style: clean up code formatting and remove trailing whitespace

refactor: reorganize imports and fix type imports

app/api/donations/create/route.ts

@@ -1,13 +1,13 @@
-import { NextRequest, NextResponse } from "next/server";
+import { type NextRequest, NextResponse } from "next/server";
 import { abacatePay } from "@/lib/abacatepay";
-import { DONATION_PRODUCTS, DonorData } from "@/types/donation";
-import { createDonationSchema } from "@/lib/validation-schemas";
 import {
   checkRateLimit,
-  getClientIP,
   createRateLimitResponse,
+  getClientIP,
 } from "@/lib/rate-limiter";
 import { secureLogger } from "@/lib/secure-logger";
+import { createDonationSchema } from "@/lib/validation-schemas";
+import { DONATION_PRODUCTS } from "@/types/donation";
 
 export async function POST(request: NextRequest) {
   try {
@@ -49,7 +49,7 @@ export async function POST(request: NextRequest) {
           error: "Dados de entrada inválidos",
           details: errors,
         },
-        { status: 400 }
+        { status: 400 },
       );
     }
 
@@ -72,8 +72,8 @@ export async function POST(request: NextRequest) {
     if (validatedData.tier === "custom") {
       // Converter para centavos
       finalAmount = Math.round(validatedData.customAmount! * 100);
-      finalDescription = `Doação Personalizada - R$ ${validatedData.customAmount!.toFixed(
-        2
+      finalDescription = `Doação Personalizada - R$ ${validatedData.customAmount?.toFixed(
+        2,
       )}`;
 
       secureLogger.info("💰 Valor customizado calculado", {
@@ -161,7 +161,7 @@ export async function POST(request: NextRequest) {
         success: false,
         error: error instanceof Error ? error.message : "Erro interno",
       },
-      { status: 500 }
+      { status: 500 },
     );
   }
 }