Add optimistic UI feedback and smooth transition to enable/disable toggles

package.json

@@ -1,6 +1,6 @@
 {
   "name": "site-gateway",
-  "version": "0.11.48",
+  "version": "0.11.49",
   "private": true,
   "description": "Site Gateway: simple self-hosted website publishing, reverse proxying, and automatic HTTPS.",
   "type": "module",

src/public/app.js

@@ -377,7 +377,7 @@ $("#site-grid").addEventListener("click", async event => {
   const card = event.target.closest(".site-card"); if (!card) return; const action = event.target.closest("[data-action]")?.dataset.action, kind = card.dataset.kind;
   if (event.target.closest(".menu-button")) { const opening = !card.classList.contains("menu-open"); closeMenus(); card.classList.toggle("menu-open", opening); card.querySelector(".menu-button").setAttribute("aria-expanded", String(opening)); return; } if (!action) return;
   closeMenus();
-  if (action === "toggle") { const base = kind === "proxy" ? "proxies" : "sites"; await api(`/api/${base}/${card.dataset.id}/toggle`, { method: "POST" }); await refresh(); toast("Status and gateway configuration updated."); }
+  if (action === "toggle") { const toggleButton = event.target.closest(".toggle"), wasOn = toggleButton.classList.contains("on"); toggleButton.classList.toggle("on", !wasOn); toggleButton.disabled = true; const base = kind === "proxy" ? "proxies" : "sites"; try { await api(`/api/${base}/${card.dataset.id}/toggle`, { method: "POST" }); await refresh(); toast("Status and gateway configuration updated."); } catch (error) { toggleButton.classList.toggle("on", wasOn); toggleButton.disabled = false; toast(error.message || "Could not update status."); } }
   if (action === "settings") openSettings(kind, card.dataset.id);
   if (action === "delete") { state.pendingDelete = { kind, id: card.dataset.id }; $("#confirm-title").textContent = kind === "proxy" ? "Delete this proxy host?" : "Delete this hosted site?"; $("#confirm-copy").textContent = kind === "proxy" ? "Its domain route will be removed from the gateway." : "Its route and uploaded files will be permanently removed."; $("#confirm-dialog").showModal(); }
   if (action === "replace") { state.pendingReplace = card.dataset.id; $("#replace-files").click(); }