v3.8.0

• feat: Esc cancels, never quits. Press q to quit.
• feat: Esc on the host list clears your group filter or your bulk selection and stops there. A stray Esc on an empty host list keeps you in the app instead of closing it.
• feat: The first idle Esc per session surfaces a one-shot toast pointing to q, then stays a silent no-op. If a sticky error is up, the hint waits so it never displaces a message you still need to see.
• change: Help footer and wiki spell out q as the only quit key on the host list and tunnels page.
• Esc-as-cancel suggested by @BrahmingWu (#63).