fix(avatar): sincroniza avatar apos atualizar

- Propaga Set-Cookie do Better Auth no endpoint de avatar\n- Forca refresh da sessao apos upload/remocao\n- Adiciona teste de propagacao e defaults de env para testes

tests/setup/bun-test-env.ts

@@ -6,6 +6,7 @@ import { JSDOM } from "jsdom"
 process.env.BETTER_AUTH_SECRET ??= "test-secret"
 process.env.NEXT_PUBLIC_APP_URL ??= "http://localhost:3000"
 process.env.BETTER_AUTH_URL ??= process.env.NEXT_PUBLIC_APP_URL
+process.env.DATABASE_URL ??= "postgresql://postgres:postgres@localhost:5432/sistema_test?schema=public"
 process.env.NODE_ENV ??= "test"
 
 const OriginalDate = Date