member detail: structured display with addresses, connections, BGP summary and socket names

- Extend MEMBER_DETAIL_LINK_SIZE to 63B with 20B sock_name per link
- Replace link_count with links_up/links_down (two uint16) in sock snap
- Add BGP hop list collection via topo_node_best_hop_list, post as CHAT_EVT_BGP_INFO
- Add direct RTT summary text via same event
- Rework AccountList detail panel: header + QTextEdit with monospace layout
- Display protocol (TCP/UDP), socket name line, colored dots for connections
- Show [up/down] link counts for self listen sockets
- Remove * prefix from link count display in Android

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

@@ -269,7 +269,7 @@ private fun MemberDetailCard(
                             Box(Modifier.size(8.dp).clip(CircleShape).background(dot))
                             Spacer(Modifier.width(6.dp))
                             Text(
-                                text = "*[${sk.linksUp}/${sk.linksDown}]  ${sk.protocol}  ${sk.ifName}  ${sk.bindIp}:${sk.port}",
+                                text = "[${sk.linksUp}/${sk.linksDown}]  ${sk.protocol}  ${sk.ifName}  ${sk.bindIp}:${sk.port}",
                                 fontFamily = FontFamily.Monospace,
                                 fontSize = 13.sp,
                                 color = Color.DarkGray

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

@@ -235,7 +235,7 @@ private fun GeneralSettingsTab(vm: ChatViewModel, dirty: Boolean, onDirty: (Bool
                             Text(s.protocol, style = MaterialTheme.typography.labelSmall, color = MaterialTheme.colorScheme.onSurfaceVariant)
                             if (s.linksUp + s.linksDown > 0) {
                                 Spacer(Modifier.width(4.dp))
-                                Text("*[${s.linksUp}/${s.linksDown}]", style = MaterialTheme.typography.labelSmall,
+                                Text("[${s.linksUp}/${s.linksDown}]", style = MaterialTheme.typography.labelSmall,
                                     color = MaterialTheme.colorScheme.onSurfaceVariant)
                             }
                         }