feat(planner): overhaul desktop layout — flip tiles, no right panel

Replaces 3-panel layout with 2-panel (sidebar + full-width grid):
- Remove persistent right panel and toolbar + Gericht hinzufügen button
- grid-cols-7 tiles use DesktopDayTile (CSS 3D card flip)
- RecipePickerDrawer slides in on tile CTA / Gericht tauschen
- Page-owned activeSlotId + drawerOpen/drawerSlotId state
- Single Escape handler: drawer > flip priority
- Extend server load to forward recipe tags from /v1/recipes API

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

frontend/src/routes/(app)/planner/+page.server.ts

@@ -21,7 +21,8 @@ export const load: PageServerLoad = async ({ fetch, url }) => {
 					name: r.name!,
 					cookTimeMin: r.cookTimeMin,
 					effort: r.effort,
-					heroImageUrl: r.heroImageUrl
+					heroImageUrl: r.heroImageUrl,
+					tags: (r.tags ?? []).map((t: any) => ({ id: t.id, name: t.name, tagType: t.tagType }))
 				}));
 
 	if (weekPlanResult.error || !weekPlanResult.data?.id) {

frontend/src/routes/(app)/planner/+page.svelte

@@ -5,7 +5,9 @@
 	import VarietyScoreCard from '$lib/planner/VarietyScoreCard.svelte';
 	import WeekStrip from '$lib/planner/WeekStrip.svelte';
 	import DayMealCard from '$lib/planner/DayMealCard.svelte';
+	import DesktopDayTile from '$lib/planner/DesktopDayTile.svelte';
 	import RecipePicker from '$lib/planner/RecipePicker.svelte';
+	import RecipePickerDrawer from '$lib/planner/RecipePickerDrawer.svelte';
 	import MealActionSheet from '$lib/planner/MealActionSheet.svelte';
 	import BottomSheet from '$lib/components/BottomSheet.svelte';
 	import UndoBar from '$lib/planner/UndoBar.svelte';
@@ -49,35 +51,27 @@
 
 	let weekRange = $derived(formatWeekRange(weekStart));
 
-	// Desktop right panel state machine
-	type PanelState =
-		| { kind: 'idle' }
-		| { kind: 'day-detail'; date: string }
-		| { kind: 'recipe-picker'; date: string };
-
-	let panelState = $state<PanelState>({ kind: 'idle' });
-
 	// Mobile bottom sheet for RecipePicker (empty slot) and swap flow
 	let pickerOpen = $state(false);
 	let actionSheetOpen = $state(false);
 	let swapSheetOpen = $state(false);
 	let swapLoading = $state(false);
 
+	// Desktop flip tile + drawer state (page-owned per Kai's architecture decision)
+	let activeSlotId = $state<string | null>(null);
+	let drawerOpen = $state(false);
+	let drawerSlotId = $state<string | null>(null);
+
 	const activePickerDate = $derived(
 		pickerOpen ? selectedDay
 		: swapSheetOpen ? selectedDay
-		: panelState.kind === 'recipe-picker' ? panelState.date
+		: drawerOpen && drawerSlotId ? drawerSlotId
 		: null
 	);
 
 	let suggestions: Suggestion[] = $state([]);
 	let isLoadingSuggestions = $state(false);
 
-	// Recipes already in any slot this week — used for ⚠ overlap warnings
-	let currentWeekRecipeIds = $derived(
-		new Set<string>(slots.filter((s: any) => s.recipe?.id).map((s: any) => s.recipe.id))
-	);
-
 	// Hidden form field bindings
 	let addPlanId = $state('');
 	let addSlotDate = $state('');
@@ -115,9 +109,23 @@
 		return () => controller.abort();
 	});
 
+	// Single Escape key handler — priority: drawer > flip (Kai architecture decision)
+	$effect(() => {
+		function handleKeydown(e: KeyboardEvent) {
+			if (e.key !== 'Escape') return;
+			if (drawerOpen) {
+				drawerOpen = false;
+				drawerSlotId = null;
+			} else if (activeSlotId) {
+				activeSlotId = null;
+			}
+		}
+		window.addEventListener('keydown', handleKeydown);
+		return () => window.removeEventListener('keydown', handleKeydown);
+	});
+
 	function handleSelectDay(day: string) {
 		selectedDay = day;
-		panelState = { kind: 'day-detail', date: day };
 	}
 
 	async function navigateWeek(direction: 'prev' | 'next' | 'today') {
@@ -130,14 +138,13 @@
 	}
 
 	async function handleRecipePick(recipeId: string, recipeName: string) {
-		// Capture date before modifying panel state
-		const date = panelState.kind === 'recipe-picker' ? panelState.date : selectedDay;
+		// Drawer date takes priority (desktop), then mobile picker date
+		const date = drawerOpen && drawerSlotId ? drawerSlotId : selectedDay;
 
-		// Close pickers
+		// Close all pickers
 		pickerOpen = false;
-		if (panelState.kind === 'recipe-picker') {
-			panelState = { kind: 'idle' };
-		}
+		drawerOpen = false;
+		drawerSlotId = null;
 
 		const existingSlot = slotMap[date];
 
@@ -196,17 +203,39 @@
 		swapLoading = false;
 	}
 
-	function closePanelToIdle() {
-		panelState = { kind: 'idle' };
+	// Desktop tile handlers
+	function handleTileFlip(slotId: string) {
+		activeSlotId = slotId;
 	}
 
-	function closePanelToDayDetail() {
-		if (panelState.kind === 'recipe-picker') {
-			panelState = { kind: 'day-detail', date: panelState.date };
-		} else {
-			panelState = { kind: 'idle' };
-		}
+	function handleTileClose() {
+		activeSlotId = null;
 	}
+
+	function handleTileSwap(slotDate: string) {
+		activeSlotId = null;
+		drawerSlotId = slotDate;
+		drawerOpen = true;
+	}
+
+	async function handleTileRemove(slot: any) {
+		activeSlotId = null;
+		await handleRemoveMeal(slot);
+	}
+
+	function handleEmptyTileAdd(slotDate: string) {
+		drawerSlotId = slotDate;
+		drawerOpen = true;
+	}
+
+	const drawerSlot = $derived(drawerSlotId ? (slotMap[drawerSlotId] ?? null) : null);
+	const drawerReplacingMeta = $derived(
+		drawerSlot?.recipe
+			? [drawerSlot.recipe.cookTimeMin ? `${drawerSlot.recipe.cookTimeMin} Min` : null, drawerSlot.recipe.effort ?? null]
+					.filter(Boolean)
+					.join(' · ')
+			: null
+	);
 </script>
 
 <!-- Mobile & Tablet: vertical stack -->
@@ -369,7 +398,7 @@
 	</BottomSheet>
 </div>
 
-<!-- Desktop: 3-panel layout -->
+<!-- Desktop: 2-panel layout (sidebar + full-width flip-tile grid) -->
 <div class="hidden h-screen lg:flex lg:flex-col">
 	<!-- Topbar -->
 	<header class="flex items-center gap-4 border-b border-[var(--color-border)] bg-[var(--color-page)] px-6 py-4">
@@ -400,21 +429,11 @@
 				Heute
 			</button>
 		</div>
-		{#if isPlanner}
-			<button
-				type="button"
-				onclick={() => (panelState = { kind: 'recipe-picker', date: selectedDay })}
-				class="ml-auto rounded-[var(--radius-md)] bg-[var(--green-dark)] px-4 py-2 text-[13px] font-medium tracking-[0.04em] font-[var(--font-sans)] text-white"
-			>
-				+ Gericht hinzufügen
-			</button>
-		{/if}
 	</header>
 
 	<div class="flex flex-1 overflow-hidden">
-		<!-- Left sidebar -->
+		<!-- Left sidebar (unchanged) -->
 		<aside class="flex w-[224px] flex-shrink-0 flex-col border-r border-[var(--color-border)] bg-[var(--color-surface)] p-4">
-			<!-- Variety widget at bottom -->
 			{#if varietyScore}
 				<div class="mt-auto">
 					<VarietyScoreCard
@@ -426,8 +445,8 @@
 			{/if}
 		</aside>
 
-		<!-- Main calendar (only scrollable panel) -->
-		<main class="flex-1 overflow-y-auto p-5">
+		<!-- Main grid — full width, full height -->
+		<main class="flex-1 overflow-hidden p-5">
 			{#if !weekPlan}
 				<div class="flex h-full flex-col items-center justify-center">
 					<p class="font-[var(--font-sans)] text-[14px] text-[var(--color-text-muted)]">Noch kein Wochenplan für diese Woche.</p>
@@ -441,198 +460,65 @@
 					{/if}
 				</div>
 			{:else}
-				<div class="grid grid-cols-7 gap-[8px]">
+				<div class="grid h-full grid-cols-7 gap-2">
 					{#each days as day (day)}
 						{@const slot = slotMap[day] ?? { id: null, slotDate: day, recipe: null }}
 						{@const isTodayDay = day === today}
-						{@const isSelectedDay = day === selectedDay}
 						{@const dateNum = day.slice(-2).replace(/^0/, '')}
 						{@const dayAbbr = formatDayAbbr(day, 'narrow')}
+						{@const isThisTileActive = drawerSlotId === day}
 
-						<div class="flex flex-col">
-							<!-- Column header: day name + date badge -->
+						<div class="flex h-full flex-col">
+							<!-- Column header -->
 							<div class="mb-2 flex flex-col items-center gap-1">
 								<p class="font-[var(--font-sans)] text-[9px] uppercase tracking-wide text-[var(--color-text-muted)]">
 									{dayAbbr}
 								</p>
 								<div
 									class="flex h-6 w-6 items-center justify-center rounded-full text-[11px] font-medium
-										{isTodayDay ? 'bg-[var(--yellow)] text-white' : ''}
-										{isSelectedDay && !isTodayDay ? 'bg-[var(--green-tint)] text-[var(--green-dark)]' : ''}
-										{!isTodayDay && !isSelectedDay ? 'bg-transparent text-[var(--color-text)]' : ''}"
+										{isTodayDay ? 'bg-[var(--yellow)] text-white' : 'bg-transparent text-[var(--color-text)]'}"
 								>
 									{dateNum}
 								</div>
 							</div>
 
-							<!-- Meal tile -->
-							<button
-								type="button"
-								onclick={() => {
-									handleSelectDay(day);
-									if (!slot.recipe && isPlanner) {
-										panelState = { kind: 'recipe-picker', date: day };
-									}
-								}}
-								aria-label={slot.recipe ? slot.recipe.name : `Gericht wählen für ${formatDayLabel(day)}`}
-								class="flex flex-1 flex-col rounded-[var(--radius-lg)] border p-2 text-left shadow-[var(--shadow-card)] transition-all hover:border-[var(--green-light)] hover:shadow-[var(--shadow-raised)]
-									{slot.recipe && !isTodayDay && !isSelectedDay ? 'border-[var(--color-border)] bg-[var(--color-surface)]' : ''}
-									{isTodayDay && slot.recipe ? 'border-2 border-[var(--yellow)] bg-[var(--yellow-tint)]' : ''}
-									{isSelectedDay && !isTodayDay && slot.recipe ? 'border-2 border-[var(--green)] bg-[var(--green-tint)]' : ''}
-									{!slot.recipe ? 'border-dashed border-[var(--color-border)] bg-transparent' : ''}"
-							>
-								{#if slot.recipe}
-									<p class="font-[var(--font-display)] text-[13px] font-[300] leading-tight text-[var(--color-text)]">
-										{slot.recipe.name}
-									</p>
-								{:else}
-									<div class="flex flex-1 flex-col items-center justify-center py-4 text-[var(--color-text-muted)]">
-										<span class="text-[18px]" aria-hidden="true">+</span>
-										<span class="font-[var(--font-sans)] text-[11px]">Gericht wählen</span>
-									</div>
-								{/if}
-							</button>
+							<!-- Flip tile -->
+							<div class="min-h-0 flex-1">
+								<DesktopDayTile
+									{slot}
+									isToday={isTodayDay}
+									{activeSlotId}
+									{isPlanner}
+									{slotMap}
+									{suggestions}
+									topSuggestion={isThisTileActive && suggestions.length > 0 ? suggestions[0] : undefined}
+									onflip={handleTileFlip}
+									onclose={handleTileClose}
+									onswap={() => handleTileSwap(day)}
+									onremove={() => handleTileRemove(slot)}
+									onaddrecipe={() => handleEmptyTileAdd(day)}
+								/>
+							</div>
 						</div>
 					{/each}
 				</div>
 			{/if}
 		</main>
-
-		<!-- Right detail panel -->
-		<aside class="flex w-[280px] flex-shrink-0 flex-col border-l border-[var(--color-border)] bg-[var(--color-page)] p-4">
-			{#if panelState.kind === 'idle'}
-				<div class="flex flex-1 flex-col items-center justify-center">
-					<p class="font-[var(--font-sans)] text-[14px] text-[var(--color-text-muted)]">Kein Tag ausgewählt</p>
-				</div>
-
-			{:else if panelState.kind === 'day-detail'}
-				{@const detailDate = panelState.date}
-				{@const detailSlot = slotMap[detailDate] ?? { id: null, slotDate: detailDate, recipe: null }}
-
-				<!-- Panel header with close button -->
-				<div class="mb-3 flex items-start justify-between">
-					<p class="font-[var(--font-sans)] text-[12px] font-medium uppercase tracking-wide text-[var(--color-text-muted)]">
-						{formatDayLabel(detailDate)} · Abendessen
-					</p>
-					<button
-						type="button"
-						onclick={closePanelToIdle}
-						aria-label="Panel schließen"
-						class="ml-2 flex-shrink-0 text-[18px] leading-none text-[var(--color-text-muted)] hover:text-[var(--color-text)]"
-					>
-						×
-					</button>
-				</div>
-
-				{#if detailSlot.recipe}
-					<h2 class="font-[var(--font-display)] text-[17px] font-[300] text-[var(--color-text)]">
-						{detailSlot.recipe.name}
-					</h2>
-					{#if detailSlot.recipe.effort || detailSlot.recipe.cookTimeMin}
-						<p class="mt-1 font-[var(--font-sans)] text-[13px] text-[var(--color-text-muted)]">
-							{[detailSlot.recipe.cookTimeMin ? `${detailSlot.recipe.cookTimeMin} Min` : null, detailSlot.recipe.effort].filter(Boolean).join(' · ')}
-						</p>
-					{/if}
-
-					<div class="mt-4 space-y-2">
-						<a
-							href="/recipes/{detailSlot.recipe.id}"
-							class="block rounded-[var(--radius-md)] border border-[var(--color-border)] px-3 py-2 text-center text-[13px] font-medium tracking-[0.04em] font-[var(--font-sans)] text-[var(--color-text)] hover:bg-[var(--color-surface)]"
-						>
-							Rezept ansehen
-						</a>
-						<a
-							href="/recipes/{detailSlot.recipe.id}/cook"
-							class="block rounded-[var(--radius-md)] bg-[var(--green-dark)] px-3 py-2 text-center text-[13px] font-medium tracking-[0.04em] font-[var(--font-sans)] text-white"
-						>
-							Koch-Modus
-						</a>
-						{#if isPlanner}
-							<button
-								type="button"
-								onclick={() => (panelState = { kind: 'recipe-picker', date: detailDate })}
-								class="block w-full rounded-[var(--radius-md)] border border-[var(--color-border)] px-3 py-2 text-center text-[13px] font-medium tracking-[0.04em] font-[var(--font-sans)] text-[var(--color-text)] hover:bg-[var(--color-surface)]"
-							>
-								Gericht tauschen
-							</button>
-							{#if detailSlot.id}
-								<button
-									type="button"
-									onclick={() => { handleRemoveMeal(detailSlot as any); panelState = { kind: 'idle' }; }}
-									class="block w-full rounded-[var(--radius-md)] border border-[var(--color-error,#d9534f)] px-3 py-2 text-center text-[13px] font-medium tracking-[0.04em] font-[var(--font-sans)] text-[var(--color-error,#d9534f)] hover:bg-[var(--color-surface)]"
-								>
-									Entfernen
-								</button>
-							{/if}
-						{/if}
-					</div>
-				{:else}
-					<p class="font-[var(--font-sans)] text-[14px] text-[var(--color-text-muted)]">Kein Gericht geplant</p>
-					{#if isPlanner}
-						<button
-							type="button"
-							onclick={() => (panelState = { kind: 'recipe-picker', date: detailDate })}
-							class="mt-3 block w-full rounded-[var(--radius-md)] border border-dashed border-[var(--color-border)] px-3 py-2 text-center text-[13px] font-medium tracking-[0.04em] font-[var(--font-sans)] text-[var(--color-text-muted)]"
-						>
-							+ Gericht wählen
-						</button>
-					{/if}
-				{/if}
-
-			{:else if panelState.kind === 'recipe-picker'}
-				{@const pickerDate = panelState.date}
-				{@const pickerSlot = slotMap[pickerDate] ?? null}
-				{@const isSwapContext = !!pickerSlot?.recipe}
-
-				<!-- Panel header with back/close button -->
-				<div class="mb-3 flex items-center justify-between">
-					<p class="font-[var(--font-sans)] text-[12px] font-medium uppercase tracking-wide text-[var(--color-text-muted)]">
-						{isSwapContext ? 'Gericht tauschen' : 'Rezept wählen'}
-					</p>
-					<button
-						type="button"
-						onclick={closePanelToDayDetail}
-						aria-label="Zurück"
-						class="ml-2 flex-shrink-0 text-[18px] leading-none text-[var(--color-text-muted)] hover:text-[var(--color-text)]"
-					>
-						×
-					</button>
-				</div>
-
-				{#if isSwapContext}
-					{@const replacingMeta = [
-						pickerSlot.recipe.cookTimeMin ? `${pickerSlot.recipe.cookTimeMin} Min` : null,
-						pickerSlot.recipe.effort ?? null
-					].filter(Boolean).join(' · ')}
-					<div class="flex-1 overflow-y-auto -mx-4 -mb-4">
-						<RecipePicker
-							planId={weekPlan?.id ?? ''}
-							date={pickerDate}
-							dateLabel={formatDayLabel(pickerDate)}
-							suggestions={suggestions}
-							allRecipes={data.recipes}
-							isLoading={isLoadingSuggestions}
-							excludeRecipeId={pickerSlot.recipe.id}
-							replacingRecipe={{ name: pickerSlot.recipe.name, meta: replacingMeta || undefined }}
-							onpick={handleRecipePick}
-						/>
-					</div>
-				{:else}
-					<div class="flex-1 overflow-y-auto -mx-4 -mb-4">
-						<RecipePicker
-							planId={weekPlan?.id ?? ''}
-							date={pickerDate}
-							dateLabel={formatDayLabel(pickerDate)}
-							suggestions={suggestions}
-							allRecipes={data.recipes}
-							isLoading={isLoadingSuggestions}
-							onpick={handleRecipePick}
-						/>
-					</div>
-				{/if}
-			{/if}
-		</aside>
 	</div>
+
+	<!-- Recipe picker drawer (slide-in from right) -->
+	<RecipePickerDrawer
+		open={drawerOpen}
+		slotDate={drawerSlotId ?? ''}
+		planId={weekPlan?.id ?? ''}
+		{suggestions}
+		allRecipes={data.recipes}
+		isLoading={isLoadingSuggestions}
+		onpick={handleRecipePick}
+		onclose={() => { drawerOpen = false; drawerSlotId = null; }}
+		excludeRecipeId={drawerSlot?.recipe?.id}
+		replacingRecipe={drawerSlot?.recipe ? { name: drawerSlot.recipe.name, meta: drawerReplacingMeta || undefined } : undefined}
+	/>
 </div>
 
 <!-- Hidden forms for slot mutations -->