Name the Mac in the Server tab's headings

mac/Sources/Byre/API.swift

@@ -96,6 +96,7 @@ func errorText(_ error: any Error) -> String {
 }
 
 private let clientID = UUID().uuidString
+let macName = Host.current().localizedName ?? ProcessInfo.processInfo.hostName
 
 final class API: Sendable {
     let origin: URL
@@ -108,7 +109,7 @@ final class API: Sendable {
         config.httpAdditionalHeaders = [
             "Byre-Client": clientID,
             "Byre-Commit": Bundle.main.object(forInfoDictionaryKey: "ByreCommit") as! String,
-            "Byre-Host": Host.current().localizedName ?? ProcessInfo.processInfo.hostName,
+            "Byre-Host": macName,
         ]
         session = URLSession(configuration: config)
         client = Client(