fix: the chat's machine name on one line without the dot, cut with …; close buttons always square

internal/server/web/static/ai.js

@@ -258,7 +258,9 @@
   }
   function where() {
     const act = W() && W().activePane();
-    q('.ai-where').textContent = act ? '· ' + (act.agent ? act.agent.name : '') : '';
+    const name = act && act.agent ? act.agent.name : '';
+    q('.ai-where').textContent = name;
+    q('.ai-where').title = name;
   }
 
   // ---------- machines ----------