fix(import): skeleton rest fixer animation conversion in headless mode

The %GeneralSkeleton unique node resolution via get_node() fails during
headless import (--import flag), causing ALL animation tracks to be
silently skipped by ERR_CONTINUE. Rest poses get overwritten but animation
keyframe values stay in the old coordinate system, producing incorrect
bone orientations (e.g., arms crossed behind back).

Fix: fall back to find_child() when unique name resolution fails.
Added extensive logging for retarget debugging.

Tinqs fork v1.0.1

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

editor/import/3d/post_import_plugin_skeleton_rest_fixer.cpp

@@ -730,13 +730,34 @@ void PostImportPluginSkeletonRestFixer::internal_process(InternalImportCategory
 							}
 
 							String track_path = String(anim->track_get_path(i).get_concatenated_names());
-							Node *node = (ap->get_node(ap->get_root_node()))->get_node(NodePath(track_path));
+
-							ERR_CONTINUE(!node);
+							// [TINQS] Fix: %UniqueNode resolution fails in headless/import context.
+							// Fall back to find_child when get_node fails (e.g., headless --import).
+							Node *node = nullptr;
+							Node *anim_root = ap->get_node_or_null(ap->get_root_node());
+							if (anim_root) {
+								node = anim_root->get_node_or_null(NodePath(track_path));
+							}
+							if (!node && track_path.begins_with(UNIQUE_NODE_PREFIX)) {
+								// Unique name resolution failed — try direct child search.
+								String skel_name = track_path.substr(1); // Strip % prefix.
+								node = p_base_scene->find_child(skel_name, true, false);
+								if (node) {
+									print_verbose(vformat("[RetargetRestFixer] Resolved '%s' via find_child fallback -> '%s'", track_path, node->get_name()));
+								} else {
+									WARN_PRINT(vformat("[RetargetRestFixer] Failed to resolve skeleton node '%s' — animation keyframes will NOT be converted to new rest pose. This may cause incorrect bone orientations.", track_path));
+								}
+							}
+							if (!node) {
+								WARN_PRINT(vformat("[RetargetRestFixer] Skipping track %d: cannot resolve node path '%s' from AnimationPlayer root.", i, track_path));
+								continue;
+							}
 
 							Skeleton3D *track_skeleton = Object::cast_to<Skeleton3D>(node);
 							if (!track_skeleton ||
 									(is_using_modifier && track_skeleton != profile_skeleton && track_skeleton != orig_skeleton) ||
 									(!is_using_modifier && track_skeleton != src_skeleton)) {
+								print_verbose(vformat("[RetargetRestFixer] Skipping track %d: skeleton mismatch (found '%s', expected src_skeleton).", i, node->get_name()));
 								continue;
 							}
 
@@ -746,6 +767,7 @@ void PostImportPluginSkeletonRestFixer::internal_process(InternalImportCategory
 							}
 
 							int bone_idx = src_skeleton->find_bone(bn);
+							print_verbose(vformat("[RetargetRestFixer] Converting track %d bone '%s' (idx=%d) — %d keys", i, bn, bone_idx, anim->track_get_key_count(i)));
 
 							if (is_using_modifier) {
 								int prof_idx = profile->find_bone(bn);