fix: keep session when refresh fails on network error or 5xx (WealthLedger/frontend#97)

src/features/auth/model/auth-context.ts

@@ -7,7 +7,12 @@ type AuthContextValue = {
 	logout: () => Promise<void>;
 	ready: boolean;
 	register: (email: string, password: string) => Promise<void>;
+	retry: () => void;
 	signedOut: boolean;
+	/**
+	Refresh failed with a network error or 5xx; the refresh cookie may still be valid.
+	*/
+	unavailable: boolean;
 	user: undefined | User;
 };