feat(market): add Minha Intenções tab with panel, hook, and badge

- Introduced "Minhas Intenções" tab visible only to logged-in users.
- Integrated MyPurchaseIntentionsPanel and useMyPurchaseIntentions hook.
- Added tab badge showing count of pending intentions.
- Extended session API to include user’s main character for downstream features.

lib/hooks/use-purchase-intentions.ts

@@ -0,0 +1,113 @@
+"use client";
+
+import { useQuery, useQueryClient } from "@tanstack/react-query";
+
+export type PurchaseIntentionStatus =
+  | "pending"
+  | "accepted"
+  | "rejected"
+  | "expired"
+  | "completed";
+
+export interface PurchaseIntentionListing {
+  listing_id: number;
+  item_id: number;
+  item_id_unified: number | null;
+  item_name: string;
+  quantity: number;
+  server_name: string;
+  seller_id: number;
+  price_pix: number | null;
+  price_tibia_coins: number | null;
+  price_gold_coins: number | null;
+  listing_status: string;
+  created_at: Date | string;
+  description: string | null;
+  trade_item_id: number | null;
+  trade_item_name: string | null;
+  trade_item_quantity: number | null;
+  views_count: number;
+  favorites_count: number;
+  is_featured: boolean;
+  image_url: string | null;
+  image_local_path: string | null;
+  item_category: string | null;
+  seller_character_name: string | null;
+  seller_username: string | null;
+  seller_email: string | null;
+}
+
+export interface PurchaseIntention {
+  intention_id: number;
+  listing_id: number;
+  buyer_id: number;
+  payment_method: string;
+  payment_method_change_count: number;
+  chat_id: string | null;
+  status: PurchaseIntentionStatus;
+  buyer_message: string | null;
+  seller_response: string | null;
+  created_at: Date | string;
+  updated_at: Date | string;
+  expires_at: Date | string | null;
+  accepted_at: Date | string | null;
+  rejected_at: Date | string | null;
+  listing: PurchaseIntentionListing | null;
+}
+
+interface PurchaseIntentionsResponse {
+  success: boolean;
+  intentions: PurchaseIntention[];
+  count: number;
+}
+
+/**
+ * Hook para buscar intenções de compra do usuário autenticado
+ * Atualiza automaticamente a cada 30 segundos
+ */
+export function useMyPurchaseIntentions(status?: PurchaseIntentionStatus) {
+  const queryParams = new URLSearchParams();
+  if (status) queryParams.set("status", status);
+  queryParams.set("limit", "100"); // Limite alto para mostrar todas
+
+  const { data, isLoading, error, refetch } = useQuery<PurchaseIntentionsResponse>({
+    queryKey: ["my-purchase-intentions", status],
+    queryFn: async () => {
+      const res = await fetch(`/api/purchase-intentions/my?${queryParams.toString()}`);
+      if (!res.ok) {
+        if (res.status === 401) {
+          throw new Error("Não autenticado");
+        }
+        throw new Error("Erro ao buscar intenções de compra");
+      }
+      return res.json();
+    },
+    staleTime: 1000 * 30, // 30 segundos
+    refetchInterval: 1000 * 30, // Refetch a cada 30 segundos
+    refetchOnWindowFocus: true,
+    refetchOnReconnect: true,
+    enabled: true, // Sempre habilitado (autenticação é verificada no backend)
+  });
+
+  return {
+    intentions: data?.intentions || [],
+    count: data?.count || 0,
+    isLoading,
+    error,
+    refetch,
+  };
+}
+
+/**
+ * Hook para invalidar cache de purchase intentions
+ */
+export function useInvalidatePurchaseIntentions() {
+  const queryClient = useQueryClient();
+
+  const invalidate = () => {
+    queryClient.invalidateQueries({ queryKey: ["my-purchase-intentions"] });
+  };
+
+  return invalidate;
+}
+