feat: add donation support with footer card and navigation

Add donation functionality to encourage community support, including a footer card on the home page, a highlighted "Apoiar" link in the header, and comprehensive English messages for the donation section to promote transparency and user engagement.

app/api/donations/verify/route.ts

@@ -0,0 +1,36 @@
+import { NextRequest, NextResponse } from "next/server";
+import { abacatePay } from "@/lib/abacatepay";
+
+export async function GET(request: NextRequest) {
+  try {
+    const { searchParams } = new URL(request.url);
+    const billingId = searchParams.get("billingId");
+
+    if (!billingId) {
+      return NextResponse.json(
+        { success: false, error: "ID da cobrança é obrigatório" },
+        { status: 400 }
+      );
+    }
+
+    const billing = await abacatePay.getBillingStatus(billingId);
+
+    return NextResponse.json({
+      success: true,
+      status: billing.status,
+      amount: billing.amount,
+      createdAt: billing.createdAt,
+      expiresAt: billing.expiresAt,
+    });
+  } catch (error) {
+    console.error("Billing verification error:", error);
+    return NextResponse.json(
+      {
+        success: false,
+        error:
+          error instanceof Error ? error.message : "Erro ao verificar cobrança",
+      },
+      { status: 500 }
+    );
+  }
+}