Nip17 dms to extend the mesh (#313)

* favorite each other

* show favorites as system messsages

* wip show glove when offline but mayb edoesnt work

* send and receive works

* wip kinda works but no

* getting there

* kinda

* show offline peers in peer list

* kinda wonky but almost works

* fixes

* nostr user goes offline works

* nostr -> mesh works

* handoff works

* background message processing

* read works

* seen message store was missing

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

@@ -70,7 +70,7 @@ object NostrProtocol {
                     return null
                 }
             
-            Log.v(TAG, "Successfully unwrapped gift wrap")
+            Log.v(TAG, "Successfully unwrapped gift wrap from: ${seal.pubkey.take(16)}...")
             
             // 2. Open the seal
             val rumor = openSeal(seal, recipientIdentity.privateKeyHex)