add Zustand and del unnecessary files

locationStore.js

@@ -0,0 +1,75 @@
+import { create } from "zustand";
+import * as api from "@/api/locations";
+
+const useLocationStore = create((set, get) => ({
+  locations: [],
+  loading: false,
+  error: null,
+
+  fetchLocations: async () => {
+    set({ loading: true, error: null });
+    try {
+      const data = await api.listLocations();
+      set({ locations: data, loading: false });
+    } catch (error) {
+      set({ error, loading: false });
+    }
+  },
+
+  addLocation: async (location) => {
+    set({ loading: true, error: null });
+    try {
+      const newLoc = await api.addLocation(location);
+      set((state) => ({
+        locations: [...state.locations, newLoc],
+        loading: false,
+      }));
+      return newLoc;
+    } catch (error) {
+      set({ error, loading: false });
+      return null;
+    }
+  },
+
+  updateLocation: async (id, location) => {
+    set({ loading: true, error: null });
+    try {
+      const updated = await api.updateLocation(id, location);
+      set((state) => ({
+        locations: state.locations.map((loc) =>
+          loc.id == id ? updated : loc
+        ),
+        
+        loading: false,
+      }));
+
+      return updated;
+    } catch (error) {
+      set({ error, loading: false });
+      return null;
+    }
+  },
+
+  deleteLocation: async (id) => {
+    set({ loading: true, error: null });
+    try {
+      const deleted = await api.deleteLocation(id);
+      set((state) => ({
+        locations: state.locations.filter((loc) => loc.id != id),
+        loading: false,
+      }));
+      if(deleted) {
+        return true;
+      }
+    } catch (error) {
+      set({ error, loading: false });
+      return false;
+    }
+  },
+
+  getLocation: (id) => {
+    return get().locations.find((loc) => String(loc.id) === String(id));
+  },
+}));
+
+export default useLocationStore;