manager: Add default groups when empty

manager/app/src/main/java/me/weishu/kernelsu/ui/component/profile/RootProfileConfig.kt

@@ -164,9 +164,11 @@ fun RootProfileConfig(
             )
         })
 
-        val selectedGroups = profile.groups.mapNotNull { id ->
+        val selectedGroups = profile.groups.ifEmpty { listOf(0) }.let {
+            it.mapNotNull { id ->
                 Groups.values().find { it.gid == id }
             }
+        }
         GroupsPanel(selectedGroups) {
             onProfileChange(
                 profile.copy(