add kirby-loop plugin with French translations

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

site/plugins/loop/frontend/src/store/ui.svelte.ts

@@ -0,0 +1,34 @@
+export const panel = $state({
+  open: false,
+  currentCommentId: 0,
+  showResolvedOnly: false,
+  pulseMarkerId: 0
+});
+export const overlay = $state({ open: false });
+
+// Guest name management
+let guestNameValue = $state("");
+
+export const guestName = {
+  get value() {
+    return guestNameValue;
+  },
+  set(name: string) {
+    guestNameValue = name;
+    if (typeof window !== 'undefined') {
+      sessionStorage.setItem('loop-guest-name', name);
+    }
+  },
+  get() {
+    if (!guestNameValue && typeof window !== 'undefined') {
+      guestNameValue = sessionStorage.getItem('loop-guest-name') || "";
+    }
+    return guestNameValue;
+  },
+  clear() {
+    guestNameValue = "";
+    if (typeof window !== 'undefined') {
+      sessionStorage.removeItem('loop-guest-name');
+    }
+  }
+};