Nostr geohash (#276)

* first nostr build

* add test file

* internet access

* fix relay manager

* fix serialization

* demo service - remove later

* fix nostr

* event dedupe

* dedupe

* ui wip

* can send messages

* subscription works

* works

* favs

* works

* delete chat on change

* fix mentions

* remove autojoin channels

* styling

* adjust colors

* ui changes

* live updates working

* use local timestamp

* message history in background

* robust

* fixes

* nicknames refresh optimization

* nostr service

* refactor nostr

* style

* geohash works

* centralize colors

* refactoring

* disable DMs for now: click on peer nickname doesnt open chat list in geohash mode

* use local time

* less logging

* robustness

* scroll nickname

* adjust some text

app/src/main/java/com/bitchat/android/mesh/BluetoothMeshService.kt

@@ -472,6 +472,18 @@ class BluetoothMeshService(private val context: Context) {
             
             Log.d(TAG, "📨 Sending PM to $recipientPeerID: ${content.take(30)}...")
             
+            // Check if this is a Nostr contact (geohash DM)
+            if (recipientPeerID.startsWith("nostr_")) {
+                // Get NostrGeohashService instance and send via Nostr
+                try {
+                    val nostrGeohashService = com.bitchat.android.nostr.NostrGeohashService.getInstance(context.applicationContext as android.app.Application)
+                    nostrGeohashService.sendNostrGeohashDM(content, recipientPeerID, finalMessageID, myPeerID)
+                } catch (e: Exception) {
+                    Log.e(TAG, "Failed to send Nostr geohash DM: ${e.message}")
+                }
+                return@launch
+            }
+            
             // Check if we have an established Noise session
             if (encryptionService.hasEstablishedSession(recipientPeerID)) {
                 try {
@@ -537,6 +549,18 @@ class BluetoothMeshService(private val context: Context) {
         serviceScope.launch {
             Log.d(TAG, "📖 Sending read receipt for message $messageID to $recipientPeerID")
             
+            // Check if this is a Nostr contact (geohash DM)
+            if (recipientPeerID.startsWith("nostr_")) {
+                // Get NostrGeohashService instance and send read receipt via Nostr
+                try {
+                    val nostrGeohashService = com.bitchat.android.nostr.NostrGeohashService.getInstance(context.applicationContext as android.app.Application)
+                    nostrGeohashService.sendNostrGeohashReadReceipt(messageID, recipientPeerID, myPeerID)
+                } catch (e: Exception) {
+                    Log.e(TAG, "Failed to send Nostr geohash read receipt: ${e.message}")
+                }
+                return@launch
+            }
+            
             try {
                 // Create read receipt payload using NoisePayloadType exactly like iOS
                 val readReceiptPayload = com.bitchat.android.model.NoisePayload(

app/src/main/java/com/bitchat/android/mesh/MessageHandler.kt

@@ -79,12 +79,12 @@ class MessageHandler(private val myPeerID: String) {
                     if (privateMessage != null) {
                         Log.d(TAG, "🔓 Decrypted TLV PM from $peerID: ${privateMessage.content.take(30)}...")
                         
-                        // Create BitchatMessage exactly like iOS
+                        // Create BitchatMessage - use local system time for incoming messages
                         val message = BitchatMessage(
                             id = privateMessage.messageID,
                             sender = delegate?.getPeerNickname(peerID) ?: "Unknown",
                             content = privateMessage.content,
-                            timestamp = java.util.Date(packet.timestamp.toLong()),
+                            timestamp = java.util.Date(), // Use local system time instead of packet timestamp
                             isRelay = false,
                             originalSender = null,
                             isPrivate = true,