fix teleport tag and icons (#303)

app/src/main/java/com/bitchat/android/nostr/NostrProtocol.kt

@@ -99,7 +99,8 @@ object NostrProtocol {
         content: String,
         geohash: String,
         senderIdentity: NostrIdentity,
-        nickname: String? = null
+        nickname: String? = null,
+        teleported: Boolean = false
     ): NostrEvent {
         val tags = mutableListOf<List<String>>()
         tags.add(listOf("g", geohash))
@@ -108,6 +109,11 @@ object NostrProtocol {
             tags.add(listOf("n", nickname))
         }
         
+        if (teleported) {
+            // Use tag consistent with event handlers ("t","teleport")
+            tags.add(listOf("t", "teleport"))
+        }
+        
         val event = NostrEvent(
             pubkey = senderIdentity.publicKeyHex,
             createdAt = (System.currentTimeMillis() / 1000).toInt(),