Fixes for musicians whose trial has ended.

• Your gigs are yours. See every gig you're invited to, RSVP, and keep your
  profile up to date — no subscription needed.
• Clearer account status. The app no longer shows conflicting messages about
  when your trial ends.
• No more dead ends. Buttons and menus now match what your account can
  actually do, so nothing sends you to a screen you can't use.
• Friendlier errors. If something can't be saved, the app says why in plain
  language instead of showing a technical message — and keeps what you typed.