Native call: always ask the core to ring, and ring a DM only once its member has joined

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

features/roomcall/impl/src/main/kotlin/io/element/android/features/roomcall/impl/RoomCallStatePresenter.kt

@@ -61,7 +61,8 @@ class RoomCallStatePresenter(
                         isAudioCall = roomInfo.activeCallIntentConsensus.isAudio(),
                     )
                     else -> {
-                        val isEmptyDm = roomInfo.isDm && roomInfo.activeMembersCount <= 1
+                        // Joined, not active: an invited member cannot be rung (feature-hq 030 R36).
+                        val isEmptyDm = roomInfo.isDm && roomInfo.joinedMembersCount <= 1
                         RoomCallState.StandBy(
                             canStartCall = canJoinCall && !isEmptyDm,
                             isDM = roomInfo.isDm

features/roomcall/impl/src/test/kotlin/io/element/android/features/roomcall/impl/RoomCallStatePresenterTest.kt

@@ -85,6 +85,21 @@ class RoomCallStatePresenterTest {
         }
     }
 
+    @Test
+    fun `present - a DM whose other member is only invited cannot be called`() = runTest {
+        val room = FakeJoinedRoom(
+            baseRoom = FakeBaseRoom(
+                initialRoomInfo = aRoomInfo(isDm = true, activeMembersCount = 2, joinedMembersCount = 1),
+                roomPermissions = roomPermissions(true),
+            )
+        )
+        val presenter = createRoomCallStatePresenter(joinedRoom = room)
+        presenter.test {
+            skipItems(1)
+            assertThat(awaitItem()).isEqualTo(RoomCallState.StandBy(canStartCall = false, isDM = true))
+        }
+    }
+
     @Test
     fun `present - element call not available`() = runTest {
         val room = FakeJoinedRoom(
@@ -128,7 +143,7 @@ class RoomCallStatePresenterTest {
     fun `present - initial state - when is DM room`() = runTest {
         val room = FakeJoinedRoom(
             baseRoom = FakeBaseRoom(
-                initialRoomInfo = aRoomInfo(isDm = true),
+                initialRoomInfo = aRoomInfo(isDm = true, joinedMembersCount = 2),
                 roomPermissions = roomPermissions(true),
             )
         )