Initial Version

frontend/src/types/index.ts

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+export interface Grocery {
+  id: number;
+  name: string;
+  price: number;
+  category: string;
+  organic: boolean;
+  weight?: number;
+  weight_unit: string;
+  created_at: string;
+  updated_at?: string;
+}
+
+export interface GroceryCreate {
+  name: string;
+  price: number;
+  category: string;
+  organic: boolean;
+  weight?: number;
+  weight_unit: string;
+}
+
+export interface Shop {
+  id: number;
+  name: string;
+  city: string;
+  address?: string;
+  created_at: string;
+}
+
+export interface ShopCreate {
+  name: string;
+  city: string;
+  address?: string;
+}
+
+export interface GroceryInEvent {
+  grocery_id: number;
+  amount: number;
+}
+
+export interface ShoppingEvent {
+  id: number;
+  shop_id: number;
+  date: string;
+  total_amount?: number;
+  notes?: string;
+  created_at: string;
+  shop: Shop;
+  groceries: Grocery[];
+}
+
+export interface ShoppingEventCreate {
+  shop_id: number;
+  date?: string;
+  total_amount?: number;
+  notes?: string;
+  groceries: GroceryInEvent[];
+}
+
+export interface CategoryStats {
+  category: string;
+  total_spent: number;
+  item_count: number;
+  avg_price: number;
+}
+
+export interface ShopStats {
+  shop_name: string;
+  total_spent: number;
+  visit_count: number;
+  avg_per_visit: number;
+}