feat(site): count CPU engineering samples in the homepage stats

Reads the satellite repo's published catalog.json and adds its record
count as a stat tile; the footer link from #174 is removed.

Refs #19

Author: Seungpyo1007

site/src/pages/index.astro

@@ -330,9 +330,7 @@ const endpoints = [
         <div class="foot-links">
           <a href={ghUrl} target="_blank" rel="noopener">GitHub</a>
           <a href={`${base}docs`}>API reference</a>
-          <a href="#playground">Playground</a>
-          <a href="https://gettechapi.github.io/cpu-engineering-samples/" target="_blank" rel="noopener">CPU engineering samples</a>
-        </div>
+          <a href="#playground">Playground</a>        </div>
       </div>
       <p class="foot-warn">⚠ Curated, growing dataset — not yet an exhaustive catalog of every device.</p>
       <p class="foot-engine">Validated, scored &amp; served by <a href={engineUrl} target="_blank" rel="noopener"><span class="mark">T</span>TechEngine</a> — the open data + scoring engine.</p>

site/src/scripts/techapi.js

@@ -182,6 +182,15 @@ async function loadList(resource) {
     // The hero is already in view at first paint. Animate immediately so the
     // counters do not remain at zero when IntersectionObserver is delayed.
     el.querySelectorAll(".num").forEach((n) => countUp(n, +n.dataset.n));
+    // Satellite data repos publish their own catalog; count them alongside.
+    fetch("https://gettechapi.github.io/cpu-engineering-samples/catalog.json")
+      .then((r) => (r.ok ? r.json() : Promise.reject()))
+      .then((list) => {
+        el.insertAdjacentHTML("beforeend",
+          `<div class="stat"><div class="n"><span class="num">0</span></div><div class="l">cpu eng. samples</div></div>`);
+        countUp(el.lastElementChild.querySelector(".num"), list.length);
+      })
+      .catch(() => {});
   }).catch(() => {
     el.innerHTML = '<div class="stat"><div class="n">—</div><div class="l">build data first</div></div>';
   });