M12f: S-16 lost version read-only, S-22 versions from /health, settle start without a partner (D-109 to D-111)

- Rejection.lost: RejectedVersion (the pushed entity from sync_rejections.rejected_payload as a ledger row, account,
  payer, split, notes, deleted); S-16 "Öppna" shows it read-only in a dialog with "Visa nuvarande version" (S-8/S-10);
  without one it opens the current version as before. Ledger rows take a null onClick (read-only).
- AboutState.schemaVersion; AboutRepositoryImpl calls E-1 /health once per collection when online; header fallback.
  S-22 shows "1.1.0 (schema 3)".
- SettlementRepository.start/recompute return null without a session or partner; save is Invalid(payer); no
  checkNotNull/requireNotNull in :data.
- :feature:home screenshot harness: one more frame and an idle looper before each capture; the committed sv_dark,
  200 % and dialog goldens were one variant stale (light instead of dark, en instead of sv_200).
- Tests: lost version (stale, refused deletion, unreadable payload), /health online and offline, settle without a
  partner, category reorder PATCHes, recurring toWire splits, §9.2 effect cases.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TQd3pEP9UeN2uifbHknQ7B

android/feature/home/src/test/kotlin/se/hagstedt/kvitt/feature/home/HomeScreenshotTest.kt

@@ -23,10 +23,12 @@ fun homeState(scenario: FakeScenario, act: (HomeViewModel) -> Unit = {}): HomeUi
     vm.ui.value
 }
 
-/** Sync status with [scenario]. */
-fun syncState(scenario: FakeScenario): SyncStatusUi = withMain {
+/** Sync status with [scenario] after [act] on its ViewModel. */
+fun syncState(scenario: FakeScenario, act: (SyncStatusViewModel) -> Unit = {}): SyncStatusUi = withMain {
     val fakes = FakeRepositories(scenario)
-    SyncStatusViewModel(fakes.sync, fakes.connectivity, fakes.session).ui.value
+    val vm = SyncStatusViewModel(fakes.sync, fakes.connectivity, fakes.session)
+    act(vm)
+    vm.ui.value
 }
 
 /** Every state of S-4, S-16 and S-17 (design-spec §4 and PLAN-M7b §5) × light/dark × sv/en. */
@@ -56,6 +58,9 @@ val homeStates: List<ScreenState> = listOf(
     sync("S-16-sync-error", HomeScenarios.pending.copy(lastAttemptFailed = true)),
     sync("S-16-sync-offline", HomeScenarios.syncOffline),
     sync("S-16-sync-long", HomeScenarios.longSync, largeFont = true),
+    sync("S-16-sync-lost", HomeScenarios.syncLoaded, largeFont = true) { it.openRejection("m-1") },
+    sync("S-16-sync-lost-payment", HomeScenarios.allRejections) { it.openRejection("m-3") },
+    sync("S-16-sync-lost-deleted", HomeScenarios.allRejections) { it.openRejection("m-5") },
 )
 
 private fun home(name: String, scenario: FakeScenario, largeFont: Boolean = false, act: (HomeViewModel) -> Unit = {}): ScreenState {
@@ -63,8 +68,8 @@ private fun home(name: String, scenario: FakeScenario, largeFont: Boolean = fals
     return ScreenState(name, largeFont) { HomeContent(ui, HomeActions()) }
 }
 
-private fun sync(name: String, scenario: FakeScenario, largeFont: Boolean = false): ScreenState {
-    val ui = syncState(scenario)
+private fun sync(name: String, scenario: FakeScenario, largeFont: Boolean = false, act: (SyncStatusViewModel) -> Unit = {}): ScreenState {
+    val ui = syncState(scenario, act)
     return ScreenState(name, largeFont) { SyncStatusContent(ui, SyncStatusActions()) }
 }
 
@@ -93,7 +98,7 @@ class HomeScreenshotTest(private val state: String) {
             "S-4-home-syncing", "S-4-home-empty", "S-4-home-loading", "S-4-home-offline", "S-4-home-only-archived", "S-4-home-long",
             "S-17-update-banner", "S-17-update-permission", "S-17-update", "S-17-update-progress", "S-17-update-failed",
             "S-16-sync", "S-16-sync-empty", "S-16-sync-rejections", "S-16-sync-clock", "S-16-sync-running", "S-16-sync-error",
-            "S-16-sync-offline", "S-16-sync-long",
+            "S-16-sync-offline", "S-16-sync-long", "S-16-sync-lost", "S-16-sync-lost-payment", "S-16-sync-lost-deleted",
         ).map { arrayOf<Any>(it) }
     }
 }

android/feature/home/src/test/kotlin/se/hagstedt/kvitt/feature/home/HomeViewModelTest.kt

@@ -163,4 +163,19 @@ class SyncStatusViewModelTest {
         withMain { vm.dismiss(HomeScenarios.staleRejection.mutationId) }
         assertTrue((vm.ui.value as SyncStatusUi.Ready).status.rejections.isEmpty())
     }
+
+    @Test
+    fun openingARejectionShowsItsLostVersion_andCloseOrDismissHidesIt() {
+        val fakes = FakeRepositories(HomeScenarios.syncLoaded)
+        val vm = withMain { SyncStatusViewModel(fakes.sync, fakes.connectivity, fakes.session) }
+        assertEquals(null, (vm.ui.value as SyncStatusUi.Ready).opened)
+        withMain { vm.openRejection(HomeScenarios.staleRejection.mutationId) }
+        val opened = (vm.ui.value as SyncStatusUi.Ready).opened
+        assertEquals(HomeScenarios.lostBabette, opened?.lost)
+        withMain { vm.closeRejection() }
+        assertEquals(null, (vm.ui.value as SyncStatusUi.Ready).opened)
+        withMain { vm.openRejection(HomeScenarios.staleRejection.mutationId) }
+        withMain { vm.dismiss(HomeScenarios.staleRejection.mutationId) }
+        assertEquals(null, (vm.ui.value as SyncStatusUi.Ready).opened)
+    }
 }

android/feature/home/src/test/kotlin/se/hagstedt/kvitt/feature/home/ScreenSnapshots.kt

@@ -2,6 +2,7 @@ package se.hagstedt.kvitt.feature.home
 
 import android.content.res.Configuration
 import android.os.LocaleList
+import android.os.Looper
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.getValue
@@ -22,6 +23,7 @@ import kotlinx.coroutines.test.UnconfinedTestDispatcher
 import kotlinx.coroutines.test.resetMain
 import kotlinx.coroutines.test.setMain
 import kotlinx.datetime.TimeZone
+import org.robolectric.Shadows.shadowOf
 import se.hagstedt.kvitt.design.KvittTheme
 import se.hagstedt.kvitt.design.component.KvittClock
 import se.hagstedt.kvitt.design.component.LocalKvittClock
@@ -75,6 +77,11 @@ object ScreenSnapshots {
         variants.forEach { variant ->
             current = variant
             compose.mainClock.advanceTimeBy(SETTLE_MILLIS)
+            // The screen (and a dialog window: S-16's lost version, S-17's install dialog) draw in a later frame; one
+            // more frame and an idle main looper, so the capture shows this variant and not the previous one.
+            shadowOf(Looper.getMainLooper()).idle()
+            compose.mainClock.advanceTimeByFrame()
+            shadowOf(Looper.getMainLooper()).idle()
             captureScreenRoboImage("src/test/screenshots/${name}_${variant.suffix}.png")
         }
     }