Add a guided, F-Droid-safe onboarding step and an Advanced Settings recovery
row that let users move LibreMail to "Unrestricted" battery usage, so IMAP
IDLE push (IdleService) and periodic WorkManager sync aren't throttled or
killed by Doze. Deep-links to the system app-details screen rather than the
restricted REQUEST_IGNORE_BATTERY_OPTIMIZATIONS dialog, so it needs no new
permission and is safe on Play (#17) and F-Droid (#16).
- BatteryPromptDecision: pure, unit-tested gate (supported && !unrestricted && !handled)
- BatteryOptimizationManager: reads isIgnoringBatteryOptimizations, builds the deep-link intent
- Onboarding step shown after the first account is added; skipped when already
unrestricted or already handled; re-checks status on resume
- Advanced Settings row shows current status and re-opens the system screen
- battery_prompt_handled flag persisted in the settings DataStore (kept out of AppSettings)
- Unit tests for the decision + view model; Espresso E2E for the step
Closes#49
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
JMR-devandClaude Opus 4.8