UX bug found during smoke testing: clicking Change Instance immediately
deleted the saved instance URL and showed an empty picker, with no way
back if the user changed their mind.
Fix:
- Don't clearInstanceUrl() in recovery action 'change-instance' — picker
is now non-destructive
- Picker pre-fills the input with the current saved URL when present
- Cancel button (shown only when a saved URL exists) returns to current
instance via idempotent setInstanceUrl re-save
- Header copy switches to 'Switch instance' / 'Cancel to stay' framing
when a saved URL is present
- URL only overwrites on explicit Connect to a different instance
Also: add console.log enter/exit lines in enterRecoveryMode and the
clear-recovery-state action handlers, so smoke-test scripts can grep
stderr for recovery activity without UI introspection.
Spec + docs/systems/desktop.md updated.
Jannis Braun
fff39f8d76
