Use colon score format and placeholder for upcoming game rows

Game rows now render scores as "2 : 3" (with spaces) in secondary
color so they read as data, not as part of the team-name run.
Pre-game rows show "- : -" in the same slot so tricode columns line
up regardless of whether the game has started — only two-digit scores
push the layout, which doesn't happen in NHL play.

IceGlass-iOS/Views/GameRow.swift

@@ -47,19 +47,13 @@ struct GameRow: View {
                 .lineLimit(1)
                 .fixedSize()
 
-            if showScore {
-                Text(scoreText)
+            Text(showScore ? scoreText : "- : -")
                 .font(.title3.monospacedDigit())
                 .fontWeight(.bold)
-                    .foregroundStyle(.primary)
+                .foregroundStyle(.secondary)
                 .lineLimit(1)
                 .fixedSize()
                 .padding(.horizontal, 2)
-            } else {
-                Text("@")
-                    .font(.title3)
-                    .foregroundStyle(.tertiary)
-            }
 
             Text(game.homeTeam.abbrev)
                 .font(.title3.monospaced())
@@ -108,7 +102,7 @@ struct GameRow: View {
     private var scoreText: String {
         let a = game.awayTeam.score ?? 0
         let h = game.homeTeam.score ?? 0
-        return "\(a)–\(h)"
+        return "\(a) : \(h)"
     }
 
     private func open() {