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/bids.ts

@@ -26,7 +26,7 @@ export interface CreateBidData {
  * Cria um novo lance
  */
 export async function createBid(data: CreateBidData): Promise<Bid> {
-  return await prisma.bid.create({
+  const bid = await prisma.bid.create({
     data: {
       listing_id: data.listing_id,
       bidder_id: data.bidder_id,
@@ -34,6 +34,11 @@ export async function createBid(data: CreateBidData): Promise<Bid> {
       bid_type: data.bid_type || null,
     },
   });
+  return {
+    ...bid,
+    bid_amount: Number(bid.bid_amount),
+    bid_type: (bid.bid_type as "pix" | "tibia_coins" | "gold_coins" | null),
+  };
 }
 
 /**
@@ -43,7 +48,7 @@ export async function getBidsByListing(
   listingId: number,
   activeOnly: boolean = true
 ): Promise<Bid[]> {
-  return await prisma.bid.findMany({
+  const bids = await prisma.bid.findMany({
     where: {
       listing_id: listingId,
       ...(activeOnly ? { is_active: true } : {}),
@@ -53,13 +58,18 @@ export async function getBidsByListing(
       { created_at: "desc" },
     ],
   });
+  return bids.map(bid => ({
+    ...bid,
+    bid_amount: Number(bid.bid_amount),
+    bid_type: (bid.bid_type as "pix" | "tibia_coins" | "gold_coins" | null),
+  }));
 }
 
 /**
  * Busca o maior lance de um anúncio
  */
 export async function getHighestBid(listingId: number): Promise<Bid | null> {
-  return await prisma.bid.findFirst({
+  const bid = await prisma.bid.findFirst({
     where: {
       listing_id: listingId,
       is_active: true,
@@ -69,6 +79,12 @@ export async function getHighestBid(listingId: number): Promise<Bid | null> {
       { created_at: "desc" },
     ],
   });
+  if (!bid) return null;
+  return {
+    ...bid,
+    bid_amount: Number(bid.bid_amount),
+    bid_type: (bid.bid_type as "pix" | "tibia_coins" | "gold_coins" | null),
+  };
 }
 
 /**
@@ -87,8 +103,14 @@ export async function cancelBid(bidId: number): Promise<boolean> {
  * Busca lance por ID
  */
 export async function getBidById(bidId: number): Promise<Bid | null> {
-  return await prisma.bid.findUnique({
+  const bid = await prisma.bid.findUnique({
     where: { bid_id: bidId },
   });
+  if (!bid) return null;
+  return {
+    ...bid,
+    bid_amount: Number(bid.bid_amount),
+    bid_type: (bid.bid_type as "pix" | "tibia_coins" | "gold_coins" | null),
+  };
 }