feat: surface transport scope on channel messages

Adds scope_name to GetChannelMessages (both SQLite and in-memory
store paths) and to the general packet response shape, then renders
it as "Scope: <name>" in the channel chat meta line so operators can
see which region scope a message was transported under.

cmd/server/db.go

@@ -1856,10 +1856,14 @@ func (db *DB) GetChannelMessages(channelHash string, limit, offset int, region .
 		idPlaceholders[i] = "?"
 		obsArgs[i] = id
 	}
+	scopeCol := ""
+	if db.hasScopeName {
+		scopeCol = ", t.scope_name"
+	}
 	var obsSQL string
 	if db.isV3 {
 		obsSQL = `SELECT o.id, t.id, t.hash, t.decoded_json, t.first_seen,
-				obs.id, obs.name, o.snr, o.path_json, o.timestamp
+				obs.id, obs.name, o.snr, o.path_json, o.timestamp` + scopeCol + `
 			FROM observations o
 			JOIN transmissions t ON t.id = o.transmission_id
 			LEFT JOIN observers obs ON obs.rowid = o.observer_idx
@@ -1867,7 +1871,7 @@ func (db *DB) GetChannelMessages(channelHash string, limit, offset int, region .
 			ORDER BY o.id ASC`
 	} else {
 		obsSQL = `SELECT o.id, t.id, t.hash, t.decoded_json, t.first_seen,
-				o.observer_id, o.observer_name, o.snr, o.path_json, o.timestamp
+				o.observer_id, o.observer_name, o.snr, o.path_json, o.timestamp` + scopeCol + `
 			FROM observations o
 			JOIN transmissions t ON t.id = o.transmission_id
 			WHERE t.id IN (` + strings.Join(idPlaceholders, ",") + `)
@@ -1892,7 +1896,12 @@ func (db *DB) GetChannelMessages(channelHash string, limit, offset int, region .
 		var pktHash, dj, fs, obsID, obsName, pathJSON sql.NullString
 		var snr sql.NullFloat64
 		var obsTs sql.NullInt64
-		rows.Scan(&pktID, &txID, &pktHash, &dj, &fs, &obsID, &obsName, &snr, &pathJSON, &obsTs)
+		var scopeName sql.NullString
+		scanArgs := []interface{}{&pktID, &txID, &pktHash, &dj, &fs, &obsID, &obsName, &snr, &pathJSON, &obsTs}
+		if db.hasScopeName {
+			scanArgs = append(scanArgs, &scopeName)
+		}
+		rows.Scan(scanArgs...)
 		if !dj.Valid {
 			continue
 		}
@@ -1943,6 +1952,7 @@ func (db *DB) GetChannelMessages(channelHash string, limit, offset int, region .
 				"observers":        []string{},
 				"hops":             hops,
 				"snr":              nullFloat(snr),
+				"scope":            nullStr(scopeName),
 			},
 			Repeats: 1,
 		}

cmd/server/store.go

@@ -3843,6 +3843,7 @@ func txToMap(tx *StoreTx, includeObservations ...bool) map[string]interface{} {
 		"rssi":              floatPtrOrNil(tx.RSSI),
 		"path_json":         strOrNil(tx.PathJSON),
 		"direction":         strOrNil(tx.Direction),
+		"scope_name":        strOrNil(tx.ScopeName),
 	}
 	// Include parsed path array to match Node.js output shape
 	if hops := txGetParsedPath(tx); len(hops) > 0 {
@@ -5515,6 +5516,7 @@ func (s *PacketStore) GetChannelMessages(channelHash string, limit, offset int,
 					"observers":        observers,
 					"hops":             hops,
 					"snr":              snrVal,
+					"scope":            strOrNil(tx.ScopeName),
 				},
 				Repeats:   1,
 				Observers: observers,

cmd/server/types.go

@@ -905,6 +905,7 @@ type ChannelMessageResp struct {
 	Observers       []string    `json:"observers"`
 	Hops            int         `json:"hops"`
 	SNR             interface{} `json:"snr"`
+	Scope           interface{} `json:"scope"`
 }
 
 type ChannelMessagesResponse struct {

public/channels.js

@@ -663,6 +663,7 @@
           packetHash: c.packet.hash, packetId: c.packet.id,
           hops: d.path_len || 0, snr: c.packet.snr || null,
           observers: c.packet.observer_name ? [c.packet.observer_name] : [],
+          scope: c.packet.scope_name || null,
           repeats: 1
         });
         continue;
@@ -679,6 +680,7 @@
           packetHash: c.packet.hash, packetId: c.packet.id,
           hops: 0, snr: c.packet.snr || null,
           observers: c.packet.observer_name ? [c.packet.observer_name] : [],
+          scope: c.packet.scope_name || null,
           repeats: 1
         });
       } else {
@@ -2258,6 +2260,7 @@
       if (msg.observers?.length > 1) meta.push(`${msg.observers.length} observers`);
       if (msg.hops > 0) meta.push(`${msg.hops} hops`);
       if (msg.snr !== null && msg.snr !== undefined) meta.push(`SNR ${msg.snr}`);
+      if (msg.scope) meta.push(`Scope: ${escapeHtml(msg.scope)}`);
 
       const safeId = btoa(encodeURIComponent(sender));
       // #1367: emit BOTH the new chat-app class names (.ch-message /