feat(body_mesh): Add edge UV data for facial and hair mesh components

- Add edge UV coordinate data for N00_000_00_FaceEyelash_00_FACE mesh instance with 112 edges
- Add edge UV coordinate data for N00_000_00_HairBack_00_HAIR mesh instance with 800 edges
- Update body_mesh module initialization and operations to support new mesh data
- Enhance panel UI and utility functions for mesh edge UV handling
- Add comprehensive UV matching test suite for validation
- Update registration module to include new mesh components
- Improve test utilities for edge UV data verification

editor/body_mesh/panel.py

@@ -7,8 +7,9 @@ from bpy.types import Context, Panel
 from .utils import (
     MaterialInfo,
     find_body_mesh,
+    find_face_mesh,
     get_material_face_count,
-    is_skin_material,
+    is_retained_material,
 )
 
 if TYPE_CHECKING:
@@ -69,45 +70,64 @@ class VRM_PT_body_mesh_separator(Panel):
             layout.label(text="Body网格数据无效", icon="ERROR")
             return
 
-        # 显示材质统计信息
+        # 显示材质统计信息（区分保留材质和可分离材质）
         box = layout.box()
         box.label(text="材质列表", icon="MATERIAL")
 
-        # 收集材质信息
+        # 收集材质信息，使用is_retained_material和is_separable_material分类
         materials_info: list[MaterialInfo] = []
         for i, material in enumerate(mesh_data.materials):
             if material is not None:
                 face_count = get_material_face_count(mesh_data, i)
-                is_skin = is_skin_material(material.name)
+                is_retained = is_retained_material(material.name)
                 materials_info.append(
                     MaterialInfo(
                         name=material.name,
                         index=i,
                         face_count=face_count,
-                        is_skin=is_skin,
+                        is_skin=is_retained,  # 使用is_skin字段存储保留状态
                     )
                 )
 
-        # 显示材质列表
-        has_non_skin = False
+        # 显示材质列表，区分保留材质（SKIN/HAIR）和可分离材质（CLOTH和其他）
+        has_separable = False
         for mat_info in materials_info:
             row = box.row()
-            if mat_info.is_skin:
-                row.label(text=f"[皮肤] {mat_info.name}", icon="CHECKMARK")
+            if mat_info.is_skin:  # is_skin字段现在表示是否为保留材质
+                # 保留材质（SKIN/HAIR）标记为"[保留]"
+                row.label(text=f"[保留] {mat_info.name}", icon="CHECKMARK")
             else:
-                row.label(text=f"[非皮肤] {mat_info.name}", icon="MESH_DATA")
-                has_non_skin = True
+                # 可分离材质（CLOTH和其他）标记为"[分离]"
+                row.label(text=f"[分离] {mat_info.name}", icon="MESH_DATA")
+                has_separable = True
             row.label(text=f"{mat_info.face_count} 面")
 
         # 显示分离操作按钮
         layout.separator()
         col = layout.column()
-        col.enabled = has_non_skin
+        col.enabled = has_separable
         col.operator(
             "vrm.separate_non_skin_faces",
             text="分离非皮肤面",
             icon="MESH_DATA",
         )
 
-        if not has_non_skin:
-            layout.label(text="没有非皮肤材质可分离", icon="INFO")
+        if not has_separable:
+            layout.label(text="没有可分离材质", icon="INFO")
+
+        # 显示UV边融并按钮 (Requirements 1.2, 1.3)
+        layout.separator()
+        armature = self._get_armature(context)
+        face_mesh = find_face_mesh(armature) if armature else None
+        has_vrm_structure = body_mesh is not None and face_mesh is not None
+
+        col = layout.column()
+        col.enabled = has_vrm_structure
+        col.operator(
+            "vrm.merge_uv_edges",
+            text="根据UV转四边面",
+            icon="MOD_EDGESPLIT",
+        )
+
+        if not has_vrm_structure:
+            layout.label(text="需要Body和Face网格", icon="INFO")