TASK-076: version 0.2.5, published as the release build

The release build type is signed with the key the published builds have had,
so it installs over them.

Agent: main (opus)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/build.gradle.kts

@@ -16,14 +16,17 @@ android {
         targetSdk = 36
         // Raised for every build published to the download page (TASK-066), or the app will not
         // see it as newer.
-        versionCode = 6
-        versionName = "0.2.4"
+        versionCode = 7
+        versionName = "0.2.5"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
 
     buildTypes {
         release {
+            // The published build (TASK-076). It carries this PC's debug key, as every build
+            // published before it did, so it installs over them as an update.
+            signingConfig = signingConfigs.getByName("debug")
             isMinifyEnabled = false
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),

app/src/main/java/com/ubisam/ubgitea/MainActivity.kt

@@ -17,14 +17,6 @@ import androidx.activity.enableEdgeToEdge
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.activity.viewModels
 import androidx.browser.customtabs.CustomTabsIntent
-import androidx.compose.animation.AnimatedContent
-import androidx.compose.animation.core.FastOutSlowInEasing
-import androidx.compose.animation.core.tween
-import androidx.compose.animation.fadeIn
-import androidx.compose.animation.fadeOut
-import androidx.compose.animation.slideInHorizontally
-import androidx.compose.animation.slideOutHorizontally
-import androidx.compose.animation.togetherWith
 import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
@@ -48,7 +40,6 @@ import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.unit.IntOffset
 import androidx.compose.ui.unit.dp
 import com.ubisam.ubgitea.core.auth.protocol.UBGiteaOAuthDefaults
 import com.ubisam.ubgitea.core.notifications.FavoritePushNotifier
@@ -94,7 +85,11 @@ import com.ubisam.ubgitea.feature.work.WorkViewModel
 import com.ubisam.ubgitea.feature.workitems.WorkItemsScreen
 import com.ubisam.ubgitea.feature.workitems.WorkItemsTarget
 import com.ubisam.ubgitea.feature.workitems.WorkItemsViewModel
+import com.ubisam.ubgitea.ui.components.ExitConfirmDialog
+import com.ubisam.ubgitea.ui.components.PushedOver
+import com.ubisam.ubgitea.ui.components.heldWhilePushedIn
 import com.ubisam.ubgitea.ui.components.SplashOverlay
+import com.ubisam.ubgitea.ui.components.TabPager
 import com.ubisam.ubgitea.ui.navigation.Route
 import com.ubisam.ubgitea.ui.navigation.RouteStackSaver
 import com.ubisam.ubgitea.ui.shell.AppShell
@@ -268,19 +263,28 @@ class MainActivity : ComponentActivity() {
                 homeViewModel.close()
                 workViewModel.close()
             }
-            fun signOut() {
-                closeFeatures()
-                selectTab(AppTab.HOME)
-                viewModel.logout()
+            // Held, not made again on each pass: the screens are given these, and a screen given
+            // the same callbacks as before is left alone when something else here changes.
+            val signOut: () -> Unit = remember {
+                {
+                    closeFeatures()
+                    selectTab(AppTab.HOME)
+                    viewModel.logout()
+                }
             }
-            fun leaveBranchDetail() {
-                codeBrowserViewModel.close()
-                historyViewModel.close()
-                pop()
+            val leaveBranchDetail: () -> Unit = remember {
+                {
+                    codeBrowserViewModel.close()
+                    historyViewModel.close()
+                    pop()
+                }
             }
 
+            var confirmExit by remember { mutableStateOf(false) }
             val instanceHost = UBGiteaOAuthDefaults.config.baseUri.host.orEmpty()
-            val codeViewerPreferences = CodeViewerPreferences(settingsState.codeWordWrapEnabled, settingsState.codeFontSizeSp)
+            val codeViewerPreferences = remember(settingsState.codeWordWrapEnabled, settingsState.codeFontSizeSp) {
+                CodeViewerPreferences(settingsState.codeWordWrapEnabled, settingsState.codeFontSizeSp)
+            }
             val showNavigation = sessionReady && when (currentRoute) {
                 is Route.BranchDetail -> !isReadingFullScreen(codeBrowserState, historyState)
                 Route.Settings, Route.Compare -> false
@@ -317,23 +321,28 @@ class MainActivity : ComponentActivity() {
                     SavedCodeTab(route.owner, route.name, it.target.kind.name, it.target.ref.value, it.path.value)
                 }
             }
-            val workbench = if (sessionReady) {
-                CodeWorkbench(
-                    tabs = workbenchState.tabs,
-                    pending = workbenchState.pending,
-                    fetching = workbenchState.fetching,
-                    onToggleTab = workbenchViewModel::toggleTab,
-                    onPin = workbenchViewModel::pin,
-                    onCompareWith = workbenchViewModel::compareWith,
-                    onClearPin = workbenchViewModel::clearPin,
-                    onUseCommitFile = { commitId, shortId, path, side ->
-                        (currentRoute as? Route.BranchDetail)?.let { route ->
-                            workbenchViewModel.useCommitFile(RepositoryCoordinates.of(route.owner, route.name), commitId, shortId, path, side)
-                        }
-                    },
-                )
-            } else {
-                null
+            // Made again only when what it holds changes. Every screen is composed under it, and
+            // a new one, even one that says the same, has every screen on every tab drawn again:
+            // that was a stall of several frames at the start of each tab change and each push.
+            val workbench = remember(sessionReady, workbenchState.tabs, workbenchState.pending, workbenchState.fetching) {
+                if (sessionReady) {
+                    CodeWorkbench(
+                        tabs = workbenchState.tabs,
+                        pending = workbenchState.pending,
+                        fetching = workbenchState.fetching,
+                        onToggleTab = workbenchViewModel::toggleTab,
+                        onPin = workbenchViewModel::pin,
+                        onCompareWith = workbenchViewModel::compareWith,
+                        onClearPin = workbenchViewModel::clearPin,
+                        onUseCommitFile = { commitId, shortId, path, side ->
+                            (routeStack.last() as? Route.BranchDetail)?.let { route ->
+                                workbenchViewModel.useCommitFile(RepositoryCoordinates.of(route.owner, route.name), commitId, shortId, path, side)
+                            }
+                        },
+                    )
+                } else {
+                    null
+                }
             }
             val showStrip = sessionReady && currentRoute != Route.Settings && currentRoute != Route.Compare &&
                 (workbenchState.tabs.isNotEmpty() || workbenchState.pending != null || workbenchState.fetching)
@@ -396,19 +405,23 @@ class MainActivity : ComponentActivity() {
                         null
                     },
                 ) { isWide ->
-                    // Back on any tab but Home goes Home; back on Home leaves the app.
-                    BackHandler(enabled = sessionReady && currentRoute.isTab && currentRoute != Route.Home) {
-                        selectTab(AppTab.HOME)
+                    // Back on any tab but Home goes Home; back on Home asks before leaving the
+                    // app, since it is easily pressed once too often.
+                    BackHandler(enabled = sessionReady && currentRoute.isTab) {
+                        if (currentRoute == Route.Home) confirmExit = true else selectTab(AppTab.HOME)
                     }
-                    val repositoryList: @Composable () -> Unit = {
+                    // The screens are built once and held, and read what changes from state. A
+                    // tab press, which runs everything around them again, then leaves the four tab
+                    // screens exactly as they were instead of drawing each of them again.
+                    val repositoryList: @Composable () -> Unit = remember { {
                         RepositoryListScreen(
                             state = state,
                             instanceHost = instanceHost,
-                            onSignIn = viewModel::signIn,
-                            onCancelSignIn = viewModel::cancelSignIn,
-                            onRetry = viewModel::retry,
-                            onLogout = ::signOut,
-                            onRepositorySelected = viewModel::selectRepository,
+                            onSignIn = remember { viewModel::signIn },
+                            onCancelSignIn = remember { viewModel::cancelSignIn },
+                            onRetry = remember { viewModel::retry },
+                            onLogout = signOut,
+                            onRepositorySelected = remember { viewModel::selectRepository },
                             onReferenceSelected = { repository, name, kind ->
                                 viewModel.selectReference(name, kind)
                                 val refKind = if (kind == ReferenceKind.BRANCH) CodeReferenceKind.BRANCH else CodeReferenceKind.TAG
@@ -421,51 +434,34 @@ class MainActivity : ComponentActivity() {
                                     ),
                                 )
                             },
-                            onReferencesRefresh = viewModel::refreshReferences,
-                            onBackToRepositories = viewModel::backToRepositories,
-                            onNextPage = viewModel::nextPage,
-                            onPreviousPage = viewModel::previousPage,
-                            onRefreshRepositories = viewModel::refreshRepositories,
-                            onRetryLastPushedBranch = viewModel::retryRowLastPushedBranch,
-                            onToggleFavorite = viewModel::toggleFavorite,
-                            onShowAllRepositories = viewModel::showAllRepositories,
-                            onShowFavorites = viewModel::showFavorites,
+                            onReferencesRefresh = remember { viewModel::refreshReferences },
+                            onBackToRepositories = remember { viewModel::backToRepositories },
+                            onNextPage = remember { viewModel::nextPage },
+                            onPreviousPage = remember { viewModel::previousPage },
+                            onRefreshRepositories = remember { viewModel::refreshRepositories },
+                            onRetryLastPushedBranch = remember { viewModel::retryRowLastPushedBranch },
+                            onToggleFavorite = remember { viewModel::toggleFavorite },
+                            onShowAllRepositories = remember { viewModel::showAllRepositories },
+                            onShowFavorites = remember { viewModel::showFavorites },
                             onViewWorkItems = { repository ->
                                 push(Route.WorkItems(repository.coordinates.owner, repository.coordinates.name))
                             },
-                            onSelectOrganization = viewModel::selectOrganization,
+                            onSelectOrganization = remember { viewModel::selectOrganization },
                             onViewSettings = { push(Route.Settings) },
                         )
-                    }
-                    // Entering a screen slides it in from the side it was opened towards, and a
-                    // tab switch from the side that tab sits on in the bar. Keyed by the kind of
-                    // screen, so moving between code tabs or pages of one screen does not replay it.
+                    } }
+                    // Opening a screen pushes it in from the right as the one behind leaves to the
+                    // left, and going back reverses that; it loads while it arrives. Keyed by
+                    // the kind of screen, so moving between code tabs or pages of one screen does
+                    // not replay it. The four tabs are one kind: between them the pager below glides.
                     val stackDepth = routeStack.size
                     val shownDepth = remember { intArrayOf(stackDepth) }
-                    SideEffect { shownDepth[0] = stackDepth }
-                    AnimatedContent(
-                        targetState = currentRoute.takeIf { sessionReady } ?: Route.Repositories,
-                        modifier = Modifier.fillMaxSize(),
-                        transitionSpec = {
-                            val fromTab = initialState.tab
-                            val toTab = targetState.tab
-                            val tabSwitch = stackDepth == shownDepth[0] && fromTab != null && toTab != null
-                            if (tabSwitch) {
-                                // Tabs sit side by side: the old one glides out as the new one
-                                // glides in, the whole width, like turning to the next page.
-                                val direction = (toTab.ordinal - fromTab.ordinal).coerceIn(-1, 1)
-                                val glide = tween<IntOffset>(320, easing = FastOutSlowInEasing)
-                                slideInHorizontally(glide) { it * direction }
-                                    .togetherWith(slideOutHorizontally(glide) { -it * direction })
-                            } else {
-                                val direction = (stackDepth - shownDepth[0]).coerceIn(-1, 1)
-                                (fadeIn(tween(200, delayMillis = 50)) + slideInHorizontally(tween(260)) { it / 10 * direction })
-                                    .togetherWith(fadeOut(tween(90)))
-                            }
-                        },
-                        contentKey = { it::class },
-                        label = "route",
-                    ) { route ->
+                    val shownReady = remember { booleanArrayOf(sessionReady) }
+                    SideEffect {
+                        shownDepth[0] = stackDepth
+                        shownReady[0] = sessionReady
+                    }
+                    val screen: @Composable (Route) -> Unit = remember(isWide, codeViewerPreferences) { { route ->
                     Box(Modifier.fillMaxSize()) {
                     when (route) {
                         Route.Home -> HomeScreen(
@@ -493,52 +489,52 @@ class MainActivity : ComponentActivity() {
                                     )
                                 }
                             },
-                            onSelectSource = homeViewModel::selectSource,
-                            onSelectFilter = homeViewModel::selectFilter,
-                            onSetTodayOnly = homeViewModel::setTodayOnly,
-                            onShowToday = homeViewModel::showToday,
-                            onLoadMore = homeViewModel::loadMore,
-                            onRefresh = homeViewModel::refresh,
+                            onSelectSource = remember { homeViewModel::selectSource },
+                            onSelectFilter = remember { homeViewModel::selectFilter },
+                            onSetTodayOnly = remember { homeViewModel::setTodayOnly },
+                            onShowToday = remember { homeViewModel::showToday },
+                            onLoadMore = remember { homeViewModel::loadMore },
+                            onRefresh = remember { homeViewModel::refresh },
                             onViewSettings = { push(Route.Settings) },
-                            onLogout = ::signOut,
-                            onAuthenticationExpired = ::signOut,
+                            onLogout = signOut,
+                            onAuthenticationExpired = signOut,
                         )
                         Route.Work -> WorkScreen(
                             state = workState,
                             accountName = accountName,
                             instanceHost = instanceHost,
-                            onSelectScope = workViewModel::selectScope,
-                            onSelectState = workViewModel::selectState,
-                            onSelectType = workViewModel::selectType,
+                            onSelectScope = remember { workViewModel::selectScope },
+                            onSelectState = remember { workViewModel::selectState },
+                            onSelectType = remember { workViewModel::selectType },
                             onItemSelected = { hit ->
                                 push(Route.WorkItems(hit.repository.owner, hit.repository.name, hit.number, hit.isPullRequest))
                             },
-                            onNextPage = workViewModel::nextPage,
-                            onPreviousPage = workViewModel::previousPage,
-                            onRefresh = workViewModel::refresh,
+                            onNextPage = remember { workViewModel::nextPage },
+                            onPreviousPage = remember { workViewModel::previousPage },
+                            onRefresh = remember { workViewModel::refresh },
                             onViewSettings = { push(Route.Settings) },
-                            onLogout = ::signOut,
-                            onAuthenticationExpired = ::signOut,
+                            onLogout = signOut,
+                            onAuthenticationExpired = signOut,
                         )
                         Route.Settings -> SettingsScreen(
                             state = settingsState,
-                            onSetReactiveAuthRetryEnabled = settingsViewModel::setReactiveAuthRetryEnabled,
-                            onSetFavoritePushNotificationsEnabled = settingsViewModel::setFavoritePushNotificationsEnabled,
+                            onSetReactiveAuthRetryEnabled = remember { settingsViewModel::setReactiveAuthRetryEnabled },
+                            onSetFavoritePushNotificationsEnabled = remember { settingsViewModel::setFavoritePushNotificationsEnabled },
                             accountName = accountName,
                             instanceHost = instanceHost,
-                            onSetCodeWordWrapEnabled = settingsViewModel::setCodeWordWrapEnabled,
-                            onSetCodeFontSizeSp = settingsViewModel::setCodeFontSizeSp,
-                            onSetThemeMode = settingsViewModel::setThemeMode,
-                            onLogout = ::signOut,
+                            onSetCodeWordWrapEnabled = remember { settingsViewModel::setCodeWordWrapEnabled },
+                            onSetCodeFontSizeSp = remember { settingsViewModel::setCodeFontSizeSp },
+                            onSetThemeMode = remember { settingsViewModel::setThemeMode },
+                            onLogout = signOut,
                             onBack = { pop() },
                             update = updateState,
-                            onCheckUpdate = updateViewModel::checkNow,
-                            onInstallUpdate = ::startUpdate,
+                            onCheckUpdate = remember { updateViewModel::checkNow },
+                            onInstallUpdate = remember { ::startUpdate },
                         )
                         Route.Notifications -> NotificationsScreen(
                             state = notificationsState,
-                            onShowUnreadOnly = notificationsViewModel::showUnreadOnly,
-                            onShowAll = notificationsViewModel::showAll,
+                            onShowUnreadOnly = remember { notificationsViewModel::showUnreadOnly },
+                            onShowAll = remember { notificationsViewModel::showAll },
                             onNotificationSelected = { notification ->
                                 push(
                                     Route.WorkItems(
@@ -549,15 +545,15 @@ class MainActivity : ComponentActivity() {
                                     ),
                                 )
                             },
-                            onNextPage = notificationsViewModel::nextPage,
-                            onPreviousPage = notificationsViewModel::previousPage,
-                            onRetry = notificationsViewModel::retry,
+                            onNextPage = remember { notificationsViewModel::nextPage },
+                            onPreviousPage = remember { notificationsViewModel::previousPage },
+                            onRetry = remember { notificationsViewModel::retry },
                             onBack = { selectTab(AppTab.HOME) },
-                            onAuthenticationExpired = ::signOut,
+                            onAuthenticationExpired = signOut,
                             accountName = accountName,
                             instanceHost = instanceHost,
                             onViewSettings = { push(Route.Settings) },
-                            onLogout = ::signOut,
+                            onLogout = signOut,
                         )
                         is Route.WorkItems -> {
                             val leave = {
@@ -566,65 +562,78 @@ class MainActivity : ComponentActivity() {
                             }
                             WorkItemsScreen(
                                 state = workItemsState,
-                                onShowIssues = workItemsViewModel::showIssues,
-                                onShowPullRequests = workItemsViewModel::showPullRequests,
-                                onIssueSelected = workItemsViewModel::openIssue,
-                                onPullRequestSelected = workItemsViewModel::openPullRequest,
-                                onNextPage = workItemsViewModel::nextPage,
-                                onPreviousPage = workItemsViewModel::previousPage,
-                                onGoToPage = workItemsViewModel::goToPage,
-                                onRetryList = workItemsViewModel::retryList,
-                                onRetryDetail = workItemsViewModel::retryDetail,
+                                onShowIssues = remember { workItemsViewModel::showIssues },
+                                onShowPullRequests = remember { workItemsViewModel::showPullRequests },
+                                onIssueSelected = remember { workItemsViewModel::openIssue },
+                                onPullRequestSelected = remember { workItemsViewModel::openPullRequest },
+                                onNextPage = remember { workItemsViewModel::nextPage },
+                                onPreviousPage = remember { workItemsViewModel::previousPage },
+                                onGoToPage = remember { workItemsViewModel::goToPage },
+                                onRetryList = remember { workItemsViewModel::retryList },
+                                onRetryDetail = remember { workItemsViewModel::retryDetail },
                                 // An item opened directly came from a list elsewhere (a search, the
                                 // timeline, a notification), so back returns there, not to this
                                 // repository's own list.
-                                onBackToList = if (route.number != null) leave else workItemsViewModel::backToList,
+                                onBackToList = if (route.number != null) leave else remember { workItemsViewModel::backToList },
                                 onBack = leave,
-                                onAuthenticationExpired = ::signOut,
+                                onAuthenticationExpired = signOut,
                             )
                         }
                         is Route.BranchDetail -> BranchDetailScreen(
                             owner = route.owner,
                             name = route.name,
                             ref = route.ref,
-                            codeBrowserState = codeBrowserState,
+                            codeBrowserState = heldWhilePushedIn(codeBrowserState),
                             codeViewerPreferences = codeViewerPreferences,
-                            onEntrySelected = codeBrowserViewModel::openEntry,
-                            onBreadcrumbSelected = codeBrowserViewModel::openBreadcrumb,
-                            onRetryCodeBrowser = codeBrowserViewModel::retry,
+                            onEntrySelected = remember { codeBrowserViewModel::openEntry },
+                            onBreadcrumbSelected = remember { codeBrowserViewModel::openBreadcrumb },
+                            onRetryCodeBrowser = remember { codeBrowserViewModel::retry },
                             onCodeBrowserBack = { if (!codeBrowserViewModel.navigateUp()) leaveBranchDetail() },
-                            onNavigateImage = codeBrowserViewModel::navigateImage,
-                            onSetCodeWordWrap = settingsViewModel::setCodeWordWrapEnabled,
-                            onSetCodeFontSize = settingsViewModel::setCodeFontSizeSp,
-                            onOpenSibling = codeBrowserViewModel::openSibling,
-                            onToggleFolder = codeBrowserViewModel::toggleFolder,
-                            onLoadCounterpart = codeBrowserViewModel::loadCounterpart,
-                            historyState = historyState,
-                            onCommitSelected = historyViewModel::openCommit,
-                            onHistoryNextPage = historyViewModel::nextPage,
-                            onHistoryPreviousPage = historyViewModel::previousPage,
-                            onRetryHistoryList = historyViewModel::retryList,
-                            onRetryHistoryDetail = historyViewModel::retryDetail,
-                            onRetryPatch = historyViewModel::retryPatch,
-                            onFileSelected = historyViewModel::openFileDiff,
-                            onShowAdjacentFile = historyViewModel::openAdjacentFileDiff,
-                            onClearFileSelection = historyViewModel::clearFileSelection,
-                            onHistoryBackToList = historyViewModel::backToList,
-                            onHistoryBack = ::leaveBranchDetail,
+                            onNavigateImage = remember { codeBrowserViewModel::navigateImage },
+                            onSetCodeWordWrap = remember { settingsViewModel::setCodeWordWrapEnabled },
+                            onSetCodeFontSize = remember { settingsViewModel::setCodeFontSizeSp },
+                            onOpenSibling = remember { codeBrowserViewModel::openSibling },
+                            onToggleFolder = remember { codeBrowserViewModel::toggleFolder },
+                            onLoadCounterpart = remember { codeBrowserViewModel::loadCounterpart },
+                            historyState = heldWhilePushedIn(historyState),
+                            onCommitSelected = remember { historyViewModel::openCommit },
+                            onHistoryNextPage = remember { historyViewModel::nextPage },
+                            onHistoryPreviousPage = remember { historyViewModel::previousPage },
+                            onRetryHistoryList = remember { historyViewModel::retryList },
+                            onRetryHistoryDetail = remember { historyViewModel::retryDetail },
+                            onRetryPatch = remember { historyViewModel::retryPatch },
+                            onFileSelected = remember { historyViewModel::openFileDiff },
+                            onShowAdjacentFile = remember { historyViewModel::openAdjacentFileDiff },
+                            onClearFileSelection = remember { historyViewModel::clearFileSelection },
+                            onHistoryBackToList = remember { historyViewModel::backToList },
+                            onHistoryBack = leaveBranchDetail,
                             onViewWorkItems = { push(Route.WorkItems(route.owner, route.name)) },
-                            onClose = ::leaveBranchDetail,
-                            onAuthenticationExpired = ::signOut,
+                            onClose = leaveBranchDetail,
+                            onAuthenticationExpired = signOut,
                         )
                         Route.Repositories -> repositoryList()
                         Route.Compare -> CompareScreen(
                             state = workbenchState.compare,
                             fontSizeSp = settingsState.codeFontSizeSp,
-                            onSwap = workbenchViewModel::swapSides,
-                            onClose = workbenchViewModel::closeCompare,
+                            onSwap = remember { workbenchViewModel::swapSides },
+                            onClose = remember { workbenchViewModel::closeCompare },
                         )
                     }
                     }
-                    }
+                    } }
+                    val tabScreen: @Composable (AppTab) -> Unit = remember(screen) { { screen(it.route) } }
+                    val target = currentRoute.takeIf { sessionReady } ?: Route.Repositories
+                    val tabBelow = routeStack.lastOrNull { it.isTab }?.tab ?: AppTab.HOME
+                    PushedOver(
+                        above = target.takeUnless { sessionReady && it.isTab },
+                        aboveKey = { it::class },
+                        // The session has just been found: the first screen takes the waiting
+                        // one's place where it stands. Nothing was navigated, so nothing slides.
+                        direction = { if (shownReady[0]) (stackDepth - shownDepth[0]).coerceIn(-1, 1) else 0 },
+                        // Tabs sit side by side: going from one to another passes the ones between.
+                        below = if (sessionReady) ({ TabPager(AppTab.entries, tabBelow, content = tabScreen) }) else null,
+                        content = screen,
+                    )
                 }
               }
                 LaunchedEffect(viewModel) {
@@ -685,7 +694,10 @@ class MainActivity : ComponentActivity() {
                         },
                     )
                 }
-                SplashOverlay()
+                if (confirmExit) {
+                    ExitConfirmDialog(onStay = { confirmExit = false }, onExit = { finish() })
+                }
+                SplashOverlay(settled = sessionReady || state.sessionReadyOrNull() != null)
             }
         }
         consumeCallback(intent)

app/src/main/java/com/ubisam/ubgitea/feature/codebrowser/CodeBrowserScreen.kt

@@ -25,19 +25,19 @@ import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.BoxScope
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.ColumnScope
+import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.offset
-import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.heightIn
+import androidx.compose.foundation.layout.offset
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.statusBarsPadding
 import androidx.compose.foundation.layout.width
-import androidx.compose.foundation.rememberScrollState
-import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.LinearProgressIndicator
@@ -86,6 +86,7 @@ import com.ubisam.ubgitea.feature.codebrowser.content.ContentClassification
 import com.ubisam.ubgitea.ui.components.CenteredLoading
 import com.ubisam.ubgitea.ui.components.CenteredMessage
 import com.ubisam.ubgitea.ui.components.ScreenTopBar
+import com.ubisam.ubgitea.ui.components.ScrollTopLazyColumn
 import com.ubisam.ubgitea.ui.components.UBIcon
 import java.io.File
 import java.io.IOException
@@ -127,7 +128,7 @@ fun CodeBrowserScreen(
                 if (state.entries.isEmpty()) {
                     CenteredMessage(stringResource(R.string.codebrowser_directory_empty))
                 } else {
-                    LazyColumn(Modifier.weight(1f), contentPadding = PaddingValues(start = 20.dp, end = 20.dp, top = 4.dp, bottom = 16.dp)) {
+                    ScrollTopLazyColumn(Modifier.weight(1f), contentPadding = PaddingValues(start = 20.dp, end = 20.dp, top = 4.dp, bottom = 16.dp)) {
                         itemsIndexed(state.entries, key = { _, entry -> entry.path.value }) { index, entry ->
                             EntryRow(entry, index == 0, index == state.entries.lastIndex, onEntrySelected)
                         }

app/src/main/java/com/ubisam/ubgitea/feature/history/HistoryScreen.kt

@@ -14,7 +14,6 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.heightIn
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.width
-import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.shape.RoundedCornerShape
@@ -51,6 +50,7 @@ import com.ubisam.ubgitea.ui.components.CenteredMessage
 import com.ubisam.ubgitea.ui.components.EmptyCup
 import com.ubisam.ubgitea.ui.components.ListCard
 import com.ubisam.ubgitea.ui.components.MonoChip
+import com.ubisam.ubgitea.ui.components.ScrollTopLazyColumn
 import com.ubisam.ubgitea.ui.components.SectionTitle
 import com.ubisam.ubgitea.ui.components.StatusBadge
 import com.ubisam.ubgitea.ui.formatInstant
@@ -89,7 +89,7 @@ fun HistoryScreen(
                 if (state.commits.isEmpty()) {
                     CenteredMessage(stringResource(R.string.history_empty), decoration = { EmptyCup() })
                 } else {
-                    LazyColumn(Modifier.weight(1f), contentPadding = PaddingValues(start = 20.dp, end = 20.dp, top = 16.dp)) {
+                    ScrollTopLazyColumn(Modifier.weight(1f), contentPadding = PaddingValues(start = 20.dp, end = 20.dp, top = 16.dp)) {
                         itemsIndexed(state.commits, key = { _, commit -> commit.id }) { index, commit ->
                             CommitRow(commit, index == 0, index == state.commits.lastIndex) { onCommitSelected(commit) }
                         }
@@ -177,7 +177,7 @@ private fun CommitDetailView(
     onFileSelected: (FileChange) -> Unit,
 ) {
     val canOpenFileDiff = state.patch is PatchUiState.Loaded
-    LazyColumn(Modifier.fillMaxSize(), contentPadding = PaddingValues(top = 16.dp, bottom = 24.dp)) {
+    ScrollTopLazyColumn(Modifier.fillMaxSize(), contentPadding = PaddingValues(top = 16.dp, bottom = 24.dp)) {
         item(key = "commit") {
             ListCard(Modifier.padding(horizontal = 20.dp)) {
                 Column(Modifier.padding(16.dp), verticalArrangement = Arrangement.spacedBy(8.dp)) {

app/src/main/java/com/ubisam/ubgitea/feature/home/HomeScreen.kt

@@ -28,7 +28,6 @@ import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.FilterChip
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
@@ -63,10 +62,12 @@ import com.ubisam.ubgitea.domain.workitems.WorkTypeFilter
 import com.ubisam.ubgitea.ui.components.ActivityTone
 import com.ubisam.ubgitea.ui.components.BrandTopBar
 import com.ubisam.ubgitea.ui.components.CenteredMessage
+import com.ubisam.ubgitea.ui.components.FilterChip
 import com.ubisam.ubgitea.ui.components.KindTile
 import com.ubisam.ubgitea.ui.components.ListCard
 import com.ubisam.ubgitea.ui.components.ListSkeleton
 import com.ubisam.ubgitea.ui.components.MonoChip
+import com.ubisam.ubgitea.ui.components.ScrollTopLazyColumn
 import com.ubisam.ubgitea.ui.components.SectionTitle
 import com.ubisam.ubgitea.ui.components.StatusBadge
 import com.ubisam.ubgitea.ui.components.TabTitle
@@ -159,7 +160,7 @@ private fun HomeContent(
                 LazyColumn(Modifier.weight(0.5f).fillMaxHeight(), contentPadding = PaddingValues(bottom = 24.dp)) {
                     overview(state, vertical = true, onNavigate, onSelectSource, showToday)
                 }
-                LazyColumn(
+                ScrollTopLazyColumn(
                     Modifier.weight(0.5f).fillMaxHeight(),
                     state = timelineState,
                     // Starts level with the headline card on the left.
@@ -169,7 +170,7 @@ private fun HomeContent(
                 }
             }
         } else {
-            LazyColumn(Modifier.fillMaxSize(), state = listState, contentPadding = PaddingValues(bottom = 24.dp)) {
+            ScrollTopLazyColumn(Modifier.fillMaxSize(), state = listState, contentPadding = PaddingValues(bottom = 24.dp)) {
                 overview(state, vertical = false, onNavigate, onSelectSource, showToday)
                 timeline(state, onNavigate, onSelectFilter, onSetTodayOnly, onLoadMore)
             }

app/src/main/java/com/ubisam/ubgitea/feature/notifications/NotificationsScreen.kt

@@ -13,11 +13,9 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
-import androidx.compose.material3.FilterChip
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
@@ -43,8 +41,10 @@ import com.ubisam.ubgitea.ui.components.ActivityTone
 import com.ubisam.ubgitea.ui.components.BrandTopBar
 import com.ubisam.ubgitea.ui.components.CenteredMessage
 import com.ubisam.ubgitea.ui.components.EmptyCup
+import com.ubisam.ubgitea.ui.components.FilterChip
 import com.ubisam.ubgitea.ui.components.KindTile
 import com.ubisam.ubgitea.ui.components.ListSkeleton
+import com.ubisam.ubgitea.ui.components.ScrollTopLazyColumn
 import com.ubisam.ubgitea.ui.components.StatusBadge
 import com.ubisam.ubgitea.ui.formatRelative
 import com.ubisam.ubgitea.ui.theme.UBGiteaTheme
@@ -120,7 +120,7 @@ private fun NotificationsList(
     onNextPage: () -> Unit,
     onPreviousPage: () -> Unit,
 ) {
-    LazyColumn(Modifier.fillMaxSize(), contentPadding = PaddingValues(top = 16.dp, bottom = 8.dp)) {
+    ScrollTopLazyColumn(Modifier.fillMaxSize(), contentPadding = PaddingValues(top = 16.dp, bottom = 8.dp)) {
         itemsIndexed(state.items, key = { _, item -> item.id }) { index, notification ->
             NotificationRow(notification, index == 0, index == state.items.lastIndex) { onSelected(notification) }
         }

app/src/main/java/com/ubisam/ubgitea/feature/repositories/RepositoryListScreen.kt

@@ -17,14 +17,12 @@ import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.heightIn
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.widthIn
-import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.selection.selectable
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.Button
 import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.FilterChip
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
@@ -36,6 +34,7 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateMapOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
@@ -63,12 +62,16 @@ import com.ubisam.ubgitea.ui.components.CautionBanner
 import com.ubisam.ubgitea.ui.components.CenteredLoading
 import com.ubisam.ubgitea.ui.components.CenteredMessage
 import com.ubisam.ubgitea.ui.components.EmptyCup
+import com.ubisam.ubgitea.ui.components.FilterChip
 import com.ubisam.ubgitea.ui.components.ListSkeleton
 import com.ubisam.ubgitea.ui.components.MonoChip
 import com.ubisam.ubgitea.ui.components.ScreenTopBar
+import com.ubisam.ubgitea.ui.components.ScrollTopLazyColumn
 import com.ubisam.ubgitea.ui.components.SectionTitle
 import com.ubisam.ubgitea.ui.components.StatusBadge
-import com.ubisam.ubgitea.ui.components.TabGlide
+import com.ubisam.ubgitea.ui.components.TabGlideMillis
+import com.ubisam.ubgitea.ui.components.TabPager
+import kotlinx.coroutines.delay
 import com.ubisam.ubgitea.ui.components.TeaPullToRefreshBox
 import com.ubisam.ubgitea.ui.components.UBIcon
 import com.ubisam.ubgitea.ui.components.UbiSamLogo
@@ -104,8 +107,50 @@ fun RepositoryListScreen(
     // Changing tab reloads through Loading, which does not say which tab it is loading. Keeping
     // the tab that was asked for lets the tab row stay where it is while the list under it glides.
     var requestedMode by remember { mutableStateOf<RepositoryListMode?>(null) }
+    // What each tab last showed. A tab change, a refresh and a page turn all pass through
+    // Loading; showing the last list meanwhile keeps the header and the rows where they are, so
+    // the new list replaces the old one in place and nothing appears to settle afterwards.
+    val seen = remember { mutableStateMapOf<RepositoryListMode, RepositoryListUiState>() }
+    var seenMode by remember { mutableStateOf<RepositoryListMode?>(null) }
+    // A repository's branches open beside the list, not in place of it. The list stays built
+    // underneath and the branches stay built on the way out, so going in and coming back are
+    // both a slide, and neither starts by building a screen of rows.
+    var lastReferences by remember { mutableStateOf<RepositoryListUiState?>(null) }
+    val inReferences = state is RepositoryListUiState.ReferencesLoading ||
+        state is RepositoryListUiState.ReferencesContent ||
+        state is RepositoryListUiState.ReferencesError
     LaunchedEffect(state) {
         if (state != RepositoryListUiState.Loading) requestedMode = null
+        when (state) {
+            is RepositoryListUiState.Content -> {
+                seen[state.mode] = state
+                seenMode = state.mode
+            }
+            is RepositoryListUiState.Empty -> {
+                seen[state.mode] = state
+                seenMode = state.mode
+            }
+            // Another account may sign in next: its lists are not these.
+            RepositoryListUiState.SignedOut -> {
+                seen.clear()
+                seenMode = null
+                lastReferences = null
+            }
+            is RepositoryListUiState.ReferencesLoading,
+            is RepositoryListUiState.ReferencesContent,
+            is RepositoryListUiState.ReferencesError -> lastReferences = state
+            else -> Unit
+        }
+    }
+    // Branches that arrive while their screen is still sliding in wait for it to stop: rows built
+    // in the middle of the slide made it stall.
+    var slidingIn by remember { mutableStateOf(false) }
+    LaunchedEffect(inReferences) {
+        if (inReferences) {
+            slidingIn = true
+            delay(TabGlideMillis.toLong())
+            slidingIn = false
+        }
     }
     val showAllRepositories = {
         requestedMode = RepositoryListMode.ALL
@@ -127,71 +172,6 @@ fun RepositoryListScreen(
                 stringResource(R.string.repositories_cancel_login),
                 onCancelSignIn,
             )
-            RepositoryListUiState.Loading,
-            is RepositoryListUiState.Empty,
-            is RepositoryListUiState.Content -> {
-                BrandTopBar(state.accountNameOrNull(), instanceHost, onViewSettings, onLogout)
-                val mode = when (state) {
-                    is RepositoryListUiState.Content -> state.mode
-                    is RepositoryListUiState.Empty -> state.mode
-                    else -> requestedMode
-                }
-                if (mode == null) {
-                    ListSkeleton(label = stringResource(R.string.repositories_loading))
-                } else {
-                    Surface(
-                        color = MaterialTheme.colorScheme.surface,
-                        shape = RoundedCornerShape(bottomStart = 28.dp, bottomEnd = 28.dp),
-                        modifier = Modifier.fillMaxWidth(),
-                    ) {
-                        // No title: the selected tab already says this is 저장소.
-                        Column(Modifier.padding(bottom = 12.dp)) {
-                            ModeTabs(mode, showAllRepositories, showFavorites)
-                            if (state is RepositoryListUiState.Content &&
-                                mode == RepositoryListMode.ALL && state.organizations.isNotEmpty()
-                            ) {
-                                OrganizationFilterRow(state.organization, state.organizations, onSelectOrganization)
-                            }
-                        }
-                    }
-                    TabGlide(mode to state, { it.first.ordinal }, Modifier.weight(1f).fillMaxWidth()) { (_, shown) ->
-                        Column(Modifier.fillMaxSize()) {
-                            when (shown) {
-                                is RepositoryListUiState.Content -> RepositoryContent(
-                                    shown,
-                                    onRepositorySelected,
-                                    onNextPage,
-                                    onPreviousPage,
-                                    onRefreshRepositories,
-                                    onRetryLastPushedBranch,
-                                    showAllRepositories,
-                                    showFavorites,
-                                    onToggleFavorite,
-                                )
-                                // FAVORITES-mode empty doesn't mean the account has nothing to show -- it
-                                // means nothing is starred *yet*, while 전체 저장소 (the other tab, right
-                                // above this message) is very likely non-empty. The only sensible primary
-                                // action here is "go look at 전체 저장소 and star something", never 로그아웃.
-                                is RepositoryListUiState.Empty -> if (shown.mode == RepositoryListMode.FAVORITES) {
-                                    CenteredMessage(
-                                        stringResource(R.string.repositories_favorites_empty),
-                                        action = stringResource(R.string.repositories_favorites_empty_action),
-                                        onAction = showAllRepositories,
-                                        decoration = { EmptyCup() },
-                                    )
-                                } else {
-                                    CenteredMessage(
-                                        stringResource(R.string.repositories_empty_account, shown.accountName),
-                                        action = stringResource(R.string.repositories_logout),
-                                        onAction = onLogout,
-                                    )
-                                }
-                                else -> ListSkeleton(label = stringResource(R.string.repositories_loading))
-                            }
-                        }
-                    }
-                }
-            }
             is RepositoryListUiState.Error -> {
                 BrandTopBar(state.accountNameOrNull(), instanceHost, onViewSettings, onLogout)
                 val needsLogin = state.type == RepositoryListError.AUTHENTICATION_EXPIRED ||
@@ -207,30 +187,123 @@ fun RepositoryListScreen(
                     onSecondaryAction = onLogout,
                 )
             }
-            is RepositoryListUiState.ReferencesLoading -> {
-                BackHandler(onBack = onBackToRepositories)
-                ScreenTopBar(title = state.repository.name, onBack = onBackToRepositories, subtitle = state.repository.owner)
-                CenteredLoading(stringResource(R.string.repositories_references_loading))
-            }
-            is RepositoryListUiState.ReferencesContent -> {
-                BackHandler(onBack = onBackToRepositories)
-                ReferencesContent(state, onReferenceSelected, onReferencesRefresh, onViewWorkItems, onBackToRepositories)
-            }
-            is RepositoryListUiState.ReferencesError -> {
-                BackHandler(onBack = onBackToRepositories)
-                ScreenTopBar(title = state.repository.name, onBack = onBackToRepositories, subtitle = state.repository.owner)
-                CenteredMessage(
-                    stringResource(state.type.messageResource),
-                    action = stringResource(R.string.repositories_retry),
-                    onAction = onRetry,
-                    secondaryAction = stringResource(R.string.repositories_back),
-                    onSecondaryAction = onBackToRepositories,
-                )
+            RepositoryListUiState.Loading,
+            is RepositoryListUiState.Empty,
+            is RepositoryListUiState.Content,
+            is RepositoryListUiState.ReferencesLoading,
+            is RepositoryListUiState.ReferencesContent,
+            is RepositoryListUiState.ReferencesError -> TabPager(
+                RepositoryDepth.entries,
+                if (inReferences) RepositoryDepth.REFERENCES else RepositoryDepth.LIST,
+            ) { depth ->
+                Column(Modifier.fillMaxSize()) {
+                    if (depth == RepositoryDepth.LIST) {
+                        val listState = if (inReferences) seenMode?.let { seen[it] } ?: RepositoryListUiState.Loading else state
+                        val loadingMode = requestedMode ?: seenMode
+                        val shownState = if (listState == RepositoryListUiState.Loading) loadingMode?.let { seen[it] } ?: listState else listState
+                        BrandTopBar(shownState.accountNameOrNull(), instanceHost, onViewSettings, onLogout)
+                        val mode = when (shownState) {
+                            is RepositoryListUiState.Content -> shownState.mode
+                            is RepositoryListUiState.Empty -> shownState.mode
+                            else -> loadingMode
+                        }
+                        if (mode == null) {
+                            ListSkeleton(label = stringResource(R.string.repositories_loading))
+                        } else {
+                            Surface(
+                                color = MaterialTheme.colorScheme.surface,
+                                shape = RoundedCornerShape(bottomStart = 28.dp, bottomEnd = 28.dp),
+                                modifier = Modifier.fillMaxWidth(),
+                            ) {
+                                // No title: the selected tab already says this is 저장소.
+                                Column(Modifier.padding(bottom = 12.dp)) {
+                                    ModeTabs(mode, showAllRepositories, showFavorites)
+                                    if (shownState is RepositoryListUiState.Content &&
+                                        mode == RepositoryListMode.ALL && shownState.organizations.isNotEmpty()
+                                    ) {
+                                        OrganizationFilterRow(shownState.organization, shownState.organizations, onSelectOrganization)
+                                    }
+                                }
+                            }
+                            // Both lists stay composed side by side, so changing tab only slides: building
+                            // a list of rows in the frame the slide starts on is what made it stall.
+                            TabPager(RepositoryListMode.entries, mode, Modifier.weight(1f).fillMaxWidth()) { page ->
+                                val shown = if (page == mode) shownState else seen[page] ?: RepositoryListUiState.Loading
+                                Column(Modifier.fillMaxSize()) {
+                                    when (shown) {
+                                        is RepositoryListUiState.Content -> RepositoryContent(
+                                            shown,
+                                            onRepositorySelected,
+                                            onNextPage,
+                                            onPreviousPage,
+                                            onRefreshRepositories,
+                                            onRetryLastPushedBranch,
+                                            showAllRepositories,
+                                            showFavorites,
+                                            onToggleFavorite,
+                                        )
+                                        // FAVORITES-mode empty doesn't mean the account has nothing to show -- it
+                                        // means nothing is starred *yet*, while 전체 저장소 (the other tab, right
+                                        // above this message) is very likely non-empty. The only sensible primary
+                                        // action here is "go look at 전체 저장소 and star something", never 로그아웃.
+                                        is RepositoryListUiState.Empty -> if (shown.mode == RepositoryListMode.FAVORITES) {
+                                            CenteredMessage(
+                                                stringResource(R.string.repositories_favorites_empty),
+                                                action = stringResource(R.string.repositories_favorites_empty_action),
+                                                onAction = showAllRepositories,
+                                                decoration = { EmptyCup() },
+                                            )
+                                        } else {
+                                            CenteredMessage(
+                                                stringResource(R.string.repositories_empty_account, shown.accountName),
+                                                action = stringResource(R.string.repositories_logout),
+                                                onAction = onLogout,
+                                            )
+                                        }
+                                        else -> ListSkeleton(label = stringResource(R.string.repositories_loading))
+                                    }
+                                }
+                            }
+                        }
+                    } else {
+                        val arrived = if (inReferences) state else lastReferences
+                        val shown = if (slidingIn && arrived is RepositoryListUiState.ReferencesContent) {
+                            RepositoryListUiState.ReferencesLoading(arrived.accountName, arrived.repository)
+                        } else {
+                            arrived
+                        }
+                        when (shown) {
+                            is RepositoryListUiState.ReferencesLoading -> {
+                                BackHandler(onBack = onBackToRepositories)
+                                ScreenTopBar(title = shown.repository.name, onBack = onBackToRepositories, subtitle = shown.repository.owner)
+                                CenteredLoading(stringResource(R.string.repositories_references_loading))
+                            }
+                            is RepositoryListUiState.ReferencesContent -> {
+                                BackHandler(onBack = onBackToRepositories)
+                                ReferencesContent(shown, onReferenceSelected, onReferencesRefresh, onViewWorkItems, onBackToRepositories)
+                            }
+                            is RepositoryListUiState.ReferencesError -> {
+                                BackHandler(onBack = onBackToRepositories)
+                                ScreenTopBar(title = shown.repository.name, onBack = onBackToRepositories, subtitle = shown.repository.owner)
+                                CenteredMessage(
+                                    stringResource(shown.type.messageResource),
+                                    action = stringResource(R.string.repositories_retry),
+                                    onAction = onRetry,
+                                    secondaryAction = stringResource(R.string.repositories_back),
+                                    onSecondaryAction = onBackToRepositories,
+                                )
+                            }
+                            else -> Unit
+                        }
+                    }
+                }
             }
         }
     }
 }
 
+private enum class RepositoryDepth { LIST, REFERENCES }
+
 @Composable
 private fun SignedOutState(message: String, action: String, onAction: () -> Unit) {
     Column(
@@ -267,7 +340,7 @@ private fun RepositoryContent(
         CautionBanner(stringResource(R.string.repositories_offline_cached_banner, formatInstant(cachedAt)))
     }
     TeaPullToRefreshBox(onRefresh = onRefreshRepositories, modifier = Modifier.fillMaxSize()) {
-        LazyColumn(
+        ScrollTopLazyColumn(
             modifier = Modifier.fillMaxSize().modeSwipeGesture(state.mode, onShowAllRepositories, onShowFavorites),
             contentPadding = PaddingValues(top = 16.dp, bottom = 8.dp),
         ) {
@@ -533,7 +606,7 @@ private fun ReferencesContent(
         },
     )
     TeaPullToRefreshBox(onRefresh = onRefresh, modifier = Modifier.fillMaxSize()) {
-        LazyColumn(Modifier.fillMaxSize(), contentPadding = PaddingValues(top = 16.dp, bottom = 24.dp)) {
+        ScrollTopLazyColumn(Modifier.fillMaxSize(), contentPadding = PaddingValues(top = 16.dp, bottom = 24.dp)) {
             item(key = "branches-title") { SectionTitle(stringResource(R.string.repositories_branches_title)) }
             if (state.branches.isEmpty()) {
                 item(key = "branches-empty") { EmptyReferenceMessage(stringResource(R.string.repositories_branches_empty)) }

app/src/main/java/com/ubisam/ubgitea/feature/repositories/RepositoryListViewModel.kt

@@ -185,6 +185,10 @@ class RepositoryListViewModel(
     val browserRequests: SharedFlow<String> = mutableBrowserRequests.asSharedFlow()
     private var operation: Job? = null
     private val rowBranchJobs = mutableMapOf<RepositoryCoordinates, Job>()
+    // The branch each repository was last found to have been pushed to. A list that is loaded
+    // again (a tab change, a refresh, a page turn) shows this while it checks, where it used to
+    // show "checking" on every row: the rows changed height and their text changed line, twice.
+    private val knownRowBranches = mutableMapOf<RepositoryCoordinates, LastPushedBranchUiState>()
     // Repositories whose star/unstar request is still on its way. A second tap on the same row is
     // ignored until the first request settles: the tap flips the star at once, so without this a
     // quick double tap sent a star and an unstar together, and whichever reached the server last
@@ -475,6 +479,7 @@ class RepositoryListViewModel(
             tokenVault.clear()
             repositoryListCache.clear()
             activeAccountName = null
+            knownRowBranches.clear()
             hasAuthenticatedSession = false
             repositoryContent = null
             cachedOrganizations = null
@@ -496,6 +501,7 @@ class RepositoryListViewModel(
             if (failure is ApiFailure.AuthenticationExpired) {
                 tokenVault.clear()
                 activeAccountName = null
+                knownRowBranches.clear()
                 hasAuthenticatedSession = false
             }
             mutableState.value = RepositoryListUiState.Error(
@@ -527,6 +533,7 @@ class RepositoryListViewModel(
             if (failure is ApiFailure.AuthenticationExpired) {
                 tokenVault.clear()
                 activeAccountName = null
+                knownRowBranches.clear()
                 hasAuthenticatedSession = false
             }
             val error = failure.toRepositoryListError()
@@ -563,7 +570,10 @@ class RepositoryListViewModel(
             // showing) -- FavoriteStar's own rendering already handles that mode without consulting
             // favoriteAction at all, so the cross-reference below only matters for ALL.
             val alreadyStarred = if (mode == RepositoryListMode.ALL) loadStarredCoordinatesOnce() else emptySet()
-            val rows = pageItems.map { it.toUiModel(alreadyStarred = it.coordinates in alreadyStarred) }
+            val rows = pageItems.map { summary ->
+                val row = summary.toUiModel(alreadyStarred = summary.coordinates in alreadyStarred)
+                knownRowBranches[row.coordinates]?.let { row.copy(lastPushedBranch = it) } ?: row
+            }
             if (rows.isEmpty() && page == 1) {
                 repositoryContent = null
                 mutableState.value = RepositoryListUiState.Empty(accountName, mode, organization)
@@ -580,12 +590,13 @@ class RepositoryListViewModel(
             )
             repositoryContent = content
             mutableState.value = content
-            loadRowBranches(content)
+            loadRowBranches(content, all = true)
         } catch (failure: Throwable) {
             if (failure is CancellationException) throw failure
             if (failure is ApiFailure.AuthenticationExpired) {
                 tokenVault.clear()
                 activeAccountName = null
+                knownRowBranches.clear()
                 hasAuthenticatedSession = false
                 repositoryContent = null
             }
@@ -731,9 +742,9 @@ class RepositoryListViewModel(
         return loaded
     }
 
-    private fun loadRowBranches(content: RepositoryListUiState.Content) {
+    private fun loadRowBranches(content: RepositoryListUiState.Content, all: Boolean = false) {
         content.repositories
-            .filter { it.lastPushedBranch is LastPushedBranchUiState.Loading }
+            .filter { all || it.lastPushedBranch is LastPushedBranchUiState.Loading }
             .forEach { launchRowBranchFetch(it.coordinates) }
     }
 
@@ -745,22 +756,21 @@ class RepositoryListViewModel(
                 val latest = branches
                     .filter { it.commitAtEpochMillis != null }
                     .maxByOrNull { requireNotNull(it.commitAtEpochMillis) }
-                updateRow(coordinates) {
-                    it.copy(
-                        lastPushedBranch = latest?.let { branch ->
-                            LastPushedBranchUiState.Loaded(branch.name.value)
-                        } ?: if (branches.isEmpty()) {
-                            LastPushedBranchUiState.Empty
-                        } else {
-                            LastPushedBranchUiState.Failed
-                        },
-                    )
+                val found = latest?.let { branch ->
+                    LastPushedBranchUiState.Loaded(branch.name.value)
+                } ?: if (branches.isEmpty()) {
+                    LastPushedBranchUiState.Empty
+                } else {
+                    LastPushedBranchUiState.Failed
                 }
+                if (found != LastPushedBranchUiState.Failed) knownRowBranches[coordinates] = found
+                updateRow(coordinates) { it.copy(lastPushedBranch = found) }
             } catch (failure: Throwable) {
                 if (failure is CancellationException) throw failure
                 if (failure is ApiFailure.AuthenticationExpired) {
                     clearSessionOnAuthenticationExpired()
-                } else {
+                } else if (coordinates !in knownRowBranches) {
+                    // A check that fails leaves a branch already known where it is.
                     updateRow(coordinates) { it.copy(lastPushedBranch = LastPushedBranchUiState.Failed) }
                 }
             }
@@ -771,6 +781,7 @@ class RepositoryListViewModel(
         cancelRowBranchJobs()
         tokenVault.clear()
         activeAccountName = null
+        knownRowBranches.clear()
         hasAuthenticatedSession = false
         repositoryContent = null
         mutableState.value = RepositoryListUiState.Error(RepositoryListError.AUTHENTICATION_EXPIRED)
@@ -830,6 +841,7 @@ class RepositoryListViewModel(
             if (failure is ApiFailure.AuthenticationExpired) {
                 tokenVault.clear()
                 activeAccountName = null
+                knownRowBranches.clear()
                 hasAuthenticatedSession = false
                 repositoryContent = null
                 mutableState.value = RepositoryListUiState.Error(RepositoryListError.AUTHENTICATION_EXPIRED)

app/src/main/java/com/ubisam/ubgitea/feature/settings/SettingsScreen.kt

@@ -15,7 +15,6 @@ import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.Button
-import androidx.compose.material3.FilterChip
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedButton
@@ -37,6 +36,7 @@ import com.ubisam.ubgitea.core.settings.ThemeMode
 import com.ubisam.ubgitea.core.update.AppUpdateUiState
 import com.ubisam.ubgitea.core.update.UpdateCheck
 import com.ubisam.ubgitea.ui.components.Avatar
+import com.ubisam.ubgitea.ui.components.FilterChip
 import com.ubisam.ubgitea.ui.components.ListCard
 import com.ubisam.ubgitea.ui.components.ScreenTopBar
 import com.ubisam.ubgitea.ui.components.SectionTitle

app/src/main/java/com/ubisam/ubgitea/feature/work/WorkScreen.kt

@@ -11,11 +11,9 @@ import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.FilterChip
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
@@ -43,8 +41,10 @@ import com.ubisam.ubgitea.ui.components.ActivityTone
 import com.ubisam.ubgitea.ui.components.BrandTopBar
 import com.ubisam.ubgitea.ui.components.CenteredMessage
 import com.ubisam.ubgitea.ui.components.EmptyCup
+import com.ubisam.ubgitea.ui.components.FilterChip
 import com.ubisam.ubgitea.ui.components.KindTile
 import com.ubisam.ubgitea.ui.components.ListSkeleton
+import com.ubisam.ubgitea.ui.components.ScrollTopLazyColumn
 import com.ubisam.ubgitea.ui.components.StatusBadge
 import com.ubisam.ubgitea.ui.components.TeaPullToRefreshBox
 import com.ubisam.ubgitea.ui.components.UBIcon
@@ -147,7 +147,7 @@ private fun WorkList(
     onRefresh: () -> Unit,
 ) {
     TeaPullToRefreshBox(onRefresh = onRefresh, modifier = Modifier.fillMaxSize()) {
-        LazyColumn(Modifier.fillMaxSize(), contentPadding = PaddingValues(top = 16.dp, bottom = 8.dp)) {
+        ScrollTopLazyColumn(Modifier.fillMaxSize(), contentPadding = PaddingValues(top = 16.dp, bottom = 8.dp)) {
             items(
                 count = state.items.size,
                 key = { index -> state.items[index].let { "${it.repository.owner}/${it.repository.name}#${it.number}" } },

app/src/main/java/com/ubisam/ubgitea/feature/workitems/WorkItemsScreen.kt

@@ -13,7 +13,6 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.width
-import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.rememberScrollState
@@ -68,6 +67,7 @@ import com.ubisam.ubgitea.ui.components.ListCard
 import com.ubisam.ubgitea.ui.components.ListSkeleton
 import com.ubisam.ubgitea.ui.components.MonoChip
 import com.ubisam.ubgitea.ui.components.ScreenTopBar
+import com.ubisam.ubgitea.ui.components.ScrollTopLazyColumn
 import com.ubisam.ubgitea.ui.components.SectionTitle
 import com.ubisam.ubgitea.ui.components.StatusBadge
 import com.ubisam.ubgitea.ui.components.TabGlide
@@ -183,7 +183,7 @@ private fun ColumnScope.ListBody(
             ListSkeleton()
         }
         is WorkItemsUiState.IssueList -> {
-            LazyColumn(Modifier.weight(1f), contentPadding = PaddingValues(top = 16.dp, bottom = 8.dp)) {
+            ScrollTopLazyColumn(Modifier.weight(1f), contentPadding = PaddingValues(top = 16.dp, bottom = 8.dp)) {
                 itemsIndexed(state.items, key = { _, issue -> issue.number }) { index, issue ->
                     WorkItemRow(
                         icon = R.drawable.ic_ub_issue,
@@ -203,7 +203,7 @@ private fun ColumnScope.ListBody(
             PageFooter(state.page, state.page > 1, state.hasNextPage, state.totalPages, onPreviousPage, onNextPage, onGoToPage)
         }
         is WorkItemsUiState.PullRequestList -> {
-            LazyColumn(Modifier.weight(1f), contentPadding = PaddingValues(top = 16.dp, bottom = 8.dp)) {
+            ScrollTopLazyColumn(Modifier.weight(1f), contentPadding = PaddingValues(top = 16.dp, bottom = 8.dp)) {
                 itemsIndexed(state.items, key = { _, pr -> pr.number }) { index, pr ->
                     WorkItemRow(
                         icon = if (pr.state == PullRequestState.MERGED) R.drawable.ic_ub_merge else R.drawable.ic_ub_pull_request,
@@ -341,7 +341,7 @@ private fun WorkItemRow(
 
 @Composable
 private fun IssueDetailView(state: WorkItemsUiState.IssueDetailContent) {
-    LazyColumn(Modifier.fillMaxSize(), contentPadding = PaddingValues(top = 16.dp, bottom = 24.dp)) {
+    ScrollTopLazyColumn(Modifier.fillMaxSize(), contentPadding = PaddingValues(top = 16.dp, bottom = 24.dp)) {
         item(key = "header") {
             ListCard(Modifier.padding(horizontal = 20.dp)) {
                 Column(Modifier.padding(16.dp), verticalArrangement = Arrangement.spacedBy(10.dp)) {
@@ -395,7 +395,7 @@ private fun IssueDetailView(state: WorkItemsUiState.IssueDetailContent) {
 
 @Composable
 private fun PullRequestDetailView(state: WorkItemsUiState.PullRequestDetailContent) {
-    LazyColumn(Modifier.fillMaxSize(), contentPadding = PaddingValues(top = 16.dp, bottom = 24.dp)) {
+    ScrollTopLazyColumn(Modifier.fillMaxSize(), contentPadding = PaddingValues(top = 16.dp, bottom = 24.dp)) {
         item(key = "header") {
             ListCard(Modifier.padding(horizontal = 20.dp)) {
                 Column(Modifier.padding(16.dp), verticalArrangement = Arrangement.spacedBy(10.dp)) {

app/src/main/java/com/ubisam/ubgitea/ui/components/Chips.kt

@@ -0,0 +1,39 @@
+package com.ubisam.ubgitea.ui.components
+
+import androidx.compose.material3.FilterChipDefaults
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.compose.material3.FilterChip as MaterialFilterChip
+
+/**
+ * The app's filter chip. A selected chip is outlined in the brand colour so the choice is visible
+ * on a white surface.
+ */
+@Composable
+fun FilterChip(
+    selected: Boolean,
+    onClick: () -> Unit,
+    label: @Composable () -> Unit,
+    modifier: Modifier = Modifier,
+    enabled: Boolean = true,
+    leadingIcon: (@Composable () -> Unit)? = null,
+    trailingIcon: (@Composable () -> Unit)? = null,
+) {
+    MaterialFilterChip(
+        selected = selected,
+        onClick = onClick,
+        label = label,
+        modifier = modifier,
+        enabled = enabled,
+        leadingIcon = leadingIcon,
+        trailingIcon = trailingIcon,
+        border = FilterChipDefaults.filterChipBorder(
+            enabled = enabled,
+            selected = selected,
+            selectedBorderColor = MaterialTheme.colorScheme.primary,
+            selectedBorderWidth = 1.5.dp,
+        ),
+    )
+}

app/src/main/java/com/ubisam/ubgitea/ui/components/Elements.kt

@@ -178,8 +178,13 @@ fun CenteredLoading(message: String?, modifier: Modifier = Modifier) {
         horizontalAlignment = Alignment.CenterHorizontally,
         verticalArrangement = Arrangement.Center,
     ) {
-        TeaCupLoader()
-        if (message != null) Text(message, modifier = Modifier.padding(top = 16.dp), textAlign = TextAlign.Center)
+        // Most loads finish before this would be noticed; the cup is for the ones that do not.
+        AfterShortWait {
+            Column(horizontalAlignment = Alignment.CenterHorizontally) {
+                TeaCupLoader()
+                if (message != null) Text(message, modifier = Modifier.padding(top = 16.dp), textAlign = TextAlign.Center)
+            }
+        }
     }
 }
 

app/src/main/java/com/ubisam/ubgitea/ui/components/ExitConfirmDialog.kt

@@ -0,0 +1,113 @@
+package com.ubisam.ubgitea.ui.components
+
+import androidx.compose.animation.core.Animatable
+import androidx.compose.foundation.BorderStroke
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.widthIn
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material3.Button
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.OutlinedButton
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.alpha
+import androidx.compose.ui.graphics.graphicsLayer
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.window.Dialog
+import com.ubisam.ubgitea.R
+import com.ubisam.ubgitea.ui.theme.UBGiteaTheme
+
+/**
+ * "Leave the app?" confirmation shown when Back is pressed on the Home tab. Staying is the default:
+ * Back, a tap outside and the emphasised "계속 사용" button all call [onStay]; only "종료" calls [onExit].
+ */
+@Composable
+fun ExitConfirmDialog(onStay: () -> Unit, onExit: () -> Unit) {
+    // Entrance: the card grows from 0.92 to 1 while fading in.
+    val progress = remember { Animatable(0f) }
+    LaunchedEffect(Unit) { progress.animateTo(1f, tween180) }
+
+    Dialog(onDismissRequest = onStay) {
+        Surface(
+            modifier = Modifier
+                .widthIn(max = 340.dp)
+                .graphicsLayer {
+                    val scale = 0.92f + 0.08f * progress.value
+                    scaleX = scale
+                    scaleY = scale
+                }
+                .alpha(progress.value),
+            shape = RoundedCornerShape(28.dp),
+            color = MaterialTheme.colorScheme.surface,
+            tonalElevation = 2.dp,
+            shadowElevation = 6.dp,
+            border = BorderStroke(1.dp, MaterialTheme.colorScheme.outlineVariant),
+        ) {
+            Column(
+                modifier = Modifier.padding(24.dp),
+                horizontalAlignment = Alignment.CenterHorizontally,
+            ) {
+                Box(
+                    modifier = Modifier
+                        .size(84.dp)
+                        .background(UBGiteaTheme.colors.brand.copy(alpha = 0.12f), CircleShape),
+                    contentAlignment = Alignment.Center,
+                ) {
+                    TeaCupLoader(size = 40.dp)
+                }
+                Text(
+                    text = stringResource(R.string.shell_exit_title),
+                    modifier = Modifier.padding(top = 20.dp),
+                    style = MaterialTheme.typography.titleLarge,
+                    fontWeight = FontWeight.SemiBold,
+                    color = MaterialTheme.colorScheme.onSurface,
+                    textAlign = TextAlign.Center,
+                )
+                Row(
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .padding(top = 24.dp),
+                    horizontalArrangement = Arrangement.spacedBy(12.dp),
+                ) {
+                    OutlinedButton(
+                        onClick = onExit,
+                        modifier = Modifier
+                            .weight(1f)
+                            .height(48.dp),
+                        shape = RoundedCornerShape(14.dp),
+                    ) {
+                        Text(stringResource(R.string.shell_exit_confirm))
+                    }
+                    Button(
+                        onClick = onStay,
+                        modifier = Modifier
+                            .weight(1f)
+                            .height(48.dp),
+                        shape = RoundedCornerShape(14.dp),
+                    ) {
+                        Text(stringResource(R.string.shell_exit_stay))
+                    }
+                }
+            }
+        }
+    }
+}
+
+private val tween180 = androidx.compose.animation.core.tween<Float>(durationMillis = 180)

app/src/main/java/com/ubisam/ubgitea/ui/components/Motion.kt

@@ -1,7 +1,12 @@
 package com.ubisam.ubgitea.ui.components
 
+import androidx.activity.OnBackPressedDispatcher
+import androidx.activity.OnBackPressedDispatcherOwner
+import androidx.activity.compose.LocalOnBackPressedDispatcherOwner
 import androidx.compose.animation.AnimatedContent
+import androidx.compose.animation.SizeTransform
 import androidx.compose.animation.core.Animatable
+import androidx.compose.animation.core.Easing
 import androidx.compose.animation.core.FastOutSlowInEasing
 import androidx.compose.animation.core.LinearEasing
 import androidx.compose.animation.core.RepeatMode
@@ -9,8 +14,12 @@ import androidx.compose.animation.core.Spring
 import androidx.compose.animation.core.animateFloat
 import androidx.compose.animation.core.infiniteRepeatable
 import androidx.compose.animation.core.rememberInfiniteTransition
+import androidx.compose.animation.core.snap
 import androidx.compose.animation.core.spring
 import androidx.compose.animation.core.tween
+import androidx.compose.animation.core.updateTransition
+import androidx.compose.animation.fadeIn
+import androidx.compose.animation.fadeOut
 import androidx.compose.animation.slideInHorizontally
 import androidx.compose.animation.slideOutHorizontally
 import androidx.compose.animation.togetherWith
@@ -28,6 +37,8 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.pager.HorizontalPager
+import androidx.compose.foundation.pager.rememberPagerState
 import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.ExperimentalMaterial3Api
@@ -36,13 +47,17 @@ import androidx.compose.material3.pulltorefresh.PullToRefreshBox
 import androidx.compose.material3.pulltorefresh.PullToRefreshState
 import androidx.compose.material3.pulltorefresh.rememberPullToRefreshState
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.compositionLocalOf
 import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberUpdatedState
 import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
+import androidx.compose.runtime.snapshotFlow
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
@@ -58,15 +73,20 @@ import androidx.compose.ui.graphics.StrokeJoin
 import androidx.compose.ui.graphics.drawscope.DrawScope
 import androidx.compose.ui.graphics.drawscope.Stroke
 import androidx.compose.ui.graphics.graphicsLayer
+import androidx.compose.ui.semantics.clearAndSetSemantics
 import androidx.compose.ui.semantics.contentDescription
 import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.IntOffset
 import androidx.compose.ui.unit.dp
+import androidx.lifecycle.compose.LocalLifecycleOwner
 import com.ubisam.ubgitea.ui.theme.UBGiteaTheme
 import kotlin.math.PI
+import kotlin.math.abs
 import kotlin.math.sin
 import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.withTimeoutOrNull
 
 // The app's moving parts. All of them draw the launcher icon's tea cup, so the app looks like one
 // thing from the home screen inwards.
@@ -109,14 +129,48 @@ private fun DrawScope.drawTeaCup(color: Color, steam: Float, steamAlpha: Float =
     }
 }
 
+/**
+ * Whether what is composed here can be seen. A tab kept composed beside the one shown is not, and
+ * nothing in it should keep the display redrawing: looping motion rests while this is false.
+ */
+val LocalOnScreen = compositionLocalOf { true }
+
+/** A value going round from [from] to [to] for as long as it can be seen; [from] when it cannot. */
 @Composable
-private fun rememberSteam(): () -> Float {
-    val transition = rememberInfiniteTransition(label = "steam")
-    val steam by transition.animateFloat(0f, 1f, infiniteRepeatable(tween(1600, easing = LinearEasing)), label = "steam")
-    return { steam }
+private fun rememberLoop(
+    from: Float,
+    to: Float,
+    millis: Int,
+    easing: Easing = LinearEasing,
+    repeatMode: RepeatMode = RepeatMode.Restart,
+    label: String,
+): () -> Float {
+    if (!LocalOnScreen.current) return { from }
+    val transition = rememberInfiniteTransition(label = label)
+    val value by transition.animateFloat(from, to, infiniteRepeatable(tween(millis, easing = easing), repeatMode), label = label)
+    return { value }
 }
 
+@Composable
+private fun rememberSteam(): () -> Float = rememberLoop(0f, 1f, 1600, label = "steam")
+
 /** The tea cup with rising steam: the app's "working on it" mark. */
+/**
+ * Holds [content] back for [LoaderDelayMillis] and then fades it in. A wait shorter than that
+ * shows nothing, so a quick load goes straight to what was asked for.
+ */
+@Composable
+fun AfterShortWait(content: @Composable () -> Unit) {
+    val shown = remember { Animatable(0f) }
+    LaunchedEffect(Unit) {
+        delay(LoaderDelayMillis)
+        shown.animateTo(1f, tween(180))
+    }
+    Box(Modifier.graphicsLayer { alpha = shown.value }) { content() }
+}
+
+const val LoaderDelayMillis = 450L
+
 @Composable
 fun TeaCupLoader(modifier: Modifier = Modifier, size: Dp = 48.dp, color: Color = UBGiteaTheme.colors.brand) {
     val steam = rememberSteam()
@@ -129,8 +183,7 @@ fun TeaCupLoader(modifier: Modifier = Modifier, size: Dp = 48.dp, color: Color =
  */
 @Composable
 fun ListSkeleton(modifier: Modifier = Modifier, rows: Int = 6, label: String? = null) {
-    val transition = rememberInfiniteTransition(label = "shimmer")
-    val sweep by transition.animateFloat(-1f, 2f, infiniteRepeatable(tween(1300, easing = LinearEasing)), label = "shimmer")
+    val sweep = rememberLoop(-1f, 2f, 1300, label = "shimmer")
     val base = MaterialTheme.colorScheme.onSurface.copy(alpha = 0.07f)
     val light = MaterialTheme.colorScheme.onSurface.copy(alpha = 0.16f)
     Column(
@@ -146,7 +199,7 @@ fun ListSkeleton(modifier: Modifier = Modifier, rows: Int = 6, label: String? =
                     horizontalArrangement = Arrangement.spacedBy(12.dp),
                     verticalAlignment = Alignment.CenterVertically,
                 ) {
-                    val shimmer = Modifier.drawShimmer(base, light) { sweep }
+                    val shimmer = Modifier.drawShimmer(base, light, sweep)
                     Box(Modifier.size(40.dp).clip(RoundedCornerShape(12.dp)).then(shimmer))
                     Column(Modifier.weight(1f), verticalArrangement = Arrangement.spacedBy(8.dp)) {
                         // Rows differ in length so the block does not read as a table.
@@ -175,13 +228,7 @@ private fun Modifier.drawShimmer(base: Color, light: Color, sweep: () -> Float):
 /** The cup, bobbing a little: sits above the message on a screen that has nothing to list. */
 @Composable
 fun EmptyCup(modifier: Modifier = Modifier) {
-    val transition = rememberInfiniteTransition(label = "empty")
-    val bob by transition.animateFloat(
-        -1f,
-        1f,
-        infiniteRepeatable(tween(1800, easing = FastOutSlowInEasing), RepeatMode.Reverse),
-        label = "bob",
-    )
+    val bob = rememberLoop(-1f, 1f, 1800, FastOutSlowInEasing, RepeatMode.Reverse, label = "bob")
     val steam = rememberSteam()
     val color = UBGiteaTheme.colors.brand.copy(alpha = 0.55f)
     Canvas(
@@ -189,8 +236,8 @@ fun EmptyCup(modifier: Modifier = Modifier) {
             .padding(bottom = 20.dp)
             .size(56.dp, 67.dp)
             .graphicsLayer {
-                translationY = bob * 3.dp.toPx()
-                rotationZ = bob * 2f
+                translationY = bob() * 3.dp.toPx()
+                rotationZ = bob() * 2f
             },
     ) { drawTeaCup(color, steam()) }
 }
@@ -302,6 +349,7 @@ fun <S> TabGlide(
             val glide = tween<IntOffset>(TabGlideMillis, easing = FastOutSlowInEasing)
             slideInHorizontally(glide) { it * direction }
                 .togetherWith(slideOutHorizontally(glide) { -it * direction })
+                .using(NoResize)
         },
         contentKey = tabIndex,
         label = "tab",
@@ -310,16 +358,172 @@ fun <S> TabGlide(
 
 const val TabGlideMillis = 320
 
+/**
+ * For content that changes inside a fixed area. Left to itself, AnimatedContent also animates its
+ * own size from the top left corner whenever the two sides measure differently for a frame, which
+ * turns a sideways move into a diagonal one.
+ */
+val NoResize: SizeTransform = SizeTransform(clip = true) { _, _ -> snap() }
+
+/**
+ * The bottom tabs' screens, laid side by side in the order of [tabs]. Changing [current] glides
+ * to it past whatever lies between, a little longer for each tab passed. Only a tab press moves
+ * it: swiping stays with what is inside the screens.
+ */
+@Composable
+fun <T> TabPager(tabs: List<T>, current: T, modifier: Modifier = Modifier, content: @Composable (T) -> Unit) {
+    val pager = rememberPagerState(initialPage = tabs.indexOf(current)) { tabs.size }
+    LaunchedEffect(current) {
+        val page = tabs.indexOf(current)
+        val passed = abs(page - pager.currentPage)
+        if (passed > 0 || pager.isScrollInProgress) {
+            pager.animateScrollToPage(
+                page,
+                animationSpec = tween(TabGlideMillis + TabGlideStepMillis * (passed - 1).coerceAtLeast(0), easing = FastOutSlowInEasing),
+            )
+        }
+    }
+    // Every tab stays composed, so a glide never waits for a screen to be built. Only the tab
+    // being shown may answer Back: the others are handed a dispatcher nothing presses.
+    val backOwner = LocalOnBackPressedDispatcherOwner.current
+    val noBack = rememberNoBackOwner()
+    // What a page reads about the tab shown, it reads from state: a tab press then recomposes the
+    // two small scopes below and not the screens inside them.
+    val shown = rememberUpdatedState(current)
+    // A pager inside a tab: its pages are on screen only while that tab is.
+    val pagerOnScreen = LocalOnScreen.current
+    HorizontalPager(
+        pager,
+        modifier.fillMaxSize(),
+        beyondViewportPageCount = tabs.size - 1,
+        userScrollEnabled = false,
+        key = { it },
+    ) { page ->
+        val owner = if (tabs[page] == shown.value && backOwner != null) backOwner else noBack
+        val onScreen by remember(page) {
+            derivedStateOf { abs(pager.currentPage + pager.currentPageOffsetFraction - page) < 1f }
+        }
+        CompositionLocalProvider(LocalOnBackPressedDispatcherOwner provides owner, LocalOnScreen provides (pagerOnScreen && onScreen)) {
+            content(tabs[page])
+        }
+    }
+}
+
+const val TabGlideStepMillis = 50
+
+/** A Back dispatcher nothing presses, for screens that are composed but not the one shown. */
+@Composable
+private fun rememberNoBackOwner(): OnBackPressedDispatcherOwner {
+    val lifecycleOwner = LocalLifecycleOwner.current
+    return remember(lifecycleOwner) {
+        object : OnBackPressedDispatcherOwner {
+            override val lifecycle get() = lifecycleOwner.lifecycle
+            override val onBackPressedDispatcher = OnBackPressedDispatcher()
+        }
+    }
+}
+
+/**
+ * [below], and [above] it whatever was opened from it. A screen opened pushes in from the right
+ * as the one behind leaves to the left, and Back reverses that. [direction] says which, when
+ * [above] changes: 1 opened, -1 gone back, 0 neither, which fades in place.
+ *
+ * [below] stays composed while it is covered, off to the left, so Back slides back to it as it
+ * was left and does not wait for it to be built. Covered, it answers no Back and nothing in it
+ * loops.
+ */
+@Composable
+fun <T : Any> PushedOver(
+    above: T?,
+    aboveKey: (T) -> Any,
+    direction: () -> Int,
+    below: (@Composable () -> Unit)?,
+    content: @Composable (T) -> Unit,
+) {
+    Box(Modifier.fillMaxSize()) {
+        val covered = above != null
+        val away by updateTransition(covered, label = "below").animateFloat(
+            transitionSpec = { if (direction() == 0) snap() else tween(ScreenPushMillis, easing = FastOutSlowInEasing) },
+            label = "away",
+        ) { if (it) 1f else 0f }
+        if (below != null) {
+            val onScreen by remember { derivedStateOf { away < 1f } }
+            val backOwner = LocalOnBackPressedDispatcherOwner.current
+            val noBack = rememberNoBackOwner()
+            // It takes the place of what waited for the session: it fades in where it stands.
+            val appear = remember { Animatable(0f) }
+            LaunchedEffect(Unit) { appear.animateTo(1f, tween(200)) }
+            Box(
+                Modifier
+                    .fillMaxSize()
+                    .graphicsLayer {
+                        translationX = -size.width * away
+                        alpha = appear.value
+                    }
+                    .then(if (covered) Modifier.clearAndSetSemantics { } else Modifier),
+            ) {
+                CompositionLocalProvider(
+                    LocalOnBackPressedDispatcherOwner provides (if (covered || backOwner == null) noBack else backOwner),
+                    LocalOnScreen provides onScreen,
+                ) { below() }
+            }
+        }
+        AnimatedContent(
+            targetState = above,
+            modifier = Modifier.fillMaxSize(),
+            transitionSpec = {
+                val towards = direction()
+                if (towards == 0) {
+                    fadeIn(tween(200)).togetherWith(fadeOut(tween(90))).using(NoResize)
+                } else {
+                    val push = tween<IntOffset>(ScreenPushMillis, easing = FastOutSlowInEasing)
+                    slideInHorizontally(push) { it * towards }
+                        .togetherWith(slideOutHorizontally(push) { -it * towards })
+                        .using(NoResize)
+                }
+            },
+            contentKey = { it?.let(aboveKey) },
+            label = "route",
+        ) { shown -> if (shown != null) content(shown) }
+    }
+}
+
+/** How long a screen takes to push in over the one it was opened from, or to leave on Back. */
+const val ScreenPushMillis = 300
+
+/**
+ * [value] as it stood when this screen began to push in, until it has all but arrived. What
+ * loads meanwhile is built in the push's last frames, where the screen moves a few pixels, so
+ * building it neither holds up the push nor leaves the screen standing there still loading.
+ */
+@Composable
+fun <T> heldWhilePushedIn(value: T): T {
+    val first = remember { value }
+    var arrived by remember { mutableStateOf(false) }
+    LaunchedEffect(Unit) {
+        delay(ScreenPushMillis - 40L)
+        arrived = true
+    }
+    return if (arrived) value else first
+}
+
+const val SplashLongestWaitMillis = 1500L
+
 private val SplashGradient = listOf(Color(0xFF4DB0FF), Color(0xFF2F98F9), Color(0xFF0A6FD8))
 
 /**
  * The launcher icon, enlarged and steaming, over the whole window for the first second after a
  * cold start. It covers the app rather than delaying it: everything underneath loads meanwhile.
+ *
+ * It leaves once [settled] says whether there is a session, so its fade does not share frames
+ * with the first screen arriving underneath, and never stays longer than [SplashLongestWaitMillis]
+ * past its own second.
  */
 @Composable
-fun SplashOverlay() {
+fun SplashOverlay(settled: Boolean) {
     var finished by rememberSaveable { mutableStateOf(false) }
     if (finished) return
+    val settledNow by rememberUpdatedState(settled)
     val alpha = remember { Animatable(1f) }
     val scale = remember { Animatable(0.85f) }
     LaunchedEffect(Unit) {
@@ -327,6 +531,11 @@ fun SplashOverlay() {
     }
     LaunchedEffect(Unit) {
         delay(1100)
+        if (!settledNow) {
+            withTimeoutOrNull(SplashLongestWaitMillis) { snapshotFlow { settledNow }.first { it } }
+            // The first screen fades in over the waiting one; let that finish under the cover.
+            delay(250)
+        }
         alpha.animateTo(0f, tween(280))
         finished = true
     }

app/src/main/java/com/ubisam/ubgitea/ui/components/ScrollToTop.kt

@@ -0,0 +1,84 @@
+package com.ubisam.ubgitea.ui.components
+
+import androidx.compose.animation.core.animateFloatAsState
+import androidx.compose.animation.core.tween
+import androidx.compose.foundation.BorderStroke
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.LazyListScope
+import androidx.compose.foundation.lazy.LazyListState
+import androidx.compose.foundation.lazy.rememberLazyListState
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.derivedStateOf
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.graphicsLayer
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.dp
+import com.ubisam.ubgitea.R
+import kotlinx.coroutines.launch
+
+/**
+ * A list that, once it has been scrolled a long way down, offers a small round button in its
+ * bottom corner that takes it back to the top. Takes what a LazyColumn takes.
+ */
+@Composable
+fun ScrollTopLazyColumn(
+    modifier: Modifier = Modifier,
+    state: LazyListState = rememberLazyListState(),
+    contentPadding: PaddingValues = PaddingValues(0.dp),
+    verticalArrangement: Arrangement.Vertical = Arrangement.Top,
+    content: LazyListScope.() -> Unit,
+) {
+    Box(modifier) {
+        LazyColumn(Modifier.fillMaxSize(), state, contentPadding, verticalArrangement = verticalArrangement, content = content)
+        ScrollToTopButton(state, Modifier.align(Alignment.BottomEnd).padding(16.dp))
+    }
+}
+
+@Composable
+private fun ScrollToTopButton(state: LazyListState, modifier: Modifier = Modifier) {
+    val far by remember(state) { derivedStateOf { state.firstVisibleItemIndex >= ScrollTopAfterRows } }
+    val shown by animateFloatAsState(if (far) 1f else 0f, tween(160), label = "top")
+    // Not composed at the top of a list, so it takes no taps and is not read out there.
+    if (shown == 0f) return
+    val scope = rememberCoroutineScope()
+    Surface(
+        onClick = {
+            scope.launch {
+                // From very far down, start near the top: the glide stays short and still reads as one.
+                if (state.firstVisibleItemIndex > ScrollTopGlideRows) state.scrollToItem(ScrollTopGlideRows)
+                state.animateScrollToItem(0)
+            }
+        },
+        enabled = far,
+        shape = CircleShape,
+        color = MaterialTheme.colorScheme.surface,
+        contentColor = MaterialTheme.colorScheme.primary,
+        border = BorderStroke(1.dp, MaterialTheme.colorScheme.outlineVariant),
+        shadowElevation = 3.dp,
+        modifier = modifier.size(40.dp).graphicsLayer {
+            alpha = shown
+            scaleX = 0.8f + 0.2f * shown
+            scaleY = 0.8f + 0.2f * shown
+        },
+    ) {
+        Box(contentAlignment = Alignment.Center) {
+            UBIcon(R.drawable.ic_ub_chevron_up, stringResource(R.string.shell_scroll_to_top), size = 22.dp)
+        }
+    }
+}
+
+private const val ScrollTopAfterRows = 8
+private const val ScrollTopGlideRows = 12

app/src/main/res/values/strings_shell.xml

@@ -12,4 +12,8 @@
     <string name="time_hours_ago">%1$d시간 전</string>
     <string name="time_yesterday">어제</string>
     <string name="time_days_ago">%1$d일 전</string>
+    <string name="shell_exit_title">앱을 종료할까요?</string>
+    <string name="shell_exit_confirm">종료</string>
+    <string name="shell_exit_stay">계속 사용</string>
+    <string name="shell_scroll_to_top">맨 위로</string>
 </resources>

docs/development-log.md

@@ -1615,3 +1615,156 @@ This is the append-only implementation and handoff record shared by Codex and Cl
 - Caution: published without having been seen on a device, at the product owner's decision.
   0.2.3 and older still update through the browser download; the in-app update is first used
   going from 0.2.4 to whatever comes next, so it stays unproven until then.
+
+## 2026-10-12 (continued) — TASK-069: the start no longer stutters as the cup leaves
+
+- Request: the product owner reported that at launch the cup seemed to move off towards the top
+  left as it disappeared, and that this part stuttered.
+- Cause found in the code: until the session is known the route shown is the repository list;
+  once it is known the route becomes Home. Both are tabs, so the change played the full-width tab
+  glide, at about the moment the cover was fading, on top of Home's first composition.
+- What changed: `MainActivity` gives that hand-over a plain fade and no slide. `SplashOverlay`
+  takes `settled` and, after its own 1.1 seconds, waits until the session is known (at most 1.5
+  seconds more) and for the fade underneath before it leaves.
+- Checks and results: the five required checks pass.
+- Caution: diagnosed from the code, not seen on a device. If the stutter is still there, the
+  remaining suspect is the cost of Home's first frames on that phone.
+
+## 2026-10-12 (continued) — TASK-069: bottom tabs pass the tabs between
+
+- Request: going from 홈 to 알림 went straight there; the product owner wants it to glide
+  quickly past 저장소 and 작업.
+- What changed: the four tab screens are pages of one `TabPager` (`Motion.kt`), which a tab
+  press scrolls with 320 ms plus 50 ms per extra tab passed; swiping is off, so gestures inside
+  the screens are unchanged. In `MainActivity` the tab routes share one `AnimatedContent` key,
+  and the two-screen tab glide there is removed. Entering and leaving other screens is as before.
+- Design decision: a tab that is only passed shows whatever its ViewModel last held (its list,
+  or its loading state if never opened); it is not loaded for the pass.
+- Checks and results: the five required checks pass.
+- Caution: not seen on a device.
+
+## 2026-10-12 (continued) — TASK-075: small interaction fixes
+
+- Request: the product owner asked for a border on the selected timeline chip, no tea cup on
+  short loads, a question before leaving from 홈, a button back to the top of long lists, and
+  said that sideways moves looked diagonal (top left to bottom right), also at launch.
+- What changed: `Chips.kt` wraps Material's FilterChip with a selected border and the five
+  screens import it; `CenteredLoading` shows its cup only after 450 ms (`AfterShortWait`);
+  `ExitConfirmDialog` is shown by Back on 홈; `ScrollTopLazyColumn` replaces the LazyColumn of
+  the list screens; `NoResize` is applied to the route transition and to `TabGlide`.
+- Design decision: the diagonal drift is attributed to AnimatedContent's default size animation,
+  which grows from the top left; this was not confirmed on a device before the change. The exit
+  question was designed in code in the app's style, not on the Claude Design canvas first.
+- Agents: chips and the exit dialog were written by implementer (sonnet); the rest by main (opus).
+- Checks and results: the five required checks pass.
+
+## 2026-10-12 (continued) — TASK-069: pushes, steadier repository tabs, tabs kept composed
+
+- Request, from the product owner's device: opening a repository from 활동 중인 저장소 flickered
+  and should push in from the right while it loads; after sliding between the repository tabs
+  something seemed to refresh or realign; tab moves should have no stutter at all.
+- What changed: `MainActivity` opens and closes screens with a full-width push (300 ms) in place
+  of the 90 ms fade. `RepositoryListScreen` remembers what each tab last showed and keeps showing
+  it through Loading, so the account line, the organisation chips and the rows no longer vanish
+  and return on a tab change, refresh or page turn. `TabPager` keeps all four tabs composed
+  (`beyondViewportPageCount`), and gives the tabs not being shown a Back dispatcher nothing
+  presses, so a hidden tab cannot answer Back.
+- Design decision: a remembered list may be a moment out of date (a favourite just starred);
+  the fresh one replaces it in place when it arrives. It is dropped on sign-out.
+- Checks and results: the five required checks pass.
+- Caution: what is installed for these looks is the debug build, which Compose runs noticeably
+  less smoothly than a minified release build; the published APK is the same kind (R8 is on hold
+  under TASK-016). Remaining stutter may be that and not the transitions.
+
+## 2026-10-12 (continued) — TASK-069: the stall at the start of every move
+
+- Request: the product owner asked that the stutter be looked at on their phone directly. It was
+  driven over adb (taps, Back) and measured with `dumpsys gfxinfo framestats` and method
+  sampling (`am profile`), on the debug build, on the 120 Hz cover screen.
+- What was found: every move began with one frame of 45 to 118 ms (5 to 14 frames lost).
+  1. `LocalCodeWorkbench` is a static composition local and its value was built again on every
+     recomposition of the root, which every route change causes. A changed static local turns
+     skipping off beneath it, so all four tab screens were composed again on each move.
+  2. The loading placeholder's light and the empty screen's cup kept animating on the tabs kept
+     composed off screen: the app drew 120 frames a second while nothing moved.
+  3. Changing repository tab built the incoming list of rows in the frame the slide started on.
+  4. A repository's branches replaced the list in place, with no movement, and Back built the
+     whole list again in one frame.
+- What changed: the workbench value is remembered and made again only when its contents change.
+  `LocalOnScreen` tells a page whether it is on screen and the looping animations stop when it
+  is not. `MainActivity` hands the screens remembered callbacks and a remembered screen lambda.
+  The two repository lists sit in a `TabPager`, and so do the list and the branches of the
+  repository opened from it; branches that arrive during the slide wait for it to finish.
+- Measured, first frame of the move, before to after: bottom tabs 80–118 ms to 23–34 ms;
+  repository tab 69–77 ms to 34–52 ms; idle, 120 frames a second to none.
+- Not measured: the branches opening beside the list, and Back from them. The phone's screen was
+  turned off before that run; the change builds and passes the checks but has not been seen.
+  Before it, opening was a cut followed by a 49–59 ms frame when the branches arrived, and Back
+  was a cut with one frame of 69–105 ms.
+- Design decision: the branches screen now slides in like a pushed screen, where it used to
+  replace the list at once. This is a visible change made for smoothness and is the product
+  owner's to keep or reverse.
+- Checks and results: the five required checks pass.
+- Caution: what remains (about 25 to 50 ms on the first frame) is in good part the debug build;
+  a non-debuggable build of the same code measured about a third less. R8 is still on hold
+  under TASK-016.
+
+## 2026-10-12 (continued) — TASK-069: rows keep their lines between repository tabs
+
+- Request: the product owner turned the screen back on for the measurement left open, and
+  reported that going between 전체 저장소 and 즐겨찾기 kept changing the lines of text.
+- Measured, the branches beside the list: opening starts with a frame of 30–42 ms and slides for
+  the full 390 ms, and the rows are built in one 52–64 ms frame after the slide has stopped;
+  Back starts with 13–17 ms and slides without a slow frame (it was a cut with 69–105 ms).
+- What was found: a capture taken 120 ms into the slide showed every row saying
+  "마지막 push 브랜치 확인 중…". Each load of the list began every row at that text and
+  replaced it with the branch chip when the check returned; the chip is taller and, with a long
+  branch name, pushes the date to a line of its own, so each row changed height twice per move.
+- What changed: `RepositoryListViewModel` keeps the branch last found for each repository and a
+  list loaded again starts its rows with it, still checking every row for a newer one. A check
+  that fails leaves a known branch in place. The record is dropped with the session.
+- Measured after: the same capture shows the chips in place during the slide; the repository
+  tab change starts with 35–53 ms and has no frame over 25 ms after it.
+- Checks and results: the five required checks pass.
+
+## 2026-10-12 (continued) — TASK-069: opening from 활동 중인 저장소, and Back from it
+
+- Request: the product owner reported a hitch on pressing a card under 활동 중인 저장소.
+- Measured on their device over adb, before: opening had a frame of 79–95 ms about 220 ms into
+  the 300 ms push, when the file list arrived and its twelve rows were built at once; Back
+  began with a frame of 119–123 ms. The screen transition dropped the tab pager when a screen
+  covered it, so Back built all four tab screens again in its first frame.
+- What changed: `PushedOver` in `Motion.kt` takes the transition's place in `MainActivity`. The
+  tab pager stays composed under a screen opened from it, moved off to the left with the same
+  curve as the push; covered, it answers no Back, is hidden from accessibility and nothing in
+  it loops. `heldWhilePushedIn` gives the branch screen its code and history state as they stood
+  when it began to push in until it has arrived.
+- Measured after: opening has no slow frame between the first (52–72 ms, building the screen)
+  and the end of the push, and the rows are built in one 80–111 ms frame once it stands still;
+  Back begins with 35–66 ms and has no slow frame until it has stopped.
+- Checks and results: the five required checks pass.
+- Caution: the first frame of opening is not shorter; it delays the push's start and does not
+  interrupt it.
+- Follow-up the same day: the product owner, on a release build, found the screen often still
+  loading after it had arrived. The state was held 80 ms past the push and then took a frame
+  to build. It is now released 40 ms before the push ends, where the screen has under 2% of
+  its way left, so the list is there as the screen stops.
+
+## 2026-10-12 (continued) — TASK-076: 0.2.5 published, as the release build
+
+- Request: the product owner asked for the work so far to be published as a new version, and
+  for the release build to be the one published.
+- What changed: version 0.2.5 (versionCode 7) with TASK-069's motion and TASK-075's fixes. The
+  release build type is signed with this PC's debug key, the key every published build has
+  had, so `assembleRelease` gives an APK that installs over them. Source pushed to `main`;
+  `UBGitea.apk` and `version.json` on the `apk` branch replaced.
+- Why the release build: measured on the product owner's device, the same code's first frame
+  of a move was 52–72 ms as the debug build and 21–29 ms as the release build.
+- Checks and results: the five required checks and `assembleRelease` pass; lint 0 errors. The
+  release APK's signing certificate is the debug APK's. Installed over 0.2.4 on the product
+  owner's device as an update, it starts signed in and opens a repository. The APK downloaded
+  from the `apk` branch has the same SHA-256 as the one built here.
+- Caution: R8 is still off (TASK-016) and no baseline profile is included; both were explained
+  to the product owner, who put them off. The in-app update from 0.2.4 is used for the first
+  time by this version and was not watched on a device.
+

tasks/069-in-app-motion.md

@@ -1,6 +1,6 @@
 # TASK-069: In-app motion
 
-Status: implemented; required checks pass; not yet seen on a device
+Status: implemented; required checks pass; being adjusted from the product owner's look on a device
 Owner: Claude
 Reviewer: human product owner
 
@@ -22,6 +22,32 @@ The app moves where it used to jump, and what moves is the launcher icon's tea c
 9. Added after that (product owner, 2026-10-12): the tabs inside a screen glide the same way.
    전체 저장소/즐겨찾기 and 이슈/풀 리퀘스트 keep their header and tab row still while the list under
    them changes sides. The branch screen's tabs already slid (a pager) and are unchanged.
+10. Reported by the product owner (2026-10-12): the start stuttered as the cup left. The first
+    screen was gliding in sideways underneath, as if a tab had been switched, while the cover was
+    fading. The first screen now fades in where it stands, and the cover waits for it (at most
+    1.5 seconds longer) before it leaves.
+11. Asked by the product owner (2026-10-12): going from 홈 to 알림 should pass 저장소 and 작업
+    on the way, quickly, not jump straight there. The four tab screens now sit side by side in a
+    pager that only a tab press moves.
+12. After the product owner's first look on a device (2026-10-12): opening a screen pushes it in
+    from the right, the full width, as the one behind leaves to the left, and Back reverses it;
+    this replaces the short fade of item 5, which read as a flicker. The repository tabs keep
+    showing each tab's last list while it reloads, so nothing settles after the glide. All four
+    bottom tabs stay composed, so a glide does not wait for a screen to be built.
+13. Measured on the product owner's device over adb (2026-10-12), at their request: every tab
+    change, repository tab change, opening and Back began with one frame of 45 to 118 ms on a
+    120 Hz screen. A move now starts without every screen being drawn again; the two repository
+    lists stay built side by side; a repository's branches open beside the list and not in place
+    of it; nothing that loops is drawn while it is off screen.
+14. Reported by the product owner (2026-10-12): going between 전체 저장소 and 즐겨찾기 changed
+    the lines of text in the rows. Each row keeps the branch it was last found to have been
+    pushed to while the list is loaded again, where it went back to "확인 중" and then to the
+    branch, changing the row's height twice.
+15. Reported by the product owner (2026-10-12): pressing a card under 활동 중인 저장소 hitched.
+    Measured: the file list was built in one long frame while the screen was still pushing in,
+    and Back began with a frame of about 120 ms because the four tab screens, dropped when the
+    screen covered them, were all built again. The tab screens now stay as they were under a
+    screen opened from them, and what loads during a push is shown once the screen stands still.
 
 ## Scope
 
@@ -36,6 +62,7 @@ The app moves where it used to jump, and what moves is the launcher icon's tea c
 - `app/src/main/java/com/ubisam/ubgitea/MainActivity.kt`
 - `app/src/main/java/com/ubisam/ubgitea/feature/home/HomeScreen.kt`
 - `app/src/main/java/com/ubisam/ubgitea/feature/repositories/RepositoryListScreen.kt`
+- `app/src/main/java/com/ubisam/ubgitea/feature/repositories/RepositoryListViewModel.kt`
 - `app/src/main/java/com/ubisam/ubgitea/feature/work/WorkScreen.kt`
 - `app/src/main/java/com/ubisam/ubgitea/feature/notifications/NotificationsScreen.kt`
 - `app/src/main/java/com/ubisam/ubgitea/feature/workitems/WorkItemsScreen.kt`
@@ -46,7 +73,7 @@ The app moves where it used to jump, and what moves is the launcher icon's tea c
 
 ## Acceptance criteria
 
-- [x] Each of the nine items above is in the code and the app builds.
+- [x] Each of the fifteen items above is in the code and the app builds.
 - [x] The splash covers the app without delaying it: sign-in, loading and the OAuth callback run
   underneath, and taps do not pass through the cover.
 - [x] Moving between code tabs, or between pages of one screen, does not replay the screen

tasks/070-update-from-gitea.md

@@ -48,7 +48,8 @@ repository being public was the product owner's choice in TASK-067.
 
 ## Publishing a build from now on
 
-1. Raise `versionCode` and `versionName` in `app/build.gradle.kts`, then `assembleDebug`.
+1. Raise `versionCode` and `versionName` in `app/build.gradle.kts`, then `assembleRelease`
+   (the release build since 0.2.5, TASK-076; `assembleDebug` before that).
 2. On the `apk` branch, replace `UBGitea.apk` and set `version.json` to the same version.
 3. Push the `apk` branch.
 

tasks/075-small-interaction-fixes.md

@@ -0,0 +1,60 @@
+# TASK-075: Small interaction fixes from the product owner's first look
+
+Status: implemented; required checks pass; installed on the product owner's device for a look
+Owner: Claude
+Reviewer: human product owner
+
+## Outcome
+
+1. A selected filter chip is outlined in the brand colour, everywhere chips are used.
+2. A short load shows no tea cup: the cup appears only after 450 ms of waiting, so opening a
+   repository from 활동 중인 저장소 goes straight to the code when it loads quickly.
+3. Back on 홈 asks before leaving the app (계속 사용 is the default; 종료 leaves), with the
+   question alone: no explanatory line under it.
+4. A list scrolled a long way down offers a small round button that returns it to the top.
+5. Screens that move sideways no longer drift diagonally: `AnimatedContent` is told not to animate
+   its own size (it does so from the top left corner).
+
+## Scope
+
+- Included: the five items above.
+- Excluded: code, diff and compare panes (they keep their own scrolling); the loading skeletons.
+
+## Writable paths
+
+- `app/src/main/java/com/ubisam/ubgitea/ui/components/Chips.kt`
+- `app/src/main/java/com/ubisam/ubgitea/ui/components/ExitConfirmDialog.kt`
+- `app/src/main/java/com/ubisam/ubgitea/ui/components/ScrollToTop.kt`
+- `app/src/main/java/com/ubisam/ubgitea/ui/components/Motion.kt`
+- `app/src/main/java/com/ubisam/ubgitea/ui/components/Elements.kt`
+- `app/src/main/java/com/ubisam/ubgitea/MainActivity.kt`
+- `app/src/main/java/com/ubisam/ubgitea/feature/**/*Screen.kt`
+- `app/src/main/res/values/strings_shell.xml`
+- `tasks/075-small-interaction-fixes.md`
+- `docs/development-log.md`
+
+## Acceptance criteria
+
+- [x] Each of the five items is in the code and the app builds.
+- [x] Chip call sites are unchanged: only the import differs.
+- [x] The exit question closes on Back or a tap outside, staying in the app.
+- [x] The top button is not composed while a list is near its top.
+- [ ] Seen on the product owner's device.
+
+## Security and privacy
+
+No additional concerns. No network, storage or credential code is touched.
+
+## Required checks
+
+```text
+./gradlew compileDebugKotlin compileDebugUnitTestKotlin testDebugUnitTest assembleDebug lintDebug
+```
+
+## Evidence
+
+See the development log entry for TASK-075.
+
+## Review findings
+
+None yet.

tasks/076-publish-0.2.5.md

@@ -0,0 +1,47 @@
+# TASK-076: Publish 0.2.5 to the team's Gitea, as the release build
+
+Status: done
+Owner: Claude
+Reviewer: human product owner
+
+## Request
+
+The product owner asked for the work so far (TASK-069's motion, TASK-075's small fixes) to be
+published as a new version, and for the release build to be the one published (2026-10-12).
+
+## Writable paths
+
+- `app/build.gradle.kts`
+- `tasks/076-publish-0.2.5.md`
+- `tasks/070-update-from-gitea.md`
+- `docs/development-log.md`
+
+## Acceptance criteria
+
+- [x] Version 0.2.5, versionCode 7.
+- [x] `assembleRelease` gives an installable APK signed with the key the published builds have
+  had, so it installs over them.
+- [x] The source is on `main` of the team's repository.
+- [x] `UBGitea.apk` and `version.json` on the `apk` branch are 0.2.5, and the downloaded APK is
+  byte-identical to the one built here.
+
+## Security and privacy
+
+The APK is now the release build: not debuggable, and the debug-only request logging is off. It
+is still signed with this PC's debug key and still not shrunk (R8 stays on hold under TASK-016).
+No secret is in it or in the push.
+
+## Required checks
+
+```text
+./gradlew compileDebugKotlin compileDebugUnitTestKotlin testDebugUnitTest assembleDebug lintDebug
+./gradlew assembleRelease
+```
+
+## Evidence
+
+See the development log entry for TASK-076.
+
+## Review findings
+
+None.