fix(contacts): relay DM content frames and expose relayToPeer

Accept MESSAGE_*/REACTION/TYPING/PIN on the contacts mesh as a reliability
path when the dedicated DM topic is empty, and export relayToPeer for
platform dual-path gossip.

index.js

@@ -468,6 +468,21 @@ class PearcordContacts extends EventEmitter {
       this.emit('dm-channel', payload)
       return
     }
+    // DM content can ride the contacts mesh when the dedicated DM topic is empty
+    // on one side (asymmetric peer counts / late join). Platform dedupes by message id.
+    if (
+      method === RPC.MESSAGE_CREATE ||
+      method === RPC.MESSAGE_UPDATE ||
+      method === RPC.MESSAGE_DELETE ||
+      method === RPC.REACTION_TOGGLE ||
+      method === RPC.MESSAGE_PIN ||
+      method === RPC.TYPING_START ||
+      method === RPC.CHANNEL_READ
+    ) {
+      if (payload?.guildId && payload.guildId !== 'dm' && payload.guildId != null) return
+      this.emit('dm-relay', { method, payload })
+      return
+    }
     if (method === RPC.CONTACT_REQUEST) {
       this.ingestRequest(payload).catch(() => {})
     } else if (method === RPC.CONTACT_ACCEPT) {
@@ -483,6 +498,16 @@ class PearcordContacts extends EventEmitter {
     }
   }
 
+  /**
+   * Deliver a gossip frame to a specific peer's contacts topic (friend or ephemeral).
+   * Used as a reliability path for 1:1 / group DM when the dedicated DM swarm is empty.
+   */
+  async relayToPeer (peerUserId, method, payload) {
+    if (!peerUserId || method == null) return false
+    await this._gossipToPeer(peerUserId, method, payload)
+    return true
+  }
+
   async simulateGossip (method, payload) {
     if (method === RPC.DM_CHANNEL_UPSERT) {
       this.emit('dm-channel', payload)