feat: implement market page with QueryProvider and dynamic listings

- wrap root layout with QueryProvider for React Query
- replace market UnderConstruction placeholder with MarketClient and real data fetching
- implement search, pagination, and sort via search params using getActiveListings
- add necessary client components and queries
- update dependencies (e.g., prisma, pkg-types)

app/api/listings/[id]/seller/route.ts

@@ -0,0 +1,57 @@
+import { NextRequest, NextResponse } from "next/server";
+import { secureLogger } from "@/lib/secure-logger";
+import { getListingById } from "@/lib/prisma/queries/listings";
+import { getMainCharacterByUserId } from "@/lib/prisma/queries/characters";
+
+/**
+ * GET /api/listings/[id]/seller
+ * Retorna informações do vendedor (nome do personagem)
+ */
+export async function GET(
+  request: NextRequest,
+  { params }: { params: { id: string } }
+) {
+  try {
+    const listingId = parseInt(params.id, 10);
+    if (isNaN(listingId)) {
+      return NextResponse.json(
+        { success: false, error: "ID de anúncio inválido" },
+        { status: 400 }
+      );
+    }
+
+    const listing = await getListingById(listingId);
+    if (!listing) {
+      return NextResponse.json(
+        { success: false, error: "Anúncio não encontrado" },
+        { status: 404 }
+      );
+    }
+
+    // Buscar personagem principal do vendedor no servidor do listing
+    const character = await getMainCharacterByUserId(listing.seller_id, listing.server_name);
+
+    return NextResponse.json(
+      {
+        success: true,
+        seller: {
+          user_id: listing.seller_id,
+          character_name: character?.character_name || null,
+          server_name: listing.server_name,
+        },
+      },
+      { status: 200 }
+    );
+  } catch (error) {
+    secureLogger.error("❌ Erro ao buscar informações do vendedor", {
+      error: error instanceof Error ? error.message : "Erro desconhecido",
+      stack: error instanceof Error ? error.stack : undefined,
+    });
+
+    return NextResponse.json(
+      { success: false, error: "Erro ao buscar informações do vendedor" },
+      { status: 500 }
+    );
+  }
+}
+