add state management and other stuff

src/store/useBuildStore.ts

@@ -0,0 +1,53 @@
+import { create, StateCreator } from 'zustand';
+import { persist } from 'zustand/middleware';
+
+export interface BuildPart {
+  id: string;
+  name: string;
+  image_url: string;
+  brand: {
+    id: string;
+    name: string;
+    logo?: string;
+  };
+  category: {
+    id: string;
+    name: string;
+  };
+  offers: Array<{
+    price: number;
+    url: string;
+    vendor: {
+      name: string;
+      logo?: string;
+    };
+    inStock?: boolean;
+    shipping?: string;
+  }>;
+}
+
+export interface BuildState {
+  selectedParts: Record<string, BuildPart | null>; // key: checklist component id
+  selectPartForComponent: (componentId: string, part: BuildPart) => void;
+  removePartForComponent: (componentId: string) => void;
+  clearBuild: () => void;
+}
+
+const buildStoreCreator: StateCreator<BuildState> = (set) => ({
+  selectedParts: {},
+  selectPartForComponent: (componentId, part) => set((state) => ({
+    selectedParts: { ...state.selectedParts, [componentId]: part },
+  })),
+  removePartForComponent: (componentId) => set((state) => {
+    const updated = { ...state.selectedParts };
+    delete updated[componentId];
+    return { selectedParts: updated };
+  }),
+  clearBuild: () => set({ selectedParts: {} }),
+});
+
+export const useBuildStore = create<BuildState>()(
+  persist(buildStoreCreator, {
+    name: 'current-build-storage',
+  })
+);