Add a prominent link to the full portfolio

The top bar's accent button becomes Portfolio (Email stays in the hero and
the contact band), the hero gets a Full portfolio button, and the project
list ends with a large block linking to it. The link points at Gitea's list
of repos with the portfolio topic; the sync supplies the count and the
resume file can override the target and label. Also eases the display
weight and tracking of the name in the dark theme.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XtcZtnG4GQA1d6mW5PNrS9

components/hero.module.css

@@ -108,7 +108,7 @@
 .name {
   margin: 30px 0 0 -0.045em;
   font: var(--name-weight) clamp(56px, 12.6vw, 204px) / 0.88 var(--font-head);
-  letter-spacing: -0.048em;
+  letter-spacing: var(--name-tracking);
 }
 
 .role {
@@ -189,3 +189,25 @@
   .plane::before { top: 170px; }
   .plane { background-size: 56px 56px; }
 }
+
+.link {
+  margin-left: 10px;
+  padding: 14px 0;
+  font: 600 16px/1.2 var(--font-body);
+  text-decoration: underline;
+  text-decoration-thickness: 1.5px;
+  text-underline-offset: 5px;
+  text-decoration-color: var(--ink-line);
+  transition: text-decoration-color 0.2s, color 0.2s;
+}
+
+.link:hover {
+  color: var(--z-text);
+  text-decoration-color: currentColor;
+}
+
+@media (max-width: 620px) {
+  .link {
+    margin-left: 0;
+  }
+}