android: debug categories from GUI, fix poll log format, event loop sleeps until traffic

- android_jni_bridge: utun_bridge_set_debug_level actually calls debug_set_level / debug_set_category_level_by_name (was stub)
- SettingsScreen: CATEGORIES updated to match current g_debug_categories from debug_config.c
- ConfigProvider: persist category levels in [debug] section of generated INI config
- u_async: poll() log uses computed timeout_ms instead of confusing %d.%dms format
- u_async: timeout_node char name[16] → const char* name (no truncation, smaller struct)
- memory_pool: pool alloc/free debug logs moved from DEBUG to TRACE
- instance_lite: poll timeout changed from 10ms (100tb) to infinite (-1) — sleeps until traffic
- instance_lite: removed useless heartbeat timer

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

@@ -339,6 +339,13 @@ class ConfigProvider(private val context: Context) {
             appendLine()
             appendLine("[debug]")
             appendLine("console_level=info")
+            val dbgCat = getString("debug.categories") ?: ""
+            if (dbgCat.isNotEmpty()) {
+                for (entry in dbgCat.split(",")) {
+                    val trimmed = entry.trim()
+                    if (trimmed.isNotEmpty()) appendLine(trimmed)
+                }
+            }
             val udpIp = getString("log_udp.ip") ?: ""
             val udpPort = getInt("log_udp.port")
             if (udpIp.isNotEmpty() && udpPort > 0) {

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

@@ -28,10 +28,11 @@ import java.util.UUID
 
 private val LEVELS = listOf("NONE", "ERROR", "WARN", "INFO", "DEBUG", "TRACE")
 private val CATEGORIES = listOf(
-    "UASYNC", "LL_QUEUE", "CONNECTION", "ETCP", "CRYPTO", "MEMORY",
-    "TIMING", "CONFIG", "TUN", "ROUTING", "TIMERS", "NORMALIZER", "BGP",
-    "SOCKET", "CONTROL", "DUMP", "TRAFFIC", "DEBUG", "GENERAL", "NAT",
-    "KEEPALIVE", "ETCPROUTE", "BBR", "ETCP_DUMP", "CONNECTIVITY", "DB_SYNC"
+    "sys", "connection", "etcp", "crypto",
+    "config", "tun", "routing", "timers", "bgp", "chat",
+    "socket", "control", "dump", "traffic", "debug", "general",
+    "nat", "keepalive", "media", "etcp_route", "etcp_dump",
+    "chat_sync", "member_sync", "proxy"
 )
 private val PROTOCOLS = listOf("tcp", "udp")