feat(api): implement product caching mechanism

- Add NODE_ENV=production to .env for environment configuration
- Enhance product API route with JSON cache manager for local storage and retrieval
- Introduce cache-only mode and detailed logging for better performance and offline support
- Update UI to display cache status and storage statistics

app/api/cache/sync/route.ts

@@ -0,0 +1,32 @@
+import { NextRequest, NextResponse } from "next/server";
+import { jsonCacheManager } from "@/lib/jsonCacheManager";
+
+export async function POST(request: NextRequest) {
+  try {
+    const { products } = await request.json();
+
+    if (!products || !Array.isArray(products)) {
+      return NextResponse.json(
+        { error: "Produtos inválidos" },
+        { status: 400 }
+      );
+    }
+
+    // Salvar produtos no cache
+    const result = await jsonCacheManager.saveProducts(products);
+
+    console.log(`[Cache Sync] ${result.saved} novos produtos salvos`);
+
+    return NextResponse.json({
+      success: true,
+      saved: result.saved,
+      failed: result.failed,
+    });
+  } catch (error) {
+    console.error("Erro ao sincronizar cache:", error);
+    return NextResponse.json(
+      { error: "Erro ao sincronizar cache" },
+      { status: 500 }
+    );
+  }
+}