Merge pull request #2511 from vitorpamplona/claude/fix-marmot-group-tabs-zLq2N

Implement known/new group classification based on follow set

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

@@ -124,6 +124,7 @@ class AccountFeedContentStates(
         scope.launch(Dispatchers.IO) {
             account.marmotGroupList.groupListChanges.collect {
                 dmKnown.invalidateData()
+                dmNew.invalidateData()
             }
         }
     }

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/marmotGroup/MarmotGroupListScreen.kt

@@ -93,8 +93,12 @@ fun MarmotGroupListScreen(
     // (Account.ensureMarmotKeyPackagePublished), so this screen no longer
     // needs to do anything to make sure invitees can find a KeyPackage.
 
-    val knownGroups = remember(groupList) { groupList.filter { it.second.ownerSentMessage } }
-    val newRequestGroups = remember(groupList) { groupList.filter { !it.second.ownerSentMessage } }
+    val followState by accountViewModel.account.kind3FollowList.flow
+        .collectAsStateWithLifecycle()
+    val followingKeySet = followState.authors
+
+    val knownGroups = remember(groupList, followingKeySet) { groupList.filter { it.second.isKnown(followingKeySet) } }
+    val newRequestGroups = remember(groupList, followingKeySet) { groupList.filter { !it.second.isKnown(followingKeySet) } }
     val visibleGroups = if (selectedTab == 0) knownGroups else newRequestGroups
 
     Scaffold(

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/rooms/dal/ChatroomListKnownFeedFilter.kt

@@ -79,7 +79,11 @@ class ChatroomListKnownFeedFilter(
 
         val marmotGroups =
             account.marmotGroupList.rooms.mapNotNull { _, chatroom ->
-                chatroom.newestMessage ?: chatroom.placeholderNote()
+                if (chatroom.isKnown(followingKeySet)) {
+                    chatroom.newestMessage ?: chatroom.placeholderNote()
+                } else {
+                    null
+                }
             }
 
         return (privateMessages + publicChannels + ephemeralChats + marmotGroups).sortedWith(DefaultFeedOrder)

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/chats/rooms/dal/ChatroomListNewFeedFilter.kt

@@ -47,7 +47,16 @@ class ChatroomListNewFeedFilter(
                 }
             }
 
-        return privateMessages.sortedWith(DefaultFeedOrder)
+        val marmotGroups =
+            account.marmotGroupList.rooms.mapNotNull { _, chatroom ->
+                if (!chatroom.isKnown(followingKeySet)) {
+                    chatroom.newestMessage ?: chatroom.placeholderNote()
+                } else {
+                    null
+                }
+            }
+
+        return (privateMessages + marmotGroups).sortedWith(DefaultFeedOrder)
     }
 
     override fun updateListWith(

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/model/marmotGroups/MarmotGroupChatroom.kt

@@ -69,6 +69,21 @@ class MarmotGroupChatroom(
      */
     var ownerSentMessage: Boolean = false
 
+    /**
+     * Classifies this group for the Known/New Requests split.
+     *
+     * Rules:
+     * - If the local user has already participated ([ownerSentMessage]), Known.
+     * - If the group has no known members and no messages yet, New Requests
+     *   (we don't know who invited us, so it's untrusted by default).
+     * - Otherwise, Known iff at least one admin is in the follow set.
+     */
+    fun isKnown(followingKeySet: Set<HexKey>): Boolean {
+        if (ownerSentMessage) return true
+        if (memberCount.value == 0 && messages.isEmpty()) return false
+        return adminPubkeys.value.any { it in followingKeySet }
+    }
+
     // Synthetic note used by list views to represent the group when no
     // messages have been received yet. Lazily created and kept stable so
     // equality-based feed diffing treats it as the same row across refreshes.