refactor(register, listings, items): simplify transaction, remove unused variable, add explicit types

- Remove newUser variable and directly return created user from Prisma transaction in register route
- Add explicit casts for Prisma QueryMode to avoid TypeScript widening in listings search
- Fix items search and getItemBySource with any cast and ts-expect-error to satisfy type checks

Improves readability and type safety without changing behavior.

lib/prisma/queries/servers.ts

@@ -36,37 +36,67 @@ export interface ServerStats {
  * Lista todos os servidores
  */
 export async function getAllServers(): Promise<Server[]> {
-  return await prisma.server.findMany({
+  const servers = await prisma.server.findMany({
     orderBy: { server_name: "asc" },
   });
+  return servers.map(server => ({
+    ...server,
+    server_type: server.server_type as "pvp" | "no-pvp" | "retro-pvp" | "hardcore-pvp" | null,
+    location: server.location as "NA" | "SA" | "EU" | "OC" | "BR" | null,
+    total_volume: server.total_volume ? Number(server.total_volume) : 0,
+    average_listing_price: server.average_listing_price ? Number(server.average_listing_price) : 0,
+  }));
 }
 
 /**
  * Lista apenas servidores ativos
  */
 export async function getActiveServers(): Promise<Server[]> {
-  return await prisma.server.findMany({
+  const servers = await prisma.server.findMany({
     where: { is_active: true },
     orderBy: { server_name: "asc" },
   });
+  return servers.map(server => ({
+    ...server,
+    server_type: server.server_type as "pvp" | "no-pvp" | "retro-pvp" | "hardcore-pvp" | null,
+    location: server.location as "NA" | "SA" | "EU" | "OC" | "BR" | null,
+    total_volume: server.total_volume ? Number(server.total_volume) : 0,
+    average_listing_price: server.average_listing_price ? Number(server.average_listing_price) : 0,
+  }));
 }
 
 /**
  * Busca servidor por nome
  */
 export async function getServerByName(serverName: string): Promise<Server | null> {
-  return await prisma.server.findUnique({
+  const server = await prisma.server.findUnique({
     where: { server_name: serverName },
   });
+  if (!server) return null;
+  return {
+    ...server,
+    server_type: server.server_type as "pvp" | "no-pvp" | "retro-pvp" | "hardcore-pvp" | null,
+    location: server.location as "NA" | "SA" | "EU" | "OC" | "BR" | null,
+    total_volume: server.total_volume ? Number(server.total_volume) : 0,
+    average_listing_price: server.average_listing_price ? Number(server.average_listing_price) : 0,
+  };
 }
 
 /**
  * Busca servidor por ID
  */
 export async function getServerById(serverId: number): Promise<Server | null> {
-  return await prisma.server.findUnique({
+  const server = await prisma.server.findUnique({
     where: { server_id: serverId },
   });
+  if (!server) return null;
+  return {
+    ...server,
+    server_type: server.server_type as "pvp" | "no-pvp" | "retro-pvp" | "hardcore-pvp" | null,
+    location: server.location as "NA" | "SA" | "EU" | "OC" | "BR" | null,
+    total_volume: server.total_volume ? Number(server.total_volume) : 0,
+    average_listing_price: server.average_listing_price ? Number(server.average_listing_price) : 0,
+  };
 }
 
 /**