Added sidebar

app/contexts/FavoritesContext.js

@@ -0,0 +1,53 @@
+'use client';
+
+import { createContext, useContext, useState, useEffect } from 'react';
+
+const FavoritesContext = createContext();
+
+export const useFavorites = () => {
+  const context = useContext(FavoritesContext);
+  if (!context) {
+    throw new Error('useFavorites must be used within FavoritesProvider');
+  }
+  return context;
+};
+
+export const FavoritesProvider = ({ children }) => {
+  const [favorites, setFavorites] = useState([]);
+
+  useEffect(() => {
+    const stored = localStorage.getItem('favorites');
+    if (stored) {
+      try {
+        setFavorites(JSON.parse(stored));
+      } catch (e) {
+        console.error('Failed to parse favorites', e);
+      }
+    }
+  }, []);
+
+  useEffect(() => {
+    localStorage.setItem('favorites', JSON.stringify(favorites));
+  }, [favorites]);
+
+  const addFavorite = (property) => {
+    setFavorites(prev => {
+      if (prev.some(p => p.id === property.id)) return prev;
+      return [...prev, property];
+    });
+  };
+
+  const removeFavorite = (propertyId) => {
+    setFavorites(prev => prev.filter(p => p.id !== propertyId));
+  };
+
+  const isFavorite = (propertyId) => {
+    return favorites.some(p => p.id === propertyId);
+  };
+
+  return (
+    <FavoritesContext.Provider value={{ favorites, addFavorite, removeFavorite, isFavorite }}>
+      {children}
+    </FavoritesContext.Provider>
+  );
+};