refactor(product page, api): improve error handling and enhance type safety

- Refactored error handling in the product page to simplify catch block.
- Updated type definitions in openFoodFactsApi for better type safety.
- Introduced utility functions for search type detection and barcode validation.

app/produto/[barcode]/page.tsx

@@ -3,22 +3,22 @@
 import React, { useState, useEffect, useCallback } from "react";
 import { useParams, useRouter } from "next/navigation";
 import { motion, AnimatePresence } from "framer-motion";
-import { 
-  ArrowLeft, AlertCircle, AlertTriangle, 
-  Database, Globe, ShieldCheck, Beaker, ClipboardList 
+import {
+  ArrowLeft,
+  AlertCircle,
+  AlertTriangle,
+  Database,
+  Globe,
+  ShieldCheck,
+  Beaker,
+  ClipboardList,
 } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import Image from "next/image";
-import {
-  searchByBarcode,
-  Product,
-  formatNutritionData,
-} from "@/lib/openFoodFactsApi";
-import Link from "next/link";
+import { searchByBarcode, Product, formatNutritionData } from "@/lib/openFoodFactsApi";
 import { NutriScoreBadge, NovaBadge } from "@/app/components/NutriScoreBadge";
 import { NutritionGrid } from "@/app/components/NutritionBar";
 import { ProductSkeleton } from "@/app/components/ProductSkeleton";
-import { cn } from "@/lib/utils";
 
 export default function ProdutoPage() {
   const params = useParams();
@@ -36,7 +36,7 @@ export default function ProdutoPage() {
       const result = await searchByBarcode(barcode);
       if (result) setProduct(result);
       else setError("Produto não catalogado na base ODbL.");
-    } catch (err) {
+    } catch {
       setError("Falha crítica na sincronização de dados.");
     } finally {
       setLoading(false);

lib/openFoodFactsApi.ts

@@ -17,7 +17,7 @@ export interface Product {
     sugars_100g?: number;
     fiber_100g?: number;
     sodium_100g?: number;
-    [key: string]: any; // Flexibilidade para outros nutrientes
+    [key: string]: number | undefined; // Flexibilidade para outros nutrientes mantendo tipagem segura
   };
   nutrition_grades?: string;
   nova_group?: number;
@@ -240,8 +240,11 @@ export function formatNutritionData(p: Product) {
   const n = p.nutriments;
   if (!n) return null;
 
-  const fmt = (v: any, d: number = 1) => {
-    const num = parseFloat(v);
+  const fmt = (v: unknown, d: number = 1) => {
+    const num =
+      typeof v === "number"
+        ? v
+        : parseFloat(typeof v === "string" ? v : String(v));
     return isNaN(num) ? "N/A" : num.toFixed(d);
   };
 
@@ -253,4 +256,17 @@ export function formatNutritionData(p: Product) {
     sugars: n.sugars_100g ? `${fmt(n.sugars_100g)}g` : "N/A",
     sodium: n.sodium_100g ? `${fmt(n.sodium_100g, 2)}g` : "N/A",
   };
+}
+
+/**
+ * Utilitários de detecção e validação de busca
+ */
+export function detectSearchType(input: string): "barcode" | "name" {
+  const cleaned = input.replace(/\D/g, "");
+  return cleaned.length >= 8 && cleaned.length <= 13 ? "barcode" : "name";
+}
+
+export function isValidBarcode(barcode: string): boolean {
+  const cleaned = barcode.replace(/\D/g, "");
+  return cleaned.length >= 8 && cleaned.length <= 13 && /^\d+$/.test(cleaned);
 }