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

Removes local TagItem, Recipe, SlotRecipe, Slot, SlotMap definitions
and imports Recipe, Slot, SlotMap from types.ts.

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

frontend/src/lib/planner/reasoningTags.ts

@@ -1,36 +1,11 @@
+import type { Recipe, Slot, SlotMap } from '$lib/planner/types';
+
 export interface ReasoningTag {
 	id: 'neues-protein' | 'aufwand-leicht';
 	label: string;
 	color: 'green' | 'yellow';
 }
 
-interface TagItem {
-	id?: string;
-	name?: string;
-	tagType?: string;
-}
-
-interface Recipe {
-	id: string;
-	name: string;
-	cookTimeMin?: number;
-	effort?: string;
-	tags?: TagItem[];
-}
-
-interface SlotRecipe {
-	id?: string;
-	tags?: TagItem[];
-}
-
-interface Slot {
-	id?: string;
-	slotDate?: string;
-	recipe?: SlotRecipe | null;
-}
-
-type SlotMap = Record<string, Slot>;
-
 export function computeReasoningTags(slotMap: SlotMap, recipe: Recipe): ReasoningTag[] {
 	const tags: ReasoningTag[] = [];