fix: surface scope_name on live WS channel-message broadcast

The WS packet broadcast (IngestNewFromDB / IngestNewObservations in
cmd/server/store.go) builds its own map independent of the REST
response helpers, so scope_name was missing there even after it was
added to GetChannelMessages and txToMap. Adds it to both broadcast
paths and wires channels.js's live-append handler to read it, so
brand-new messages show their scope immediately instead of waiting
for the next periodic REST refresh.

cmd/server/store.go

@@ -2946,6 +2946,7 @@ func (s *PacketStore) IngestNewFromDB(sinceID, limit int) ([]map[string]interfac
 				"path_json":         strOrNil(obs.PathJSON),
 				"direction":         strOrNil(obs.Direction),
 				"observation_count": tx.ObservationCount,
+				"scope_name":        strOrNil(tx.ScopeName),
 			}
 			// Use decode-window resolved path for broadcast (never from struct)
 			if broadcastRP != nil {
@@ -3218,6 +3219,7 @@ func (s *PacketStore) IngestNewObservations(sinceObsID, limit int) []map[string]
 			"path_json":         strOrNil(obs.PathJSON),
 			"direction":         strOrNil(obs.Direction),
 			"observation_count": tx.ObservationCount,
+			"scope_name":        strOrNil(tx.ScopeName),
 		}
 		// Use decode-window resolved path for broadcast
 		if obsRPMap != nil {

public/channels.js

@@ -1419,6 +1419,7 @@
         var pktId = m.data?.id || null;
         var snr = m.data?.snr ?? m.data?.packet?.snr ?? payload.SNR ?? null;
         var observer = m.data?.packet?.observer_name || m.data?.observer || null;
+        var scope = m.data?.scope_name || m.data?.packet?.scope_name || null;
 
         // Update channel list entry — only once per unique packet hash
         var isFirstObservation = pktHash && !seenHashes.has(pktHash + ':' + channelKey);
@@ -1470,6 +1471,7 @@
               observers: observer ? [observer] : [],
               hops: payload.path_len || 0,
               snr: snr,
+              scope: scope,
               // #1498: mark as WS-pushed so a later REST replacement
               // (selectChannel / refreshMessages) can merge instead of
               // stomp. Without this flag the REST response wipes any