Fix multiple starting bracket formats incorrectly saying waiting for teams from a previous bracket

app/features/tournament-bracket/core/Bracket.ts

@@ -275,6 +275,11 @@ export abstract class Bracket {
 		return;
 	}
 
+	/** Returns true if this bracket is a starting bracket (i.e., teams in it start their tournament from this bracket). Note: there can be more than one starting bracket. */
+	get isStartingBracket() {
+		return !this.sources || this.sources.length === 0;
+	}
+
 	protected standingsWithoutNonParticipants(standings: Standing[]): Standing[] {
 		return standings.map((standing) => {
 			return {

app/features/tournament-bracket/routes/to.$id.brackets.tsx

@@ -205,7 +205,7 @@ export default function TournamentBracketsPage() {
 						{!bracket.canBeStarted ? (
 							<div className="tournament-bracket__mini-alert">
 								⚠️{" "}
-								{bracketIdx === 0
+								{bracket.isStartingBracket
 									? "Tournament start time is in the future"
 									: bracket.startTime && bracket.startTime > new Date()
 										? "Bracket start time is in the future"