feat(importing): Add pupil control bone tail positions and refine bone cleanup logic

- Add tail position definitions for left and right pupil control bones (cf_J_hitomi_tx_L and cf_J_hitomi_tx_R) with Z-axis offset of 0.01
- Remove IK control bones (cf_pv_*) from must_keep_bones list for C model armature cleanup, as these are not needed in subsequent KKBP steps
- Update must_keep_bones comments to clarify that IK control bones are intentionally excluded during C model processing
- Improve logging message to explicitly indicate that deleted accessory bones include IK control bones
- Add inline comments to pupil control bones in must_keep_bones list for better code documentation

importing/modifyarmature.py

@@ -258,6 +258,7 @@ better_fbx_bone_tails = {
     'cf_J_Eye06_s_L': (0.0179830194, -0.0083362609, -0.0178645924),
     'cf_J_Eye07_s_L': (0.0006974302, -0.0135568678, -0.0231180415),
     'cf_J_Eye08_s_L': (-0.0155729428, -0.0184436664, -0.0195927024),
+    'cf_J_hitomi_tx_L': (0.0, 0.0, 0.01),  # 左眼瞳控制骨骼
     'cf_J_Eye_txdam_R': (-0.0005300008, -0.0006456077, 0.0108191594),
     'cf_J_Eye_tx_R': (-0.0005300008, -0.0006456077, 0.0108191594),
     'cf_J_Eye_rz_R': (-0.0018717796, -0.0143385679, -0.007591337),
@@ -270,6 +271,7 @@ better_fbx_bone_tails = {
     'cf_J_Eye06_s_R': (-0.0179587901, -0.0083584338, -0.0178358555),
     'cf_J_Eye07_s_R': (-0.0006720722, -0.0135397911, -0.0230915993),
     'cf_J_Eye08_s_R': (0.0155643187, -0.018403694, -0.0196200199),
+    'cf_J_hitomi_tx_R': (0.0, 0.0, 0.01),  # 右眼瞳控制骨骼
     'cf_J_Mayu_ty': (1.36853e-05, 0.0106744692, 0.0),
     'cf_J_Mayumoto_L': (0.0005722754, -0.0010105595, 0.0111785308),
     'cf_J_Mayu_L': (0.0005722754, -0.0010105595, 0.0111785308),
@@ -498,20 +500,15 @@ class modify_armature(bpy.types.Operator):
         c.switch(armature, 'edit')
         
         # 定义必须保留的骨骼（即使不在 better_fbx_bone_tails 中）
-        # 这些是 KKBP 后续步骤需要的特殊骨骼
+        # 注意：在 C 模式下，不保留 IK 控制骨骼（cf_pv_*）
         must_keep_bones = [
-            'cf_pv_root',           # IK 根骨骼
-            'cf_pv_hand_L', 'cf_pv_hand_R',     # 手部 IK
-            'cf_pv_elbo_L', 'cf_pv_elbo_R',     # 肘部 IK
-            'cf_pv_foot_L', 'cf_pv_foot_R',     # 脚部 IK
-            'cf_pv_knee_L', 'cf_pv_knee_R',     # 膝盖 IK
             'cf_hit_head',          # 头部碰撞
             'p_cf_body_bone',       # 身体骨骼
             'p_cf_head_bone',       # 头部骨骼
             'a_n_back',             # 背部锚点
             'a_n_headside',         # 头部侧面锚点
-            'cf_J_hitomi_tx_R',
+            'cf_J_hitomi_tx_R',     # 右眼瞳控制
-            'cf_J_hitomi_tx_L',
+            'cf_J_hitomi_tx_L',     # 左眼瞳控制
         ]
         
         # 收集所有需要删除的骨骼（不在 better_fbx_bone_tails 中且不在必须保留列表中的）
@@ -529,7 +526,7 @@ class modify_armature(bpy.types.Operator):
                 armature.data.edit_bones.remove(armature.data.edit_bones[bone_name])
                 deleted_count += 1
         
-        print(f"[KKBP] 已删除 {deleted_count} 个配饰骨骼")
+        print(f"[KKBP] 已删除 {deleted_count} 个配饰骨骼（包括 IK 控制骨骼）")
         print(f"[KKBP] 保留了 {len(better_fbx_bone_tails)} 个核心骨骼 + {len(must_keep_bones)} 个必需骨骼")
         
         c.switch(armature, 'object')