stage-exp-e explore: link from home + info endpoint

src/psyc/cockpit/static/cockpit.css

@@ -748,6 +748,18 @@ body.wide .net-grid { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr
   text-shadow: 0 0 22px var(--accent-glow);
 }
 .hero-sub { margin: 6px 0 0; color: var(--muted); font-size: 13px; }
+.hero-meta { margin: 10px 0 0; font-size: 12px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
+.hero-explore {
+  color: var(--accent);
+  font-family: ui-monospace, Menlo, Consolas, monospace;
+  text-decoration: none;
+  border: 1px solid var(--border);
+  padding: 3px 9px;
+  border-radius: 999px;
+  letter-spacing: 0.04em;
+}
+.hero-explore:hover { border-color: var(--accent); box-shadow: 0 0 10px var(--accent-glow); }
+.hero-explore-sub { color: var(--muted); font-size: 11px; font-family: ui-monospace, Menlo, Consolas, monospace; }
 .hero-cta {
   display: inline-flex; align-items: center; gap: 6px;
   padding: 9px 16px; border: 1px solid var(--accent); border-radius: 8px;

src/psyc/cockpit/static/sw.js

@@ -5,7 +5,7 @@
 // This makes the cockpit installable as a PWA and survives flaky connections,
 // without serving stale operational data behind the operator's back.
 
-const CACHE_VERSION = "psyc-v7";
+const CACHE_VERSION = "psyc-v8";
 const STATIC_ASSETS = [
   "/static/cockpit.css",
   "/static/psyc-tokens.css",

src/psyc/cockpit/templates/home.html

@@ -6,6 +6,7 @@
   <div class="hero-text">
     <h1 class="hero-title">Defensive CTI in motion</h1>
     <p class="hero-sub">What psyc has seen and done — at a glance.</p>
+    <p class="hero-meta"><a class="hero-explore" href="/federation/explore">Federation Explorer →</a> <span class="hero-explore-sub">public · auditable trust network</span></p>
   </div>
   <a class="hero-cta" href="/cases">All cases →</a>
 </section>