async fn require_premium(client: &PasswordManagerClient) -> Result<()>Expand description
Enforce the premium-membership precondition for file Sends by inspecting the premium claim on
the current user’s access-token JWT (option a from PM-39238). Reads the persisted
[AUTHENTICATION_TOKENS] state — the same source the auth middleware attaches to requests — so
no additional token accessor is needed on the client.