Add skeleton, updates to client email formatting

src/routes/+layout.svelte

@@ -1,7 +1,9 @@
 <script lang="ts">
   import { onMount } from 'svelte';
+  import { navigating, page } from '$app/stores';
   import { afterNavigate, disableScrollHandling } from '$app/navigation';
   import { initClickTracking, trackPageView } from '$lib/analytics';
+  import RouteSkeleton from '$lib/components/RouteSkeleton.svelte';
   import '$lib/styles/variables.css';
   import '$lib/styles/base.css';
   import '$lib/styles/layout.css';
@@ -13,6 +15,26 @@
 
   onMount(() => initClickTracking());
 
+  function shouldShowSkeleton() {
+    const navigation = $navigating;
+
+    if (!navigation?.to?.url) {
+      return false;
+    }
+
+    const fromPath = navigation.from?.url.pathname ?? $page.url.pathname;
+    const toPath = navigation.to.url.pathname;
+
+    if (navigation.to.url.hash && toPath === fromPath) {
+      return false;
+    }
+
+    return toPath !== fromPath;
+  }
+
+  $: loadingPath = $navigating?.to?.url.pathname ?? $page.url.pathname;
+  $: showRouteSkeleton = shouldShowSkeleton();
+
   afterNavigate(({ from, to }) => {
     if (!from || !to || to.url.hash) {
       return;
@@ -38,4 +60,32 @@
   });
 </script>
 
-<slot />
+<div class="layout-shell">
+  <div class:layout-content-loading={showRouteSkeleton} class="layout-content" aria-hidden={showRouteSkeleton}>
+    <slot />
+  </div>
+
+  {#if showRouteSkeleton}
+    <div class="layout-skeleton-layer" role="status" aria-label="Loading page" aria-live="polite">
+      <RouteSkeleton pathname={loadingPath} />
+    </div>
+  {/if}
+</div>
+
+<style>
+  .layout-shell {
+    position: relative;
+  }
+
+  .layout-content-loading {
+    visibility: hidden;
+  }
+
+  .layout-skeleton-layer {
+    position: fixed;
+    inset: 0;
+    z-index: 30;
+    overflow-y: auto;
+    background: rgba(251, 251, 251, 0.98);
+  }
+</style>