sync_settings_widget.dart 68 — the public StatefulWidget and its callbacks
sync_settings_sections.dart 132 — the two sections the screen composes
sync_settings_screen.dart 192 — the State: loading, connecting, build
Uses `part`/`part of`, not imports: _FirebaseSection and _BackupSection are
library-private, so a sibling file cannot import them at all — extracting them
as ordinary files would not compile.
Two shapes tried and rejected on the way: an `extension _BackupActions` on the
State (an extension cannot call the protected setState), and moving build()
out of the class (it is an @override and has to stay). Both reverted from HEAD
rather than patched around.
flutter analyze clean, 29 tests pass.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CFSGeWxHPY5rHUGrPqhcmG
