Moves EmptyNostrClient to a class to avoid auto-import issues

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/AccountViewModel.kt

@@ -1791,7 +1791,7 @@ fun mockAccountViewModel(): AccountViewModel {
             forceReplacePubkey = false,
         )
 
-    val client = EmptyNostrClient
+    val client = EmptyNostrClient()
     val authenticator = EmptyIAuthStatus
 
     val nwcFilters = NWCPaymentFilterAssembler(client)
@@ -1842,7 +1842,7 @@ fun mockVitorAccountViewModel(): AccountViewModel {
             pubKey = Hex.decode("460c25e682fda7832b52d1f22d3d22b3176d972f60dcdc3212ed8c92ef85065c"),
         )
 
-    val client = EmptyNostrClient
+    val client = EmptyNostrClient()
     val authenticator = EmptyIAuthStatus
 
     val nwcFilters = NWCPaymentFilterAssembler(client)
@@ -1856,7 +1856,7 @@ fun mockVitorAccountViewModel(): AccountViewModel {
             nwcFilterAssembler = nwcFilters,
             otsResolverBuilder = EmptyOtsResolverBuilder,
             cache = LocalCache,
-            client = EmptyNostrClient,
+            client = EmptyNostrClient(),
             scope = scope,
         )
 

desktopApp/src/jvmTest/kotlin/com/vitorpamplona/amethyst/desktop/account/AccountManagerHeartbeatTest.kt

@@ -61,7 +61,7 @@ class AccountManagerHeartbeatTest {
                 NostrSignerRemote.fromBunkerUri(
                     "bunker://$validHex?relay=wss://r.com",
                     ephemeral,
-                    EmptyNostrClient,
+                    EmptyNostrClient(),
                 ),
             )
     }

docs/plans/2026-03-05-nip46-tdd-tests-plan.md

@@ -25,7 +25,7 @@ Write tests that **reproduce the three NIP-46 bugs** before they're fixed, then
 ### Existing
 - Framework: `kotlin.test` + `kotlinx-coroutines-test` + `mockk`
 - Location: `desktopApp/src/jvmTest/kotlin/.../desktop/account/`
-- Mocks: `EmptyNostrClient` (no-op), `mockk<SecureKeyStorage>(relaxed = true)`, temp dirs
+- Mocks: `EmptyNostrClient()` (no-op), `mockk<SecureKeyStorage>(relaxed = true)`, temp dirs
 - Pattern: `@BeforeTest` setup → `runTest {}` → `@AfterTest` cleanup
 
 ### Needed
@@ -40,9 +40,9 @@ Three tests pass `client` param to `loadSavedAccount()` which no longer accepts
 
 | Test | Fix |
 |------|-----|
-| `loadSavedAccountBunkerNoEphemeralReturnsFailure` (line 114) | Remove `client = EmptyNostrClient` arg |
+| `loadSavedAccountBunkerNoEphemeralReturnsFailure` (line 114) | Remove `client = EmptyNostrClient()` arg |
 | `loadSavedAccountBunkerNoClientFallsBackToInternal` (line 119-136) | **Delete entirely** — concept no longer exists (AccountManager always creates its own NIP-46 client) |
-| `loadSavedAccountBunkerSuccess` (line 155-158) | Remove `client = EmptyNostrClient` arg |
+| `loadSavedAccountBunkerSuccess` (line 155-158) | Remove `client = EmptyNostrClient()` arg |
 
 ## Phase 1: Relay Isolation Tests (Bug 2 + 3)
 

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip01Core/relay/client/INostrClient.kt

@@ -87,7 +87,7 @@ interface INostrClient : AutoCloseable {
     fun activeOutboxCache(url: NormalizedRelayUrl): Set<HexKey>
 }
 
-object EmptyNostrClient : INostrClient {
+class EmptyNostrClient : INostrClient {
     override fun connectedRelaysFlow() = MutableStateFlow(emptySet<NormalizedRelayUrl>())
 
     override fun availableRelaysFlow() = MutableStateFlow(emptySet<NormalizedRelayUrl>())

quartz/src/commonMain/kotlin/com/vitorpamplona/quartz/nip01Core/relay/client/accessories/NostrClientReqBypassingRelayLimitsExt.kt

@@ -21,8 +21,6 @@
 package com.vitorpamplona.quartz.nip01Core.relay.client.accessories
 
 import com.vitorpamplona.quartz.nip01Core.core.Event
-import com.vitorpamplona.quartz.nip01Core.relay.client.EmptyNostrClient.close
-import com.vitorpamplona.quartz.nip01Core.relay.client.EmptyNostrClient.openReqSubscription
 import com.vitorpamplona.quartz.nip01Core.relay.client.INostrClient
 import com.vitorpamplona.quartz.nip01Core.relay.client.reqs.IRequestListener
 import com.vitorpamplona.quartz.nip01Core.relay.client.single.newSubId

quartz/src/commonTest/kotlin/com/vitorpamplona/quartz/nip46RemoteSigner/signer/ConvertExceptionsTest.kt

@@ -34,7 +34,7 @@ class ConvertExceptionsTest {
         NostrSignerRemote.fromBunkerUri(
             "bunker://${"a".repeat(64)}?relay=wss://r.com",
             NostrSignerInternal(KeyPair()),
-            EmptyNostrClient,
+            EmptyNostrClient(),
         )
 
     @Test

quartz/src/commonTest/kotlin/com/vitorpamplona/quartz/nip46RemoteSigner/signer/FromBunkerUriTest.kt

@@ -30,7 +30,7 @@ import kotlin.test.assertNull
 
 class FromBunkerUriTest {
     private val signer = NostrSignerInternal(KeyPair())
-    private val client = EmptyNostrClient
+    private val client = EmptyNostrClient()
     private val validHex = "a".repeat(64)
 
     @Test