dms(policy): Restore dms greeter sync in immutable distros

core/cmd/dms/assets/cli-policy.default.json

@@ -3,7 +3,6 @@
   "blocked_commands": [
     "greeter install",
     "greeter enable",
-    "greeter sync",
     "greeter uninstall",
     "setup"
   ],

core/cmd/dms/commands_greeter.go

@@ -51,10 +51,9 @@ var greeterInstallCmd = &cobra.Command{
 }
 
 var greeterSyncCmd = &cobra.Command{
-	Use:     "sync",
-	Short:   "Sync DMS theme and settings with greeter",
-	Long:    "Synchronize your current user's DMS theme, settings, and wallpaper configuration with the login greeter screen",
-	PreRunE: requireMutableSystemCommand,
+	Use:   "sync",
+	Short: "Sync DMS theme and settings with greeter",
+	Long:  "Synchronize your current user's DMS theme, settings, and wallpaper configuration with the login greeter screen",
 	Run: func(cmd *cobra.Command, args []string) {
 		yes, _ := cmd.Flags().GetBool("yes")
 		auth, _ := cmd.Flags().GetBool("auth")

core/cmd/dms/immutable_policy.go

@@ -213,7 +213,7 @@ func getImmutablePolicy() (*immutableCommandPolicy, error) {
 		immutablePolicy = immutableCommandPolicy{
 			ImmutableSystem: detectedImmutable,
 			ImmutableReason: reason,
-			BlockedCommands: []string{"greeter install", "greeter enable", "greeter sync", "setup"},
+			BlockedCommands: []string{"greeter install", "greeter enable", "setup"},
 			Message:         "This command is disabled on immutable/image-based systems. Use your distro-native workflow for system-level changes.",
 		}