[client/ui-wails] Drop dead freebsd branches in services/connection.go

The file's build constraint excludes freebsd, so the freebsd cases in
IsUnixDesktopClient and OpenURL were unreachable — staticcheck (SA4032)
fails the pre-push lint. Linux is the only Unix-desktop GOOS this
package compiles for, so collapse both checks accordingly.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

client/ui-wails/services/connection.go

@@ -100,7 +100,7 @@ func (s *Connection) Login(ctx context.Context, p LoginParams) (LoginResult, err
 		ManagementUrl:       p.ManagementURL,
 		SetupKey:            p.SetupKey,
 		Hostname:            p.Hostname,
-		IsUnixDesktopClient: runtime.GOOS == "linux" || runtime.GOOS == "freebsd",
+		IsUnixDesktopClient: runtime.GOOS == "linux",
 	}
 	if profileName != "" {
 		req.ProfileName = ptrStr(profileName)
@@ -181,7 +181,7 @@ func (s *Connection) OpenURL(url string) error {
 		return exec.Command("rundll32", "url.dll,FileProtocolHandler", url).Start()
 	case "darwin":
 		return exec.Command("open", url).Start()
-	case "linux", "freebsd":
+	case "linux":
 		return exec.Command("xdg-open", url).Start()
 	default:
 		return fmt.Errorf("unsupported platform")