feat(decks): Edit-Icon auf Deck-Karten + Deck-Edit-Page

- DeckStack: Pencil-Icon absolut unten-rechts, erscheint beim Hover
  (z-index über Card, ausserhalb des <a>-Links zur Detail-Page)
- Neuer Route /decks/[id]/edit: Form für Name, Beschreibung, Farbe
- i18n deck_edit keys (de + en)

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

apps/web/src/lib/components/DeckStack.svelte

@@ -5,6 +5,7 @@
 	import { t, tn } from '$lib/i18n/index.svelte.ts';
 	import CardSurface from './CardSurface.svelte';
 	import DeckCategoryIcon from './DeckCategoryIcon.svelte';
+	import { PencilSimple } from '@mana/shared-icons';
 
 	interface Props {
 		deck: Deck;
@@ -43,6 +44,16 @@
 		{/each}
 	{/if}
 
+	<a
+		href="/decks/{deck.id}/edit"
+		class="edit-btn"
+		onclick={(e) => e.stopPropagation()}
+		aria-label="Deck bearbeiten"
+		title="Deck bearbeiten"
+	>
+		<PencilSimple size={13} weight="bold" />
+	</a>
+
 	<CardSurface
 		size="md"
 		as={href ? 'a' : 'button'}
@@ -170,4 +181,34 @@
 		border-style: dashed;
 		background: transparent;
 	}
+
+	.edit-btn {
+		position: absolute;
+		bottom: 0.625rem;
+		right: 0.625rem;
+		z-index: 10;
+		width: 1.625rem;
+		height: 1.625rem;
+		border-radius: 0.375rem;
+		background: hsl(var(--color-surface) / 0.92);
+		border: 1px solid hsl(var(--color-border));
+		display: flex;
+		align-items: center;
+		justify-content: center;
+		color: hsl(var(--color-muted-foreground));
+		text-decoration: none;
+		opacity: 0;
+		transition: opacity 0.15s, color 0.12s, background 0.12s, border-color 0.12s;
+		backdrop-filter: blur(4px);
+	}
+
+	.stack-wrap:hover .edit-btn {
+		opacity: 1;
+	}
+
+	.edit-btn:hover {
+		color: hsl(var(--color-foreground));
+		background: hsl(var(--color-surface));
+		border-color: hsl(var(--color-primary) / 0.5);
+	}
 </style>

apps/web/src/lib/i18n/de.ts

@@ -57,6 +57,18 @@ export const de: TranslationNode = {
 	deck_stack: {
 		aria_label: 'Stapel "{name}" — {cards} Karten, {due} fällig',
 	},
+	deck_edit: {
+		title: 'Deck bearbeiten',
+		back: '← Zurück zum Deck',
+		name_label: 'Name',
+		description_label: 'Beschreibung (optional)',
+		color_label: 'Farbe',
+		save: 'Speichern',
+		saving: 'Speichere…',
+		cancel: 'Abbrechen',
+		save_failed: 'Speichern fehlgeschlagen: {msg}',
+		saved: 'Deck gespeichert',
+	},
 	deck_new: {
 		title: 'Neues Deck',
 		name_label: 'Name',

apps/web/src/lib/i18n/en.ts

@@ -54,6 +54,18 @@ export const en: TranslationNode = {
 	deck_stack: {
 		aria_label: 'Stack "{name}" — {cards} cards, {due} due',
 	},
+	deck_edit: {
+		title: 'Edit deck',
+		back: '← Back to deck',
+		name_label: 'Name',
+		description_label: 'Description (optional)',
+		color_label: 'Color',
+		save: 'Save',
+		saving: 'Saving…',
+		cancel: 'Cancel',
+		save_failed: 'Save failed: {msg}',
+		saved: 'Deck saved',
+	},
 	deck_new: {
 		title: 'New deck',
 		name_label: 'Name',

apps/web/src/routes/decks/[id]/edit/+page.svelte

@@ -0,0 +1,233 @@
+<script lang="ts">
+	import { onMount } from 'svelte';
+	import { page } from '$app/state';
+	import { goto } from '$app/navigation';
+	import { getDeck, updateDeck } from '$lib/api/decks.ts';
+	import { devUser } from '$lib/auth/dev-stub.svelte.ts';
+	import { toasts } from '$lib/stores/toasts.svelte.ts';
+	import { t } from '$lib/i18n/index.svelte.ts';
+
+	const deckId = $derived(page.params.id ?? '');
+
+	let name = $state('');
+	let description = $state('');
+	let color = $state('#6366f1');
+	let loading = $state(true);
+	let saving = $state(false);
+
+	onMount(async () => {
+		if (!devUser.id) { goto('/'); return; }
+		try {
+			const deck = await getDeck(deckId);
+			name = deck.name;
+			description = deck.description ?? '';
+			color = deck.color ?? '#6366f1';
+		} catch (e) {
+			toasts.error((e as Error).message);
+			goto(`/decks/${deckId}`);
+		} finally {
+			loading = false;
+		}
+	});
+
+	const canSave = $derived(!saving && name.trim().length > 0);
+
+	async function onSubmit(e: SubmitEvent) {
+		e.preventDefault();
+		if (!canSave) return;
+		saving = true;
+		try {
+			await updateDeck(deckId, {
+				name: name.trim(),
+				description: description.trim() || undefined,
+				color,
+			});
+			toasts.success(t('deck_edit.saved'));
+			goto(`/decks/${deckId}`);
+		} catch (e) {
+			toasts.error(t('deck_edit.save_failed', { msg: (e as Error).message }));
+			saving = false;
+		}
+	}
+</script>
+
+{#if !loading}
+<div class="page-shell">
+	<a href="/decks/{deckId}" class="back-link">{t('deck_edit.back')}</a>
+	<h1 class="page-title">{t('deck_edit.title')}</h1>
+
+	<form class="edit-form" onsubmit={onSubmit}>
+		<section class="form-section">
+			<label class="field">
+				<span class="field-label">{t('deck_edit.name_label')}</span>
+				<input
+					type="text"
+					bind:value={name}
+					required
+					maxlength="200"
+					placeholder="Deck-Name"
+					class="input"
+				/>
+			</label>
+
+			<label class="field">
+				<span class="field-label">{t('deck_edit.description_label')}</span>
+				<textarea
+					bind:value={description}
+					rows="3"
+					placeholder="Kurze Beschreibung…"
+					class="input"
+				></textarea>
+			</label>
+
+			<div class="field">
+				<span class="field-label">{t('deck_edit.color_label')}</span>
+				<div class="color-row">
+					<input type="color" bind:value={color} class="color-input" />
+					<span class="color-value">{color}</span>
+					<span class="color-preview" style="background:{color}" aria-hidden="true"></span>
+				</div>
+			</div>
+		</section>
+
+		<div class="actions">
+			<button type="submit" disabled={!canSave} class="btn-primary">
+				{saving ? t('deck_edit.saving') : t('deck_edit.save')}
+			</button>
+			<a href="/decks/{deckId}" class="btn-ghost">{t('deck_edit.cancel')}</a>
+		</div>
+	</form>
+</div>
+{/if}
+
+<style>
+	.page-shell {
+		max-width: 36rem;
+		margin: 0 auto;
+	}
+
+	.back-link {
+		display: inline-block;
+		font-size: 0.875rem;
+		color: hsl(var(--color-muted-foreground));
+		text-decoration: none;
+		transition: color 0.12s;
+	}
+	.back-link:hover { color: hsl(var(--color-foreground)); }
+
+	.page-title {
+		margin-top: 0.5rem;
+		margin-bottom: 1.5rem;
+		font-size: 1.5rem;
+		font-weight: 600;
+	}
+
+	.edit-form {
+		display: flex;
+		flex-direction: column;
+		gap: 1rem;
+	}
+
+	.form-section {
+		background: hsl(var(--color-card));
+		border: 1px solid hsl(var(--color-border));
+		border-radius: 0.75rem;
+		padding: 1.25rem;
+		display: flex;
+		flex-direction: column;
+		gap: 1.125rem;
+	}
+
+	.field {
+		display: flex;
+		flex-direction: column;
+		gap: 0.375rem;
+	}
+
+	.field-label {
+		font-size: 0.8125rem;
+		font-weight: 600;
+		letter-spacing: 0.01em;
+	}
+
+	.input {
+		display: block;
+		width: 100%;
+		border: 1px solid hsl(var(--color-border));
+		border-radius: 0.5rem;
+		background: hsl(var(--color-surface));
+		color: hsl(var(--color-foreground));
+		padding: 0.5rem 0.625rem;
+		font: inherit;
+		font-size: 0.875rem;
+		transition: border-color 0.12s, box-shadow 0.12s;
+		resize: vertical;
+	}
+	.input:focus {
+		outline: none;
+		border-color: hsl(var(--color-primary) / 0.6);
+		box-shadow: 0 0 0 3px hsl(var(--color-primary) / 0.1);
+	}
+
+	.color-row {
+		display: flex;
+		align-items: center;
+		gap: 0.75rem;
+	}
+
+	.color-input {
+		width: 3rem;
+		height: 2.25rem;
+		border-radius: 0.375rem;
+		border: 1px solid hsl(var(--color-border));
+		background: transparent;
+		cursor: pointer;
+		padding: 0.125rem;
+	}
+
+	.color-value {
+		font-size: 0.8125rem;
+		font-family: ui-monospace, monospace;
+		color: hsl(var(--color-muted-foreground));
+	}
+
+	.color-preview {
+		width: 1.5rem;
+		height: 1.5rem;
+		border-radius: 50%;
+		border: 1px solid hsl(var(--color-border));
+		flex-shrink: 0;
+	}
+
+	.actions {
+		display: flex;
+		align-items: center;
+		gap: 0.75rem;
+		padding-bottom: 1rem;
+	}
+
+	.btn-primary {
+		display: inline-flex;
+		align-items: center;
+		padding: 0.5rem 1.125rem;
+		border-radius: 0.5rem;
+		background: hsl(var(--color-primary));
+		color: hsl(var(--color-primary-foreground));
+		font: inherit;
+		font-size: 0.875rem;
+		font-weight: 500;
+		border: none;
+		cursor: pointer;
+		transition: background-color 0.12s;
+	}
+	.btn-primary:hover:not(:disabled) { background: hsl(var(--color-primary) / 0.88); }
+	.btn-primary:disabled { opacity: 0.45; cursor: default; }
+
+	.btn-ghost {
+		font-size: 0.875rem;
+		color: hsl(var(--color-muted-foreground));
+		text-decoration: none;
+		transition: color 0.12s;
+	}
+	.btn-ghost:hover { color: hsl(var(--color-foreground)); }
+</style>