[feat](trx-client): link web header title to website

Add an optional website URL to config and use it for the web header
title when present, falling back to the version title otherwise.

Co-authored-by: OpenAI Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

src/trx-client/trx-frontend/trx-frontend-http/assets/web/style.css

@@ -508,6 +508,14 @@ small { color: var(--text-muted); }
   flex: 0 1 auto;
 }
 .title { font-size: 1.4rem; font-weight: 700; display: inline-flex; align-items: center; gap: 0.35rem; }
+.title-link {
+  color: inherit;
+  text-decoration: none;
+}
+.title-link:hover {
+  text-decoration: underline;
+  text-underline-offset: 0.14em;
+}
 .overview-strip {
   width: 100%;
   margin: 0;