Fixed:
- Require confirmation for externally triggered shortcuts (#2)
- Keep screens inside the insets, cap wide windows and align controls
- Clearer host cards, grouping and sort affordances
- Clearer host editor copy, key pickers and discard guards
- Explain what the SSH config import does and pick its credential
- Clearer key import, copy and delete errors
- Rotation-safe editors, profile previews and clearer copy
- Clearer run targets, dialogs and result reporting