Add JVM unit tests (test-only; no production changes) covering the in-scope
ViewModels + UI state holders and the reporting/push/power/contacts modules
for issue #249.
New ViewModel coverage: Drafts, Outbox, Signatures, SignatureEdit,
AccountSettings, AccountSetup, ManualSetup, ProblemReports, StartupReport,
plus gap-filling for Compose, Mailbox, Reader, Settings, ReportReview and
AppPassword (contacts autocomplete, inline images, send/refresh failure
branches, drawer/search hooks, state-holder value semantics).
New module coverage: AppLog, AppVersionProvider, ReportSubmitter,
ReportUploadWorker (reachable paths), CrashReporter.install, LogEntry,
IntentComposeParser, ContactsRepository, ContactsPermissionManager,
IdlePushManager, BatteryOptimizationManager (Context methods) and
AndroidBatteryStatusProvider.
Android-framework-bound classes with no JVM seam are deliberately left to the
instrumented suite: IdleService (foreground Service), ReportUploadScheduler
(WorkManager.getInstance is not statically mockable), the HTTP transmit path in
ReportUploadWorker (unreachable while BuildConfig.DEBUG_REPORT_ENDPOINT is
empty), and CrashReporter.terminate (calls exitProcess).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>