homepage: HF source links per model; docs reorder (AI last), arr stack out of family docs

shared/homepage/app.js

@@ -83,7 +83,10 @@ function miCard(svc, state) {
         '<img class="mi-art" src="/img/unit-' + esc(m.unit) + '.jpg" alt="' + esc(m.unit) + '">' +
         '<div class="mi-head"><div class="mi-id"><span class="badge ' + state + '">' + BADGE_LABEL[state] + '</span>' +
         '<span class="mi-name">' + esc(svc.name) + '</span></div>' +
-        '<div class="mi-role">' + esc(m.role) + '</div></div></div>',
+        '<div class="mi-role">' + esc(m.role) + '</div>' +
+        (m.hf ? '<a class="mi-hf" href="' + esc(m.hf) +
+            '" target="_blank" rel="noopener">model on huggingface &#8599;</a>' : '') +
+        '</div></div>',
         voiceBtn(m.tagline, m.sfx)
     ];
     if (m.equiv) parts.push('<div class="mi-equiv">' + esc(m.equiv) + '</div>');