Fix disk configuration loading for graphical EFI boot order setup

- Improve disk configuration handling for graphical EFI boot order in EMT ISO installs.

- Use configuration.SystemBootType() in updateBootOrder for reliable boot type detection.
- Add fallback in runBootEntryCreationCommand to reload disks from /etc/calamares/unattended_config.json if empty.

Signed-off-by: kinatli jayanth <jayanthx.kintali@intel.com>

Author: Jkintalix

toolkit/tools/liveinstaller/liveinstaller.go

@@ -142,7 +142,8 @@ func installerFactory(forceAttended bool, configFile, templateConfigFile string)
 }
 
 func updateBootOrder(installDetails installationDetails) (err error) {
-	if installDetails.finalConfig.DefaultSystemConfig.BootType != "efi" {
+	bootType := configuration.SystemBootType()
+	if bootType != "efi" {
 		logger.Log.Info("No BootType of 'efi' detected. Not attempting to set EFI boot order.")
 		return
 	}
@@ -177,7 +178,28 @@ func runBootEntryCreationCommand(installDetails installationDetails) (err error)
 			return fmt.Errorf("Kickstart parsed disk list is empty")
 		}
 		cfg.Disks = disks
+	} else {
+		if len(cfg.Disks) == 0 {
+			logger.Log.Info("No disks found in finalConfig, reading from /etc/calamares/unattended_config.json")
+			configFile := "/etc/calamares/unattended_config.json"
+			tempConfig, err := configuration.Load(configFile)
+			if err != nil {
+				logger.Log.Errorf("Failed to reload configuration from %s: %v", configFile, err)
+				return err
+			}
+			if len(tempConfig.Disks) == 0 {
+				logger.Log.Errorf("No disks found in reloaded configuration from %s", configFile)
+				// Log contents for debugging
+				if content, err := os.ReadFile(configFile); err == nil {
+					logger.Log.Debugf("Contents of unattended_config.json: %s", string(content))
+				}
+				return err
+			}
+			// Copy disk contents to cfg.Disks
+			cfg.Disks = tempConfig.Disks
+		}
 	}
+
 	bootPartIdx, bootPart := cfg.GetBootPartition()
 	bootDisk := cfg.GetDiskContainingPartition(bootPart)