fix: upgrade ktlint to 1.7.1 to support stateInUi's context parameters

ktlint 1.4.0 cannot parse the Kotlin 2.x context parameter syntax
(`context(viewModel: ViewModel)`) used by stateInUi, causing
spotlessCheck to fail. Bump ktlint to 1.7.1 (the first version with
context parameter support).

Also fixes incidental issues surfaced by the upgrade and review:
- Apply ktlint 1.7.1's KDoc-spacing rule to NavigationTest.kt.
- Fix import order in InterestsViewModel and SettingsViewModel.
- Remove unused viewModelScope import from MainActivityViewModel.
- Update FlowExtensions.kt copyright year to 2026.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/src/androidTest/kotlin/com/google/samples/apps/nowinandroid/ui/NavigationTest.kt

@@ -110,6 +110,7 @@ class NavigationTest {
     // TODO: implement tests related to navigation & resetting of destinations (b/213307564)
     // Restoring content should be tested with another tab than the For You one, as that will
     // still succeed even when restoring state is turned off.
+
     /**
      * When navigating between the different top level destinations, we should restore the state
      * of previously visited destinations.

app/src/main/kotlin/com/google/samples/apps/nowinandroid/MainActivityViewModel.kt

@@ -17,7 +17,6 @@
 package com.google.samples.apps.nowinandroid
 
 import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
 import com.google.samples.apps.nowinandroid.MainActivityUiState.Loading
 import com.google.samples.apps.nowinandroid.MainActivityUiState.Success
 import com.google.samples.apps.nowinandroid.core.data.repository.UserDataRepository

core/ui/src/main/kotlin/com/google/samples/apps/nowinandroid/core/ui/FlowExtensions.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2024 The Android Open Source Project
+ * Copyright 2026 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

feature/interests/impl/src/main/kotlin/com/google/samples/apps/nowinandroid/feature/interests/impl/InterestsViewModel.kt

@@ -23,8 +23,8 @@ import com.google.samples.apps.nowinandroid.core.data.repository.UserDataReposit
 import com.google.samples.apps.nowinandroid.core.domain.GetFollowableTopicsUseCase
 import com.google.samples.apps.nowinandroid.core.domain.TopicSortField
 import com.google.samples.apps.nowinandroid.core.model.data.FollowableTopic
-import com.google.samples.apps.nowinandroid.feature.interests.api.navigation.InterestsNavKey
 import com.google.samples.apps.nowinandroid.core.ui.stateInUi
+import com.google.samples.apps.nowinandroid.feature.interests.api.navigation.InterestsNavKey
 import dagger.assisted.Assisted
 import dagger.assisted.AssistedFactory
 import dagger.assisted.AssistedInject

feature/settings/impl/src/main/kotlin/com/google/samples/apps/nowinandroid/feature/settings/impl/SettingsViewModel.kt

@@ -21,9 +21,9 @@ import androidx.lifecycle.viewModelScope
 import com.google.samples.apps.nowinandroid.core.data.repository.UserDataRepository
 import com.google.samples.apps.nowinandroid.core.model.data.DarkThemeConfig
 import com.google.samples.apps.nowinandroid.core.model.data.ThemeBrand
+import com.google.samples.apps.nowinandroid.core.ui.stateInUi
 import com.google.samples.apps.nowinandroid.feature.settings.impl.SettingsUiState.Loading
 import com.google.samples.apps.nowinandroid.feature.settings.impl.SettingsUiState.Success
-import com.google.samples.apps.nowinandroid.core.ui.stateInUi
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.map

gradle/libs.versions.toml

@@ -51,7 +51,7 @@ kotlinxCoroutines = "1.10.1"
 kotlinxDatetime = "0.6.1"
 kotlinxSerializationJson = "1.8.0"
 ksp = "2.3.4"
-ktlint = "1.4.0"
+ktlint = "1.7.1"
 okhttp = "4.12.0"
 protobuf = "4.29.2"
 protobufPlugin = "0.9.6"