feat: show additional inbound relay count as "(+N)" in message details

Inbound messages now track how many extra nodes relayed a copy to us
(MessageEntity.relays). Surface that on the Relay line of the Message
Details popover as a "(+N)" suffix, e.g. "Relay: NodeName (+2)". The
existing "Relayed by N nodes" line is gated to outbound messages,
matching its original effective behavior and avoiding a redundant
second line for inbound.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: alecperkins

Meshtastic/Views/Messages/MessageContextMenuItems.swift

@@ -89,7 +89,10 @@ struct MessageContextMenuItems: View {
 
 			if let relayDisplay {
 				let prefix = message.realACK ? "Ack Relay: " : "Relay: "
-				Text(prefix + relayDisplay)
+				// For inbound messages, relays counts the additional relayers we overheard beyond the one
+				// named. Surface that as a "(+N)" suffix.
+				let additionalRelays = (!isCurrentUser && message.relays > 0) ? " (+\(message.relays))" : ""
+				Text(prefix + relayDisplay + additionalRelays)
 					.foregroundColor(relayDisplay.contains("Node ") ? .gray : .primary)
 					.font(relayDisplay.contains("Node ") ? .caption : .body)
 			}
@@ -104,7 +107,8 @@ struct MessageContextMenuItems: View {
 					Text("Hops Away \(message.fromUser?.userNode?.hopsAway ?? 0)")
 				}
 			}
-			if message.relays != 0 && message.realACK == false {
+			// Outbound only: how many nodes we heard relay our own (non-realACK) message.
+			if message.relays != 0 && message.realACK == false && isCurrentUser {
 				Text("Relayed by \(message.relays) \(message.relays == 1 ? "node" : "nodes")")
 			}
 			if isCurrentUser && message.receivedACK {

docs/user/messages.md

@@ -114,6 +114,18 @@ The following errors may appear on a message bubble (red unless noted):
 
 ---
 
+## Message Details
+
+Long press any message and open **Message Details** to see delivery and routing information:
+
+- **Relay** — the node that relayed the message. For received messages, a **(+N)** suffix means that N additional nodes were also heard relaying the same message.
+- **SNR / RSSI** — signal quality, shown for direct (0-hop) neighbours.
+- **Hops Away** — hop count for messages received indirectly.
+- **Relayed by N nodes** — for your own broadcast messages, how many nodes were heard rebroadcasting it.
+- **Ack** indicators, error reasons, and timestamps for delivery confirmation.
+
+---
+
 ## Link Appearance
 
 Links in message bubbles — including URLs, Meshtastic channel links, and markdown `[text](url)` links — are styled with an underline and the design standards Link color (Blue 400). This makes links visually distinct from regular message text in both light and dark mode. Tapping a link opens it in the browser, or for Meshtastic channel/contact URLs, opens the appropriate in-app handler.