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

vitest.config.mts

@@ -10,6 +10,9 @@ const convexDir = path.resolve(__dirname, "./convex")
 const isCI = process.env.CI === "true"
 const isBrowserRun = process.env.VITEST_BROWSER === "true"
 
+process.env.DATABASE_URL =
+  process.env.DATABASE_URL ?? "postgresql://postgres:postgres@localhost:5432/sistema_test?schema=public"
+
 export default defineConfig({
   root: __dirname,
   plugins: [tsconfigPaths()],