feat: a short name of up to 7 characters for each model, on the chat's model button, always whole; the message field back to the normal 14px

internal/server/web/static/ai.js

@@ -711,7 +711,9 @@
     const always = window.Prefs && Prefs.get().aiModelPick === 'always';
     mpick.hidden = !(models.length > 1 || (always && models.length));
     const cur = modelId(), m = models.find(x => x.id === cur);
-    q('.ai-mname').textContent = m ? m.name : '';
+    // The button: the short name if there is one; the list: the full names.
+    q('.ai-mname').textContent = m ? (m.short || m.name) : '';
+    mpick.classList.toggle('short', !!(m && m.short));
     mbtn.title = m ? 'Модель: ' + m.name : 'Модель';
     mmenu.innerHTML = '';
     models.forEach(x => {