fix(marmot): route reply button on MLS messages to the encrypted group

Tapping reply on a Marmot/MLS (kind:445) message in the Notifications
screen previously fell through routeReplyTo()'s `else` branch and opened
the generic public-comment composer (Route.GenericCommentPost). Sending
it would publish a plaintext kind:1111 that references the encrypted
inner event id, leaking that the user has decrypted that group message.

Mirror the NIP-17 pattern (Route.Room carries replyId, draftId,
draftMessage; the same chat screen renders the "replying to" quote
above the input) for MLS:

- routeReplyTo() now detects MarmotGroupChatroom in note.inGatherers,
  matching how routeFor() at line 67 already finds the parent group, and
  returns Route.MarmotGroupChat(groupId, replyId = note.idHex).
- Route.MarmotGroupChat gains message/replyId/draftId fields.
- MarmotGroupChatView resolves the replyId into a Note, shows
  DisplayReplyingToNote above the composer, wires onWantsToReply for
  in-chat replies, and threads the parent inner event through
  AccountViewModel.sendMarmotGroupMessage into
  MarmotManager.buildTextMessage, which now adds a NIP-18 q-tag on the
  inner kind:9 (the same convention ChatEvent.reply() uses).

Push notifications: notifyGroupMessage previously passed
chatroomMembers=null, so the inline Reply action was never attached for
MLS group notifications. Add a parallel MARMOT_REPLY_ACTION wired with
the group id + parent inner event id; NotificationReplyReceiver loads
the account, rebuilds the parent inner event from LocalCache (or sends
unthreaded if the cache was pruned), and publishes the reply through
the same MarmotManager path — so the inline notification reply stays
encrypted inside the group instead of taking the NIP-17 PTag fallback.

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/marmot/MarmotManager.kt

@@ -46,6 +46,8 @@ import com.vitorpamplona.quartz.nip01Core.core.hexToByteArray
 import com.vitorpamplona.quartz.nip01Core.core.toHexKey
 import com.vitorpamplona.quartz.nip01Core.relay.normalizer.NormalizedRelayUrl
 import com.vitorpamplona.quartz.nip01Core.signers.NostrSigner
+import com.vitorpamplona.quartz.nip18Reposts.quotes.QEventTag
+import com.vitorpamplona.quartz.nip18Reposts.quotes.quote
 import com.vitorpamplona.quartz.utils.Log
 import kotlin.io.encoding.Base64
 import kotlin.io.encoding.ExperimentalEncodingApi
@@ -182,11 +184,25 @@ class MarmotManager(
     suspend fun buildTextMessage(
         nostrGroupId: HexKey,
         text: String,
+        replyTo: Event? = null,
         persistOwn: Boolean = true,
     ): TextMessageBundle {
         val template =
             com.vitorpamplona.quartz.nip01Core.signers
-                .eventTemplate<Event>(kind = 9, description = text)
+                .eventTemplate<Event>(kind = 9, description = text) {
+                    if (replyTo != null) {
+                        // Mirror ChatEvent.reply(): NIP-18 q-tag references the
+                        // parent inner kind:9 by id (+ author, no relay hint —
+                        // the inner rumor never hits a relay directly).
+                        quote(
+                            QEventTag(
+                                eventId = replyTo.id,
+                                relayHint = null,
+                                authorPubKeyHex = replyTo.pubKey,
+                            ),
+                        )
+                    }
+                }
         val innerEvent =
             com.vitorpamplona.quartz.nip59Giftwrap.rumors.RumorAssembler
                 .assembleRumor<Event>(signer.pubKey, template)