feat: Add @Preview annotations to NIP-43 UI components

Adds preview functions for RelayMemberEventCard variants (membership
list, add/remove member, join/leave request) and MembershipActions
states (not member, is member, join sent, leave sent).

https://claude.ai/code/session_01PRqe4bBCb9u62oPh8u9sHx

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/note/types/RelayMembers.kt

@@ -40,12 +40,14 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.model.Note
 import com.vitorpamplona.amethyst.ui.navigation.navs.INav
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.amethyst.ui.theme.ThemeComparisonColumn
 import com.vitorpamplona.quartz.nip43RelayMembers.addMember.RelayAddMemberEvent
 import com.vitorpamplona.quartz.nip43RelayMembers.list.RelayMembershipListEvent
 import com.vitorpamplona.quartz.nip43RelayMembers.removeMember.RelayRemoveMemberEvent
@@ -139,8 +141,8 @@ private fun RelayMemberEventCard(
     icon: ImageVector,
     title: String,
     subtitle: String?,
-    nav: INav,
-    relayPubKey: String?,
+    nav: INav? = null,
+    relayPubKey: String? = null,
 ) {
     Column(
         modifier =
@@ -175,3 +177,63 @@ private fun RelayMemberEventCard(
         }
     }
 }
+
+@Preview
+@Composable
+private fun RelayMembershipListCardPreview() {
+    ThemeComparisonColumn {
+        RelayMemberEventCard(
+            icon = Icons.Default.People,
+            title = "Relay membership list",
+            subtitle = "42 members",
+        )
+    }
+}
+
+@Preview
+@Composable
+private fun RelayAddMemberCardPreview() {
+    ThemeComparisonColumn {
+        RelayMemberEventCard(
+            icon = Icons.Default.PersonAdd,
+            title = "Member added to relay",
+            subtitle = "a1b2c3d4e5f6a7b8...",
+        )
+    }
+}
+
+@Preview
+@Composable
+private fun RelayRemoveMemberCardPreview() {
+    ThemeComparisonColumn {
+        RelayMemberEventCard(
+            icon = Icons.Default.PersonRemove,
+            title = "Member removed from relay",
+            subtitle = "a1b2c3d4e5f6a7b8...",
+        )
+    }
+}
+
+@Preview
+@Composable
+private fun RelayJoinRequestCardPreview() {
+    ThemeComparisonColumn {
+        RelayMemberEventCard(
+            icon = Icons.Default.PersonAdd,
+            title = "Relay join request",
+            subtitle = null,
+        )
+    }
+}
+
+@Preview
+@Composable
+private fun RelayLeaveRequestCardPreview() {
+    ThemeComparisonColumn {
+        RelayMemberEventCard(
+            icon = Icons.AutoMirrored.Filled.ExitToApp,
+            title = "Relay leave request",
+            subtitle = null,
+        )
+    }
+}

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/relays/nip43/RelayMembersScreen.kt

@@ -62,12 +62,14 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextOverflow
+import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.ui.navigation.navs.INav
 import com.vitorpamplona.amethyst.ui.note.UserCompose
 import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
 import com.vitorpamplona.amethyst.ui.stringRes
+import com.vitorpamplona.amethyst.ui.theme.ThemeComparisonColumn
 import com.vitorpamplona.quartz.nip01Core.core.HexKey
 import com.vitorpamplona.quartz.nip01Core.relay.client.reqs.fetchAsFlow
 import com.vitorpamplona.quartz.nip01Core.relay.filters.Filter
@@ -301,6 +303,66 @@ fun MembershipActions(
     }
 }
 
+@Preview
+@Composable
+private fun MembershipActionsNotMemberPreview() {
+    ThemeComparisonColumn {
+        MembershipActions(
+            isMember = false,
+            isLoading = false,
+            joinRequestSent = false,
+            leaveRequestSent = false,
+            onJoinRequest = {},
+            onLeaveRequest = {},
+        )
+    }
+}
+
+@Preview
+@Composable
+private fun MembershipActionsIsMemberPreview() {
+    ThemeComparisonColumn {
+        MembershipActions(
+            isMember = true,
+            isLoading = false,
+            joinRequestSent = false,
+            leaveRequestSent = false,
+            onJoinRequest = {},
+            onLeaveRequest = {},
+        )
+    }
+}
+
+@Preview
+@Composable
+private fun MembershipActionsJoinSentPreview() {
+    ThemeComparisonColumn {
+        MembershipActions(
+            isMember = false,
+            isLoading = false,
+            joinRequestSent = true,
+            leaveRequestSent = false,
+            onJoinRequest = {},
+            onLeaveRequest = {},
+        )
+    }
+}
+
+@Preview
+@Composable
+private fun MembershipActionsLeaveSentPreview() {
+    ThemeComparisonColumn {
+        MembershipActions(
+            isMember = true,
+            isLoading = false,
+            joinRequestSent = false,
+            leaveRequestSent = true,
+            onJoinRequest = {},
+            onLeaveRequest = {},
+        )
+    }
+}
+
 suspend fun sendJoinRequest(
     relay: NormalizedRelayUrl,
     accountViewModel: AccountViewModel,