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/auth/jwt.ts

@@ -36,7 +36,7 @@ function getJWTRefreshSecret(): string {
 }
 
 // Tempos de expiração
-const ACCESS_TOKEN_EXPIRY = "15m"; // 15 minutos
+const ACCESS_TOKEN_EXPIRY = "1h"; // 1 hora
 const REFRESH_TOKEN_EXPIRY = "7d"; // 7 dias
 
 /**