feat(suggestions): C2 — Meal suggestions (variety-aware) (#40)

feat(suggestions): implement C2 meal suggestion screen (Issue #27)

Co-authored-by: Marcel Raddatz <marcel@raddatz.cloud>
Co-committed-by: Marcel Raddatz <marcel@raddatz.cloud>

frontend/src/lib/planner/SuggestionContextBanner.svelte

@@ -0,0 +1,86 @@
+<script lang="ts">
+	import { formatDayLabel } from './week';
+
+	interface SlotRecipe {
+		id?: string;
+		name?: string;
+		effort?: string;
+	}
+
+	interface Slot {
+		id?: string;
+		slotDate?: string;
+		recipe?: SlotRecipe | null;
+	}
+
+	interface WeekPlan {
+		id?: string;
+		weekStart?: string;
+		slots?: Slot[];
+	}
+
+	let {
+		selectedDay,
+		weekPlan
+	}: {
+		selectedDay: string;
+		weekPlan: WeekPlan | null;
+	} = $props();
+
+	let expanded = $state(false);
+
+	let slotsWithMeal = $derived(
+		(weekPlan?.slots ?? []).filter((s) => s.recipe && s.slotDate !== selectedDay)
+	);
+
+	function toggle() {
+		expanded = !expanded;
+	}
+</script>
+
+<div
+	data-testid="context-banner"
+	class="rounded-[var(--radius-md)] border border-[var(--green-light)] bg-[var(--green-tint)] px-4 py-3"
+>
+	<div class="flex items-center justify-between">
+		<p class="font-[var(--font-sans)] text-[12px] font-medium text-[var(--color-text)]">
+			Vorschläge für <strong>{formatDayLabel(selectedDay)}</strong>
+		</p>
+		<button
+			type="button"
+			onclick={toggle}
+			aria-expanded={expanded}
+			aria-controls="context-detail"
+			class="font-[var(--font-sans)] text-[12px] text-[var(--color-text-muted)] hover:text-[var(--color-text)]"
+		>
+			{expanded ? 'Filter ausblenden ▲' : 'Filter einblenden ▼'}
+		</button>
+	</div>
+
+	<div
+		id="context-detail"
+		data-testid="context-detail"
+		aria-hidden={!expanded}
+		{...expanded ? {} : { hidden: true }}
+	>
+		{#if slotsWithMeal.length > 0}
+			<div class="mt-3">
+				<p class="mb-1 font-[var(--font-sans)] text-[11px] uppercase tracking-wide text-[var(--color-text-muted)]">
+					Diese Woche bisher
+				</p>
+				<ul class="space-y-1">
+					{#each slotsWithMeal as slot}
+						<li class="flex gap-2 font-[var(--font-sans)] text-[12px] text-[var(--color-text)]">
+							<span class="text-[var(--color-text-muted)]">{formatDayLabel(slot.slotDate!).split(',')[0]}</span>
+							<span>{slot.recipe?.name}</span>
+						</li>
+					{/each}
+				</ul>
+			</div>
+		{:else}
+			<p class="mt-2 font-[var(--font-sans)] text-[12px] text-[var(--color-text-muted)]">
+				Noch keine Gerichte diese Woche geplant
+			</p>
+		{/if}
+	</div>
+</div>