feat(footer, header, landing): enhance UI components and improve navigation

- Updated Footer component with new links and dynamic year display.
- Refactored Header component to improve mobile navigation and theme toggling.
- Enhanced DonationSection and Features components with improved layout and animations.
- Updated HowItWorks and Impact sections for better user engagement and clarity.
- Improved product page layout and error handling in API interactions.
- General UI refinements across various components for a cohesive user experience.

hooks/use-search-logic.ts

@@ -0,0 +1,25 @@
+"use client";
+
+import { useState, useEffect } from "react";
+import { detectSearchType, isValidBarcode } from "@/lib/openFoodFactsApi";
+
+// Definimos o tipo de união para garantir segurança de índice
+export type SearchType = "auto" | "barcode" | "name";
+
+export function useSearchLogic(query: string) {
+  const [searchType, setSearchType] = useState<SearchType>("auto");
+  const [loading, setLoading] = useState(false);
+
+  useEffect(() => {
+    if (query.trim()) {
+      const detected = detectSearchType(query) as SearchType;
+      setSearchType(detected);
+    } else {
+      setSearchType("auto");
+    }
+  }, [query]);
+
+  const isValid = searchType === "barcode" ? isValidBarcode(query) : true;
+
+  return { searchType, isValid, loading, setLoading };
+}