feat(ui): add layout with profile bar, home, search, recipe pages

- Homepage with search and recent recipes
- Search page listing local hits (FTS5)
- Recipe page with ratings, favorites, cooking log, comments
- Wake-Lock on recipe view for mobile kitchen use

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/routes/+layout.svelte

@@ -1 +1,59 @@
-<slot />
+<script lang="ts">
+  import { onMount } from 'svelte';
+  import { profileStore } from '$lib/client/profile.svelte';
+  import ProfileSwitcher from '$lib/components/ProfileSwitcher.svelte';
+
+  let { children } = $props();
+
+  onMount(() => {
+    profileStore.load();
+  });
+</script>
+
+<header class="bar">
+  <a href="/" class="brand">Kochwas</a>
+  <ProfileSwitcher />
+</header>
+
+<main>
+  {@render children()}
+</main>
+
+<style>
+  :global(html, body) {
+    margin: 0;
+    padding: 0;
+    background: #f8faf8;
+    color: #1a1a1a;
+    font-family: system-ui, -apple-system, 'Segoe UI', sans-serif;
+    -webkit-font-smoothing: antialiased;
+  }
+  :global(a) {
+    color: #2b6a3d;
+  }
+  :global(*) {
+    box-sizing: border-box;
+  }
+  .bar {
+    position: sticky;
+    top: 0;
+    z-index: 10;
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    padding: 0.75rem 1rem;
+    background: white;
+    border-bottom: 1px solid #e4eae7;
+  }
+  .brand {
+    font-size: 1.15rem;
+    font-weight: 700;
+    text-decoration: none;
+    color: #2b6a3d;
+  }
+  main {
+    padding: 0 1rem 4rem;
+    max-width: 760px;
+    margin: 0 auto;
+  }
+</style>