refactor(planner): import shared types in DesktopDayTile instead of re-declaring

Removes local TagItem, SlotRecipe, Slot, Suggestion interfaces and
imports Recipe, Slot, Suggestion from types.ts.

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

frontend/src/lib/planner/DesktopDayTile.svelte

@@ -1,33 +1,7 @@
 <script lang="ts">
 	import EmptyDayTile from './EmptyDayTile.svelte';
 	import { formatDayAbbr } from '$lib/planner/week';
-
-	interface TagItem {
-		id?: string;
-		name?: string;
-		tagType?: string;
-	}
-
-	interface SlotRecipe {
-		id?: string;
-		name?: string;
-		effort?: string;
-		cookTimeMin?: number;
-		heroImageUrl?: string | null;
-		tags?: TagItem[];
-	}
-
-	interface Slot {
-		id?: string | null;
-		slotDate?: string;
-		recipe?: SlotRecipe | null;
-	}
-
-	interface Suggestion {
-		recipe: any;
-		scoreDelta: number;
-		hasConflict: boolean;
-	}
+	import type { Recipe, Slot, Suggestion } from '$lib/planner/types';
 
 	let {
 		slot,