fix(comments): denser zibll-like chrome and guest fields

Tighten comment form density, collapse guest name/email behind a
toggle, and refine empty-state copy for closed/author-only views.

assets/js/core/comments.js

@@ -675,6 +675,41 @@
     });
   }
 
-  window.AksrtFrontend.register("aksrt-comment-system", function () { initCommentSystem(); });
+
+  function initGuestFields() {
+    var root = document.getElementById("comments") || document;
+    root.querySelectorAll("[data-aksrt-guest-toggle]").forEach(function (btn) {
+      if (btn.dataset.aksrtGuestBound === "1") return;
+      btn.dataset.aksrtGuestBound = "1";
+      var wrap = btn.closest(".comment-form__guest");
+      var fields = wrap ? wrap.querySelector("[data-aksrt-guest-fields]") : null;
+      if (!fields) return;
+      btn.addEventListener("click", function (e) {
+        e.preventDefault();
+        var open = btn.getAttribute("aria-expanded") === "true";
+        btn.setAttribute("aria-expanded", open ? "false" : "true");
+        if (open) {
+          fields.setAttribute("hidden", "");
+          fields.classList.remove("is-open");
+        } else {
+          fields.removeAttribute("hidden");
+          fields.classList.add("is-open");
+          var first = fields.querySelector("input");
+          if (first) first.focus();
+        }
+      });
+      // Auto-open if browser restored values or validation fails later.
+      var form = btn.closest("form");
+      if (form) {
+        form.addEventListener("invalid", function () {
+          fields.removeAttribute("hidden");
+          fields.classList.add("is-open");
+          btn.setAttribute("aria-expanded", "true");
+        }, true);
+      }
+    });
+  }
+
+  window.AksrtFrontend.register("aksrt-comment-system", function () { initCommentSystem(); initGuestFields(); });
   window.AksrtFrontend.register("aksrt-comment-order", function (root) { initCommentOrder(root); });
 })();