Start with no cars so the first one is added on purpose.

app/src/main/java/com/racingapp/pitlog/data/AppDatabase.kt

@@ -246,19 +246,6 @@ abstract class AppDatabase : RoomDatabase() {
         fun create(context: Context): AppDatabase {
             return Room.databaseBuilder(context, AppDatabase::class.java, "pitlog.db")
                 .addMigrations(MIGRATION_1_2, MIGRATION_2_3, MIGRATION_3_4, MIGRATION_4_5, MIGRATION_5_6, MIGRATION_6_7, MIGRATION_7_8, MIGRATION_8_9)
-                .addCallback(
-                    object : Callback() {
-                        override fun onCreate(db: SupportSQLiteDatabase) {
-                            super.onCreate(db)
-                            db.execSQL(
-                                """
-                                INSERT INTO cars (carName, raceClass, discipline, token, updatedAt, syncRev, deleted, pending)
-                                VALUES ('$DEFAULT_CAR', '$DEFAULT_CLASS', '$DEFAULT_DISCIPLINE', printf('%08d', abs(random()) % 100000000), 1, 0, 0, 1)
-                                """.trimIndent(),
-                            )
-                        }
-                    },
-                )
                 .build()
         }
     }

app/src/main/java/com/racingapp/pitlog/data/RaceDao.kt

@@ -123,6 +123,12 @@ interface RaceDao {
     @Query("SELECT * FROM cars ORDER BY id ASC")
     suspend fun everyCar(): List<Car>
 
+    @Query("SELECT COUNT(*) FROM race_nights WHERE carId = :carId AND deleted = 0")
+    suspend fun nightCount(carId: Long): Int
+
+    @Query("SELECT COUNT(*) FROM setup_sheets WHERE carId = :carId AND deleted = 0")
+    suspend fun sheetCount(carId: Long): Int
+
     @Query("SELECT * FROM cars WHERE deleted = 0 ORDER BY id ASC")
     suspend fun activeCars(): List<Car>
 

app/src/main/java/com/racingapp/pitlog/data/Repository.kt

@@ -10,22 +10,18 @@ import kotlinx.coroutines.flow.flowOf
 import kotlinx.coroutines.flow.map
 
 suspend fun ensureCars(dao: RaceDao, preferences: SyncPreferences) {
-    val cars = dao.everyCar()
-    if (cars.isEmpty()) {
-        val id = dao.insertCar(
-            Car(
-                carName = DEFAULT_CAR,
-                raceClass = DEFAULT_CLASS,
-                discipline = DEFAULT_DISCIPLINE,
-                token = newCarToken(),
-                updatedAt = 1,
-                pending = true,
-            ),
-        )
-        preferences.selectedCarId = id
-        return
-    }
-    for (car in cars) {
+    for (car in dao.everyCar()) {
+        if (car.deleted) continue
+        val untouched = car.updatedAt == 1L &&
+            car.carName == DEFAULT_CAR &&
+            car.raceClass == DEFAULT_CLASS &&
+            car.discipline == DEFAULT_DISCIPLINE &&
+            dao.nightCount(car.id) == 0 &&
+            dao.sheetCount(car.id) == 0
+        if (untouched) {
+            dao.updateCar(car.copy(deleted = true, pending = false))
+            continue
+        }
         if (isEightDigitToken(car.token)) continue
         val source = car.token.ifBlank { preferences.token.trim() }
         val next = if (source.isBlank()) newCarToken() else eightDigitToken(source)
@@ -34,10 +30,14 @@ suspend fun ensureCars(dao: RaceDao, preferences: SyncPreferences) {
         dao.markRunsPending(car.id)
         dao.markSheetsPending(car.id)
     }
-    val first = cars.firstOrNull { !it.deleted } ?: cars.first()
+    val active = dao.activeCars()
+    if (active.isEmpty()) {
+        preferences.selectedCarId = 0
+        return
+    }
     val selected = preferences.selectedCarId
-    if (selected == 0L || cars.none { it.id == selected && !it.deleted }) {
-        preferences.selectedCarId = first.id
+    if (selected == 0L || active.none { it.id == selected }) {
+        preferences.selectedCarId = active.first().id
     }
 }
 

app/src/main/java/com/racingapp/pitlog/ui/home/HomeScreen.kt

@@ -150,8 +150,15 @@ fun HomeScreen(
                     IconButton(onClick = onSettings) {
                         Icon(Icons.Filled.Settings, contentDescription = "Car")
                     }
-                    IconButton(onClick = onNewNight) {
-                        Icon(Icons.Filled.Add, contentDescription = "New race night")
+                    IconButton(
+                        onClick = {
+                            if (state.cars.isEmpty()) viewModel.addCar(onSettings) else onNewNight()
+                        },
+                    ) {
+                        Icon(
+                            Icons.Filled.Add,
+                            contentDescription = if (state.cars.isEmpty()) "Add a car" else "New race night",
+                        )
                     }
                 },
             )
@@ -166,6 +173,9 @@ fun HomeScreen(
                 modifier = Modifier.fillMaxSize(),
                 contentPadding = padding,
             ) {
+                if (state.cars.isEmpty()) {
+                    item { EmptyGarage(onAddCar = { viewModel.addCar(onSettings) }) }
+                } else {
                 item {
                     HomeHeader(
                         profile = state.profile,
@@ -193,6 +203,7 @@ fun HomeScreen(
                         NightCard(night, onClick = { onOpenNight(night.night.id) })
                     }
                 }
+                }
             }
         }
     }
@@ -283,6 +294,29 @@ private fun HomeHeader(
     }
 }
 
+@Composable
+private fun EmptyGarage(onAddCar: () -> Unit) {
+    Column(Modifier.padding(horizontal = 16.dp, vertical = 12.dp)) {
+        Text(
+            "No car yet",
+            style = MaterialTheme.typography.titleLarge,
+        )
+        Text(
+            "Add a car to start a log. Each car gets its own 8-digit token.",
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.padding(top = 8.dp),
+        )
+        Button(
+            onClick = onAddCar,
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(top = 16.dp),
+        ) {
+            Text("Add a car")
+        }
+    }
+}
+
 @Composable
 private fun EmptyNights() {
     Column(Modifier.padding(horizontal = 16.dp, vertical = 12.dp)) {
@@ -366,3 +400,4 @@ private fun CarMark() {
         )
     }
 }
+ 

app/src/main/java/com/racingapp/pitlog/ui/settings/SettingsScreen.kt

@@ -200,7 +200,7 @@ fun SettingsScreen(onBack: () -> Unit) {
             )
         },
         bottomBar = {
-            if (viewModel.ready) {
+            if (viewModel.ready && viewModel.carId != 0L) {
                 PitActionButton(
                     text = if (viewModel.saving) "Saving…" else "Save",
                     onClick = { viewModel.save(onBack) },
@@ -215,6 +215,20 @@ fun SettingsScreen(onBack: () -> Unit) {
             }
         } else {
             PitScroll(padding) {
+                if (viewModel.carId == 0L) {
+                    Text(
+                        "Add a car before you log a night. Pressures are PSI and tire heat is °F.",
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                    OutlinedButton(
+                        onClick = viewModel::addCar,
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .padding(top = 12.dp),
+                    ) {
+                        Text("Add a car")
+                    }
+                } else {
                 Text(
                     "New race nights start with this car. Pressures are PSI and tire heat is °F.",
                     color = MaterialTheme.colorScheme.onSurfaceVariant,
@@ -276,6 +290,7 @@ fun SettingsScreen(onBack: () -> Unit) {
                 ) {
                     Text("Add a car")
                 }
+                }
                 SectionLabel("Add a car from a token")
                 WordsField(
                     label = "Token from another phone",