fix: address final review findings for provider migration

- Add SessionCoordinator regression test covering switch from an
  authenticated ABox profile to Local experience: remote session is
  logged out and cleared, only Local is the active/observable session,
  credentials are cleared, auto-login disabled, and gateway state stays
  isolated (verified to fail when switch cleanup is removed).
- Replace if/else provider dispatch with exhaustive when over
  ProviderType in all three routing gateways so future enum additions
  fail compilation.
- Silence the known ExperimentalCoroutinesApi opt-in warning in
  ProviderSelectionViewModelTest with a class-level @OptIn.

android/app/src/main/kotlin/com/flagship/abox/manager/di/ProviderRoutingGateways.kt

@@ -71,8 +71,10 @@ internal class RoutingSocketGateway(
         is DomainResult.Success -> delegate(provider.value).setPower(profileId, deviceName, powerState)
     }
 
-    private fun delegate(type: ProviderType): SocketGateway =
+    private fun delegate(type: ProviderType): SocketGateway = when (type) {
-        if (type == ProviderType.ABOX) real else simulation
+        ProviderType.ABOX -> real
+        ProviderType.LOCAL_EXPERIENCE -> simulation
+    }
 }
 
 /** Routes temperature/humidity operations by active provider, mirroring [RoutingSocketGateway]. */
@@ -91,8 +93,10 @@ internal class RoutingTemperatureHumidityGateway(
         is DomainResult.Success -> delegate(provider.value).getReading(profileId, deviceName)
     }
 
-    private fun delegate(type: ProviderType): TemperatureHumidityGateway =
+    private fun delegate(type: ProviderType): TemperatureHumidityGateway = when (type) {
-        if (type == ProviderType.ABOX) real else simulation
+        ProviderType.ABOX -> real
+        ProviderType.LOCAL_EXPERIENCE -> simulation
+    }
 }
 
 /** Routes infrared operations by active provider, mirroring [RoutingSocketGateway]. */
@@ -129,6 +133,8 @@ internal class RoutingInfraredGateway(
         is DomainResult.Success -> delegate(provider.value).downloadCodes(profileId, codes)
     }
 
-    private fun delegate(type: ProviderType): InfraredGateway =
+    private fun delegate(type: ProviderType): InfraredGateway = when (type) {
-        if (type == ProviderType.ABOX) real else simulation
+        ProviderType.ABOX -> real
+        ProviderType.LOCAL_EXPERIENCE -> simulation
+    }
 }

android/app/src/test/kotlin/com/flagship/abox/manager/ui/provider/ProviderSelectionViewModelTest.kt

@@ -7,6 +7,7 @@ import com.flagship.abox.manager.testing.fakes.FakeCredentialStore
 import com.flagship.abox.manager.testing.fakes.FakeLocalSessionGateway
 import com.flagship.abox.manager.testing.fakes.FakeProviderProfileStore
 import com.flagship.abox.manager.testing.fakes.FakeSessionGateway
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.test.advanceUntilIdle
 import kotlinx.coroutines.test.runTest
@@ -14,6 +15,7 @@ import org.junit.Assert.assertEquals
 import org.junit.Rule
 import org.junit.Test
 
+@OptIn(ExperimentalCoroutinesApi::class)
 class ProviderSelectionViewModelTest {
     @get:Rule
     val mainDispatcherRule = MainDispatcherRule()

testing/fakes/src/test/kotlin/com/flagship/abox/manager/testing/fakes/SessionCoordinatorTest.kt

@@ -153,11 +153,47 @@ class SessionCoordinatorTest {
         assertTrue(!fixture.profiles.loginPreferences(remoteProfile.id).autoLoginEnabled)
     }
 
+    @Test
+    fun switchingFromAuthenticatedAboxToLocalClearsRemoteSessionAndIsolatesState() = runTest {
+        val fixture = Fixture()
+        fixture.coordinator.selectProvider(remoteProfile)
+        val loginResult = fixture.coordinator.login(
+            remoteProfile.id,
+            credentials,
+            rememberUsername = true,
+            autoLogin = true,
+        )
+
+        val switchResult = fixture.coordinator.selectProvider(localProfile)
+
+        assertTrue(loginResult is DomainResult.Success)
+        assertTrue(switchResult is DomainResult.Success)
+        assertEquals(
+            localProfile.id,
+            (switchResult as DomainResult.Success).value?.profileId,
+        )
+        assertEquals(localProfile.id, fixture.profiles.activeProfile()?.id)
+        assertEquals(
+            localProfile.id,
+            fixture.coordinator.observeActiveSession().first()?.profileId,
+        )
+        assertNull(fixture.remote.observeSession(remoteProfile.id).first())
+        assertNull(fixture.remote.observeSession(localProfile.id).first())
+        assertEquals(
+            localProfile.id,
+            fixture.local.observeSession(localProfile.id).first()?.profileId,
+        )
+        assertNull(
+            (fixture.credentials.loadCredentials(remoteProfile.id) as DomainResult.Success).value,
+        )
+        assertTrue(!fixture.profiles.loginPreferences(remoteProfile.id).autoLoginEnabled)
+    }
+
     private class Fixture {
         val profiles = FakeProviderProfileStore()
         val credentials = FakeCredentialStore()
         val remote = FakeSessionGateway()
-        private val local = FakeLocalSessionGateway()
+        val local = FakeLocalSessionGateway()
         val coordinator = SessionCoordinator(profiles, credentials, remote, local)
     }