Prompt users to backup during quick restore.

core/ui/build.gradle.kts

@@ -28,6 +28,8 @@ dependencies {
   api(libs.androidx.compose.material3.adaptive)
   api(libs.androidx.compose.material3.adaptive.layout)
   api(libs.androidx.compose.material3.adaptive.navigation)
+  implementation(libs.androidx.navigation3.ui)
+  implementation(libs.androidx.navigation3.runtime)
   api(libs.androidx.compose.ui.tooling.preview)
   api(libs.androidx.activity.compose)
   debugApi(libs.androidx.compose.ui.tooling.core)

core/ui/src/main/java/org/signal/core/ui/compose/Scaffolds.kt

@@ -5,6 +5,7 @@
 
 package org.signal.core.ui.compose
 
+import androidx.annotation.DrawableRes
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.RowScope
@@ -32,6 +33,49 @@ import org.signal.core.ui.compose.theme.SignalTheme
 @OptIn(ExperimentalMaterial3Api::class)
 object Scaffolds {
 
+  /**
+   * Simple scaffold with a TopAppBar containing a navigation icon and optional title.
+   *
+   * @param onNavigationClick Callback when navigation icon is clicked.
+   * @param navigationIconRes Drawable resource for the navigation icon.
+   * @param navigationContentDescription Content description for the navigation icon.
+   * @param title Optional title text for the app bar.
+   * @param modifier Modifier for the scaffold.
+   * @param content Content to display in the scaffold.
+   */
+  @Composable
+  fun Default(
+    onNavigationClick: () -> Unit,
+    @DrawableRes navigationIconRes: Int,
+    navigationContentDescription: String? = null,
+    title: String? = null,
+    modifier: Modifier = Modifier,
+    content: @Composable (PaddingValues) -> Unit
+  ) {
+    Scaffold(
+      modifier = modifier,
+      topBar = {
+        TopAppBar(
+          title = {
+            if (title != null) {
+              Text(text = title)
+            }
+          },
+          navigationIcon = {
+            IconButton(onClick = onNavigationClick) {
+              Icon(
+                painter = painterResource(navigationIconRes),
+                tint = MaterialTheme.colorScheme.onSurface,
+                contentDescription = navigationContentDescription
+              )
+            }
+          }
+        )
+      },
+      content = content
+    )
+  }
+
   /**
    * Settings scaffold that takes an icon as an ImageVector.
    *

core/ui/src/main/java/org/signal/core/ui/navigation/TransitionSpecs.kt

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2026 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.signal.core.ui.navigation
+
+import androidx.compose.animation.AnimatedContentTransitionScope
+import androidx.compose.animation.ContentTransform
+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.navigation3.runtime.NavKey
+import androidx.navigation3.scene.Scene
+import androidx.navigationevent.NavigationEvent
+
+/**
+ * A collection of [TransitionSpecs] for setting up nav3 navigation.
+ */
+object TransitionSpecs {
+
+  /**
+   * Screens slide in from the right and slide out from the left.
+   */
+  object HorizontalSlide {
+    val transitionSpec: AnimatedContentTransitionScope<Scene<NavKey>>.() -> ContentTransform = {
+      (
+        slideInHorizontally(
+          initialOffsetX = { it },
+          animationSpec = tween(200)
+        ) + fadeIn(animationSpec = tween(200))
+        ) togetherWith
+        (
+          slideOutHorizontally(
+            targetOffsetX = { -it },
+            animationSpec = tween(200)
+          ) + fadeOut(animationSpec = tween(200))
+        )
+    }
+
+    val popTransitionSpec: AnimatedContentTransitionScope<Scene<NavKey>>.() -> ContentTransform = {
+      (
+        slideInHorizontally(
+          initialOffsetX = { -it },
+          animationSpec = tween(200)
+        ) + fadeIn(animationSpec = tween(200))
+        ) togetherWith
+        (
+          slideOutHorizontally(
+            targetOffsetX = { it },
+            animationSpec = tween(200)
+          ) + fadeOut(animationSpec = tween(200))
+        )
+    }
+
+    val predictivePopTransitonSpec:  AnimatedContentTransitionScope<Scene<NavKey>>.(@NavigationEvent.SwipeEdge Int) -> ContentTransform =  {
+      (
+        slideInHorizontally(
+          initialOffsetX = { -it },
+          animationSpec = tween(200)
+        ) + fadeIn(animationSpec = tween(200))
+        ) togetherWith
+        (
+          slideOutHorizontally(
+            targetOffsetX = { it },
+            animationSpec = tween(200)
+          ) + fadeOut(animationSpec = tween(200))
+        )
+    }
+  }
+}