topo_group_connect: infinite reconnect cycle + connecting status for GUI

- dedup double ETCP_CONN_STATUS_UP (UDP+TCP links) in topo_group_new_conn
- close conn_mgr handle on TIMEOUT in Phase2/3 (fix stuck 'already connecting')
- infinite Phase1→2→3 cycle with pause (1s active / 30s standby)
- CHAT_EVT_CONNECTING_NODES: yellow circle in member list while connecting
- Android: client_activity wiring via onStart/onStop + nativeSetActive
- function-level comments in topo_group_connect.c

tools/chatgui-android/app/src/main/java/com/utun/chat/MainActivity.kt

@@ -146,4 +146,14 @@ class MainActivity : ComponentActivity() {
             }
         }
     }
+
+    override fun onStart() {
+        super.onStart()
+        if (NativeLib.isReady()) NativeLib.setActive(true)
+    }
+
+    override fun onStop() {
+        super.onStop()
+        if (NativeLib.isReady()) NativeLib.setActive(false)
+    }
 }

tools/chatgui-android/app/src/main/java/com/utun/chat/data/ChatRepository.kt

@@ -68,7 +68,7 @@ data class ChatMember(val nodeId: Long, val name: String, val online: Boolean =
                       val directUp: Boolean = false, val indirectUp: Boolean = false,
                       val directPresence: Boolean = false, val indirectPresence: Boolean = false,
                       val bgpPresence: Boolean = false, val bgpRtt: Int = 0,
-                      val bgpNodes: Int = 0) {
+                      val bgpNodes: Int = 0, val connecting: Boolean = false) {
     val flags: Int get() = (if (isSuper) 1 else 0) or (if (isAdmin) 2 else 0) or (if (isModer) 4 else 0)
 }
 

tools/chatgui-android/app/src/main/java/com/utun/chat/data/NativeLib.kt

@@ -53,6 +53,9 @@ object NativeLib {
     fun ping() { nativePing() }
     fun isResponsive(): Boolean = nativeIsResponsive()
 
+    /* ── App foreground/background (Android lifecycle) ── */
+    fun setActive(active: Boolean) { nativeSetActive(active) }
+
     fun sendMessage(channelId: String, text: String) { nativeSendMessage(channelId, text) }
     fun createChannel(name: String, channelId: String) { nativeCreateChannel(name, channelId) }
     fun connectNode(address: String, port: Int, pubkeyHex: String) { nativeConnectNode(address, port, pubkeyHex) }
@@ -140,6 +143,7 @@ object NativeLib {
     private external fun nativePing()
     private external fun nativeIsResponsive(): Boolean
     private external fun nativeIsRunning(): Boolean
+    private external fun nativeSetActive(active: Boolean)
 
     /* ── Channel members JNI ── */
     private external fun nativeGetChannelMembers(channelId: String): String?

tools/chatgui-android/app/src/main/java/com/utun/chat/ui/screens/MemberListScreen.kt

@@ -122,11 +122,13 @@ private fun MemberListItem(
     onEdit: () -> Unit
 ) {
     val onlineColor = when {
+        member.connecting -> Color(0xFFFFEB3B)  // yellow: connecting
         member.directUp || member.indirectUp -> Color(0xFF4CAF50)  // green: up
         member.directPresence || member.indirectPresence || member.bgpPresence -> Color(0xFFFFA726)  // orange: presence but down
         else -> Color(0xFF9E9E9E)  // gray: offline
     }
     val connLabel = when {
+        member.connecting -> "connecting"
         member.directUp -> "direct"
         member.indirectUp -> "indirect"
         member.directPresence || member.indirectPresence || member.bgpPresence -> "offline"
@@ -171,6 +173,7 @@ private fun MemberListItem(
                 if (member.isSuper) parts.add("Super")
                 if (member.isStorage) parts.add("Storage")
                 if (member.isSelf) parts.add("self")
+                else if (member.connecting) parts.add("connecting…")
                 else if (member.directUp) parts.add("direct↑")
                 else if (member.indirectUp) parts.add("indirect↑")
                 else if (member.directPresence || member.indirectPresence || member.bgpPresence) parts.add("down")

tools/chatgui-android/app/src/main/java/com/utun/chat/viewmodel/ChatViewModel.kt

@@ -65,6 +65,9 @@ class ChatViewModel : ViewModel() {
     private val _nodeStatuses = MutableStateFlow<Map<Long, NodeStatus>>(emptyMap())
     val nodeStatuses: StateFlow<Map<Long, NodeStatus>> = _nodeStatuses
 
+    private val _connecting = MutableStateFlow<Map<String, Set<Long>>>(emptyMap())
+    val connecting: StateFlow<Map<String, Set<Long>>> = _connecting
+
     private val _localSockets = MutableStateFlow<List<LocalSocketState>>(emptyList())
     val localSockets: StateFlow<List<LocalSocketState>> = _localSockets
 
@@ -281,6 +284,24 @@ class ChatViewModel : ViewModel() {
                     _selectedMember.value = _selectedMember.value?.copy(online = ml.connected && ml.linksUp > 0)
                 }
             }
+            27 -> { /* CONNECTING_NODES: [ch_id_len:1][ch_id:var][count:2][node_id:8]* */
+                if (data == null || data.size < 3) return
+                val cl = data[0].toInt() and 0xFF
+                if (data.size < 1 + cl + 2) return
+                val chId = String(data, 1, cl)
+                val buf = java.nio.ByteBuffer.wrap(data, 1 + cl, data.size - 1 - cl).order(java.nio.ByteOrder.LITTLE_ENDIAN)
+                val count = buf.getShort().toInt() and 0xFFFF
+                val set = HashSet<Long>()
+                for (i in 0 until count) {
+                    if (buf.position() + 8 > data.size) break
+                    set.add(buf.getLong())
+                }
+                _connecting.value = _connecting.value + (chId to set)
+                val cur = _currentChannel.value
+                if (cur != null && cur.id == chId) {
+                    _members.value = _members.value.map { it.copy(connecting = it.nodeId in set) }
+                }
+            }
         }
     }
 
@@ -324,17 +345,19 @@ class ChatViewModel : ViewModel() {
     fun refreshMembers(chId: String) {
         val r = repo ?: return
         val statuses = _nodeStatuses.value
+        val connecting = _connecting.value[chId] ?: emptySet()
         viewModelScope.launch {
             val raw = withContext(Dispatchers.IO) { r.getMembers(chId) }
             _members.value = raw.map { m ->
                 val ns = statuses[m.nodeId]
-                if (ns != null) m.copy(
+                val base = if (ns != null) m.copy(
                     online = ns.online, rtt = ns.bestRtt,
                     directUp = ns.directUp, indirectUp = ns.indirectUp,
                     directPresence = ns.directPresence, indirectPresence = ns.indirectPresence,
                     bgpPresence = ns.bgpPresence, bgpRtt = ns.bgpRtt,
                     bgpNodes = ns.bgpNodes
                 ) else m
+                base.copy(connecting = base.nodeId in connecting)
             }
         }
     }