Armature Re-strutring and etc

resources/translations/en_US.json

@@ -616,6 +616,7 @@
     "MMD.translate_materials": "Materials",
     "MMD.translate_shapekeys": "Shape Keys",
     "MMD.translate_objects": "Objects",
+    "MMD.restructure_bones": "Restructure to Unity Format",
     "MMD.translation_options": "Translation Options:",
     "MMD.convert_armature_button": "Convert MMD Armature",
     "MMD.convert_armature.label": "Convert MMD Armature",
@@ -623,6 +624,7 @@
     "MMD.conversion_info.title": "Conversion Info:",
     "MMD.conversion_info.removes_parent": "• Removes parent Empty object",
     "MMD.conversion_info.renames_armature": "• Renames armature to 'Armature'",
+    "MMD.conversion_info.restructures_bones": "• Converts to Unity bone structure (Hips/Spine/Chest)",
     "MMD.conversion_info.maintains_hierarchy": "• Maintains object hierarchy",
     "MMD.conversion_info.translates_names": "• Translates Japanese names to English",
     "MMD.detection_failed.title": "MMD Detection Failed:",
@@ -650,6 +652,11 @@
     "MMD.objects_translated": "Translated {count} objects",
     "MMD.objects_failed": "Failed to translate {count} objects",
     "MMD.translation_complete": "Translation complete: {total} items translated",
+    "MMD.restructure_starting": "Restructuring bones to Unity format...",
+    "MMD.bones_restructured": "Restructured {count} bones to Unity format",
+    "MMD.bones_removed": "Removed {count} unnecessary bones",
+    "MMD.bones_reparented": "Reparented {count} bones",
+    "MMD.restructure_failed": "Bone restructuring failed: {error}",
 
     "Translation.label": "Translation",
     "Translation.service": "Translation Service",