fix: AirPlay mDNS 发现修复 — MAC地址/公钥/gid

- MAC地址从网络接口获取真实地址 (非全零)
- Ed25519密钥对改为立即初始化 (非lazy) 确保pk在注册前可用
- 添加gid (group UUID) 关联 _airplay 和 _raop 服务
- _airplay 添加 statusFlags TXT 记录

app/src/main/java/com/qwenpaw/miracast/protocol/airplay/AirPlayMdnsService.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import android.net.nsd.NsdManager
 import android.net.nsd.NsdServiceInfo
 import android.util.Log
+import java.net.NetworkInterface
 
 class AirPlayMdnsService(private val context: Context) {
 
@@ -18,10 +19,33 @@ class AirPlayMdnsService(private val context: Context) {
         private const val MODEL = "AppleTV5,3"
         private const val SRCVERS = "220.68"
         private const val PROTOVERS = "1.1"
+
+        fun getMacAddress(): String {
+            try {
+                val interfaces = NetworkInterface.getNetworkInterfaces()
+                while (interfaces.hasMoreElements()) {
+                    val iface = interfaces.nextElement()
+                    val mac = iface.hardwareAddress ?: continue
+                    if (mac.size == 6 && mac[0] != 0.toByte()) {
+                        return mac.joinToString(":") { b -> "%02X".format(b) }
+                    }
+                }
+            } catch (_: Exception) {}
+            val hash = (android.os.Build.SERIAL ?: android.os.Build.MODEL).hashCode()
+            return String.format("%02X:%02X:%02X:%02X:%02X:%02X",
+                (hash shr 24) and 0xFF,
+                (hash shr 16) and 0xFF,
+                (hash shr 8) and 0xFF,
+                hash and 0xFF,
+                ((hash * 31) shr 16) and 0xFF,
+                ((hash * 31) shr 24) and 0xFF
+            )
+        }
     }
 
     @Volatile var deviceName: String = android.os.Build.MODEL
-    @Volatile var macAddress: String = "00:00:00:00:00:00"
+    @Volatile var macAddress: String = getMacAddress()
+    @Volatile var groupId: String = java.util.UUID.randomUUID().toString()
 
     private var nsdManager: NsdManager =
         context.applicationContext.getSystemService(Context.NSD_SERVICE) as NsdManager
@@ -61,11 +85,13 @@ class AirPlayMdnsService(private val context: Context) {
                 setAttribute("model", MODEL)
                 setAttribute("pk", publicKeyHex)
                 setAttribute("pi", java.util.UUID.randomUUID().toString())
+                setAttribute("gid", groupId)
                 setAttribute("srcvers", SRCVERS)
                 setAttribute("vv", "2")
                 setAttribute("protovers", PROTOVERS)
                 setAttribute("manufacturer", "Apple Inc.")
                 setAttribute("osvers", android.os.Build.VERSION.RELEASE)
+                setAttribute("statusFlags", "4")
             }
 
             airplayListener = createListener("AirPlay")
@@ -103,6 +129,7 @@ class AirPlayMdnsService(private val context: Context) {
                 setAttribute("am", MODEL)
                 setAttribute("pk", publicKeyHex)
                 setAttribute("sf", FLAGS)
+                setAttribute("gid", groupId)
                 setAttribute("tp", "UDP")
                 setAttribute("vn", "65537")
                 setAttribute("vs", SRCVERS)

app/src/main/java/com/qwenpaw/miracast/protocol/airplay/AirPlayProtocol.kt

@@ -57,7 +57,7 @@ class AirPlayProtocol(
     private var clientSocket: Socket? = null
     private var scope: CoroutineScope? = null
 
-    private val ed25519KeyPair by lazy { generateEd25519KeyPair() }
+    private val ed25519KeyPair = generateEd25519KeyPair()
     private val sessionId = UUID.randomUUID().toString()
 
     private var pairingState: PairingState = PairingState()