refactor(errors): redesign error pages in editorial style

Replace the emoji/gradient card with an editorial layout: small lucide
glyph, oversized error code, hairline-divided serif bible quote.

Extract shared ErrorView + SectionError components and a bilingual
string helper. Add +error.svelte at each section root (faith, recipes,
fitness, tasks, cospend) so errors render inside the correct layout and
inherit the section-specific header/nav. Catch-all [...rest]/+page.ts
stubs route unmatched URLs through the section layout so the right
error page catches them.

src/lib/components/ErrorView.svelte

@@ -0,0 +1,222 @@
+<script lang="ts">
+  import type { Snippet, Component } from 'svelte';
+  import { Lock, Ban, SearchX, TriangleAlert, CircleAlert } from '@lucide/svelte';
+
+  interface BibleQuote {
+    text: string;
+    reference: string;
+  }
+
+  interface Props {
+    status: number;
+    title: string;
+    description: string;
+    details?: string;
+    bibleQuote?: BibleQuote | null;
+    isEnglish?: boolean;
+    icon?: Component;
+    actions?: Snippet;
+  }
+
+  let {
+    status,
+    title,
+    description,
+    details,
+    bibleQuote,
+    isEnglish = true,
+    icon,
+    actions
+  }: Props = $props();
+
+  function defaultIcon(status: number): Component {
+    switch (status) {
+      case 401: return Lock;
+      case 403: return Ban;
+      case 404: return SearchX;
+      case 500: return TriangleAlert;
+      default: return CircleAlert;
+    }
+  }
+
+  let Icon = $derived(icon ?? defaultIcon(status));
+  let openQuote = $derived(isEnglish ? '\u201C' : '\u201E');
+  let closeQuote = $derived(isEnglish ? '\u201D' : '\u201C');
+</script>
+
+<main class="error-page">
+  <article class="error-article">
+    <header class="eyebrow">
+      <Icon size={14} strokeWidth={1.5} aria-hidden="true" />
+      <span class="eyebrow-label">
+        {isEnglish ? 'Error' : 'Fehler'}
+      </span>
+    </header>
+
+    <div class="code" aria-hidden="true">{status}</div>
+
+    <h1 class="title">{title}</h1>
+    <p class="description">{description}</p>
+
+    {#if details}
+      <p class="details">{details}</p>
+    {/if}
+
+    {#if actions}
+      <nav class="actions">
+        {@render actions()}
+      </nav>
+    {/if}
+
+    {#if bibleQuote}
+      <hr class="rule" />
+      <figure class="quote">
+        <blockquote class="quote-text">
+          {openQuote}{bibleQuote.text}{closeQuote}
+        </blockquote>
+        <figcaption class="quote-reference">{bibleQuote.reference}</figcaption>
+      </figure>
+    {/if}
+  </article>
+</main>
+
+<style>
+  .error-page {
+    min-height: calc(100vh - 6rem);
+    display: flex;
+    align-items: flex-start;
+    justify-content: center;
+    padding: clamp(3rem, 10vh, 8rem) 1.5rem 4rem;
+    background: var(--color-bg-primary);
+  }
+
+  .error-article {
+    width: 100%;
+    max-width: 640px;
+  }
+
+  .eyebrow {
+    display: inline-flex;
+    align-items: center;
+    gap: 0.5rem;
+    color: var(--color-text-tertiary);
+    margin-bottom: 1rem;
+  }
+
+  .eyebrow-label {
+    font-size: 0.75rem;
+    font-weight: 500;
+    letter-spacing: 0.18em;
+    text-transform: uppercase;
+  }
+
+  .code {
+    font-size: clamp(7rem, 22vw, 14rem);
+    font-weight: 200;
+    line-height: 0.9;
+    letter-spacing: -0.05em;
+    color: var(--color-text-primary);
+    margin: 0 0 1.5rem;
+    font-variant-numeric: lining-nums tabular-nums;
+  }
+
+  .title {
+    font-size: clamp(1.5rem, 3vw, 2rem);
+    font-weight: 500;
+    letter-spacing: -0.01em;
+    color: var(--color-text-primary);
+    margin: 0 0 0.5rem;
+  }
+
+  .description {
+    font-size: 1.0625rem;
+    line-height: 1.55;
+    color: var(--color-text-secondary);
+    margin: 0;
+    max-width: 44ch;
+  }
+
+  .details {
+    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
+    font-size: 0.8125rem;
+    color: var(--color-text-tertiary);
+    margin: 1.25rem 0 0;
+    padding-left: 0.875rem;
+    border-left: 1px solid var(--color-border);
+    max-width: 44ch;
+  }
+
+  .actions {
+    display: flex;
+    gap: 1.75rem;
+    margin: 2.25rem 0 0;
+    flex-wrap: wrap;
+  }
+
+  :global(.error-article .link) {
+    background: none;
+    border: none;
+    padding: 0;
+    font: inherit;
+    font-size: 0.95rem;
+    cursor: pointer;
+    color: var(--color-text-secondary);
+    position: relative;
+    transition: color var(--transition-normal, 200ms ease);
+  }
+
+  :global(.error-article .link::after) {
+    content: "";
+    position: absolute;
+    left: 0;
+    right: 0;
+    bottom: -2px;
+    height: 1px;
+    background: currentColor;
+    opacity: 0.35;
+    transition: opacity var(--transition-normal, 200ms ease);
+  }
+
+  :global(.error-article .link:hover) { color: var(--color-text-primary); }
+  :global(.error-article .link:hover::after) { opacity: 1; }
+
+  :global(.error-article .link-primary) { color: var(--color-primary); }
+  :global(.error-article .link-primary:hover) {
+    color: var(--color-primary-hover, var(--color-primary));
+  }
+
+  .rule {
+    border: none;
+    border-top: 1px solid var(--color-border);
+    margin: 4rem 0 2.5rem;
+    width: 3rem;
+  }
+
+  .quote {
+    margin: 0;
+  }
+
+  .quote-text {
+    font-family: Georgia, "Times New Roman", Cambria, serif;
+    font-style: italic;
+    font-size: clamp(1.25rem, 2.2vw, 1.625rem);
+    line-height: 1.5;
+    color: var(--color-text-primary);
+    margin: 0 0 1rem;
+    text-wrap: balance;
+    hyphens: auto;
+  }
+
+  .quote-reference {
+    font-size: 0.75rem;
+    font-weight: 500;
+    letter-spacing: 0.18em;
+    text-transform: uppercase;
+    color: var(--color-text-tertiary);
+  }
+
+  @media (max-width: 560px) {
+    .actions { gap: 1.25rem; }
+    .rule { margin: 3rem 0 2rem; }
+  }
+</style>

src/lib/components/SectionError.svelte

@@ -0,0 +1,59 @@
+<script lang="ts">
+  import { page } from '$app/stores';
+  import { goto } from '$app/navigation';
+  import ErrorView from './ErrorView.svelte';
+  import { getErrorTitle, getErrorDescription, errorLabels, pick } from '$lib/js/errorStrings';
+  import type { Snippet } from 'svelte';
+
+  interface Props {
+    /** Destination of the section's primary "home" link, e.g. "/rezepte" */
+    sectionHref: string;
+    /** Label for that link in both languages */
+    sectionLabel: { en: string; de: string };
+    /** Override language detection (defaults to error.lang from handleError) */
+    isEnglish?: boolean;
+    /** Extra action buttons rendered before the defaults */
+    extraActions?: Snippet;
+  }
+
+  let { sectionHref, sectionLabel, isEnglish: isEnglishProp, extraActions }: Props = $props();
+
+  let status = $derived($page.status);
+  let error = $derived($page.error as any);
+  let bibleQuote = $derived(error?.bibleQuote);
+  let detectedEnglish = $derived(error?.lang === 'en');
+  let isEnglish = $derived(isEnglishProp ?? detectedEnglish);
+  let details = $derived(error?.details);
+
+  let label = $derived(pick(sectionLabel, isEnglish));
+
+  function goBack() {
+    if (window.history.length > 1) window.history.back();
+    else goto(sectionHref);
+  }
+  function login() { goto('/login'); }
+</script>
+
+<ErrorView
+  {status}
+  title={getErrorTitle(status, isEnglish)}
+  description={getErrorDescription(status, isEnglish)}
+  {details}
+  {bibleQuote}
+  {isEnglish}
+>
+  {#snippet actions()}
+    {#if extraActions}{@render extraActions()}{/if}
+
+    {#if status === 401}
+      <button class="link link-primary" onclick={login}>{pick(errorLabels.login, isEnglish)}</button>
+      <a class="link" href={sectionHref}>{label}</a>
+    {:else if status === 500}
+      <button class="link link-primary" onclick={goBack}>{pick(errorLabels.tryAgain, isEnglish)}</button>
+      <a class="link" href={sectionHref}>{label}</a>
+    {:else}
+      <a class="link link-primary" href={sectionHref}>{label}</a>
+      <button class="link" onclick={goBack}>{pick(errorLabels.goBack, isEnglish)}</button>
+    {/if}
+  {/snippet}
+</ErrorView>