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)

lib/db/migrations/015_add_purchase_intentions.sql

@@ -0,0 +1,47 @@
+-- Migration 015: Sistema de Intenções de Compra
+-- Criado em: 2025-01-29
+
+CREATE TABLE IF NOT EXISTS purchase_intentions (
+  intention_id SERIAL PRIMARY KEY,
+  listing_id INTEGER NOT NULL REFERENCES listings(listing_id) ON DELETE CASCADE,
+  buyer_id INTEGER NOT NULL REFERENCES users(user_id) ON DELETE CASCADE,
+  payment_method VARCHAR(20) NOT NULL CHECK (payment_method IN ('pix', 'tibia_coins', 'gold_coins', 'trade')),
+  status VARCHAR(20) DEFAULT 'pending' CHECK (status IN ('pending', 'accepted', 'rejected', 'expired', 'completed')),
+  buyer_message TEXT,
+  seller_response TEXT,
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  expires_at TIMESTAMP,
+  accepted_at TIMESTAMP,
+  rejected_at TIMESTAMP
+);
+
+-- Índices para performance
+CREATE INDEX IF NOT EXISTS idx_purchase_intentions_listing_id ON purchase_intentions(listing_id);
+CREATE INDEX IF NOT EXISTS idx_purchase_intentions_buyer_id ON purchase_intentions(buyer_id);
+CREATE INDEX IF NOT EXISTS idx_purchase_intentions_status ON purchase_intentions(status);
+CREATE INDEX IF NOT EXISTS idx_purchase_intentions_created_at ON purchase_intentions(created_at DESC);
+
+-- Constraint: apenas uma intenção pendente por listing+buyer
+CREATE UNIQUE INDEX IF NOT EXISTS idx_purchase_intentions_unique_pending 
+ON purchase_intentions(listing_id, buyer_id) 
+WHERE status = 'pending';
+
+-- Trigger para atualizar updated_at
+CREATE OR REPLACE FUNCTION update_purchase_intentions_updated_at()
+RETURNS TRIGGER AS $$
+BEGIN
+  NEW.updated_at = CURRENT_TIMESTAMP;
+  RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE TRIGGER trigger_update_purchase_intentions_updated_at
+  BEFORE UPDATE ON purchase_intentions
+  FOR EACH ROW
+  EXECUTE FUNCTION update_purchase_intentions_updated_at();
+
+-- Comentários para documentação
+COMMENT ON TABLE purchase_intentions IS 'Intenções de compra de anúncios - permite múltiplos compradores interessados';
+COMMENT ON COLUMN purchase_intentions.status IS 'pending: aguardando resposta do vendedor, accepted: aceita, rejected: rejeitada, expired: expirada, completed: concluída';
+