The previous commit replaced modifiedFiles with getNoteStatus, but main
had tests for the 'changes filter' view that depend on modifiedFiles.
This commit restores full backward compat:
- Both modifiedFiles and getNoteStatus props are accepted
- getNoteStatus takes precedence when provided (used by App.tsx)
- modifiedFiles automatically derives status='modified' when getNoteStatus
is not provided (used by tests and legacy callers)
- isChangesView / 'Changes' header / changes filter all restored
NoteItem continues to use noteStatus prop (new | modified | clean),
so both green (new) and orange (modified) dots work correctly.
048391adcc