key
           solicitation, no border. (Carbon: one high-emphasis action per region; utilities at low
           emphasis.)
         </p>
@@ -1024,7 +1024,7 @@
             >About
           </button>
           <span class="hdr-divider"></span>
-          <button class="btn btn-soft">Donate</button>
+          <button class="btn btn-soft">Support</button>
         </div>
       </section>