style: clean up code formatting and remove trailing whitespace

refactor: reorganize imports and fix type imports

app/api/chats/unread-count/route.ts

@@ -2,7 +2,7 @@
  * GET /api/chats/unread-count
  * Retorna contagem de usuários únicos com mensagens não vistas
  */
-import { NextRequest, NextResponse } from "next/server";
+import { type NextRequest, NextResponse } from "next/server";
 import { requireAuth } from "@/lib/auth/middleware";
 import { connectMongoDB } from "@/lib/mongodb/connection";
 import { Chat } from "@/lib/mongodb/models/Chat";
@@ -54,7 +54,7 @@ export async function GET(request: NextRequest) {
           return total + chat.seller_unread_count;
         }, 0),
       },
-      { status: 200 }
+      { status: 200 },
     );
   } catch (error) {
     secureLogger.error("❌ Erro ao buscar contagem de chats não lidos", {
@@ -64,7 +64,7 @@ export async function GET(request: NextRequest) {
 
     return NextResponse.json(
       { success: false, error: "Erro ao buscar contagem" },
-      { status: 500 }
+      { status: 500 },
     );
   }
 }