Scene Manager: fixes from the first run against a real Libreflow

- Update / version switch: Blender 5.2 replaces the library on reload
  (renamed after its file, custom properties gone); find it by path and
  restore its name and tags.
- Remove the libraries an asset linked indirectly when it is removed or
  fails to load (remove_unused_libraries), never a managed one.
- Config: real Kitsu asset types for link modes and Shot Viewer groups,
  setdress_low files for bg_location, "environments" collection fallback.
- Dev fake server and test use the real asset types; rock links a node
  group from the essentials to cover the indirect library cleanup.
- README and CLAUDE.md updated with the live findings.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

dev/test_scene_manager.py

@@ -32,7 +32,7 @@ shot_viewer = sys.modules[PACKAGE + ".shot_viewer"]
 SERVER_FILE = os.path.join(WORKDIR, "kabaret", "server.json")
 config.LIBREFLOW_SERVER_FILE = SERVER_FILE
 SHOT = "/melvile/films/f01/sequences/s010/shots/p010"
-BOB_FILE = "/melvile/asset_types/chars/assets/bob/tasks/rigging/files/rig_blend"
+BOB_FILE = "/melvile/asset_types/main_character/assets/bob/tasks/rigging/files/rig_blend"
 FAILED = []
 
 
@@ -102,7 +102,7 @@ check("bob: 2 instances of v002", state.get("bob") == ("v002", ["COL_bob", "COL_
 check("tree: 1 collection instance", state.get("tree") == ("v001", ["tree"]), str(state.get("tree")))
 check("rock: single top-level collection fallback", state.get("rock") == ("v001", ["rock_geo"]))
 check("lamp and ghost reported", "lamp" in message() and "ghost" in message(), message())
-check("type collections", {"COL_chars", "COL_sets", "COL_props"} <= set(scene.collection.children.keys()))
+check("type collections", {"COL_main_character", "COL_bg_set", "COL_main_props"} <= set(scene.collection.children.keys()))
 check(
     "chars are posable overrides",
     all(ob.override_library for ob in bpy.data.collections["COL_bob"].all_objects),
@@ -148,6 +148,7 @@ bpy.ops.wtd_scene.remove(selected=True)
 check("selected instance removed", loaded()["tree"][1] == [])
 bpy.ops.wtd_scene.remove("EXEC_DEFAULT", library="rock")
 check("whole asset removed", "rock" not in bpy.data.libraries)
+check("its indirect library removed too", set(bpy.data.libraries.keys()) == {"bob", "tree"}, str(bpy.data.libraries.keys()))
 bpy.ops.wtd_scene.load()
 pump()
 check("load restores what is missing", {k: len(v[1]) for k, v in loaded().items()} == {"bob": 2, "rock": 1, "tree": 1})
@@ -155,7 +156,7 @@ check("load restores what is missing", {k: len(v[1]) for k, v in loaded().items(
 print("Ambiguous file")
 try:
     lib.link_asset(
-        {"name": "zzz", "oid": "x", "asset_type": "props", "file": {"file_oid": "f"}},
+        {"name": "zzz", "oid": "x", "asset_type": "main_props", "file": {"file_oid": "f"}},
         {"name": "v1", "path": os.path.join(WORKDIR, "lib", "bob", "v001", "rig.blend")},
         SHOT,
     )
@@ -170,7 +171,7 @@ local.objects.link(bpy.data.objects.new("GEO_lamp", bpy.data.meshes.new("GEO_lam
 check("only free local collections offered", [c.name for c in lib.assetize_candidates()] == ["COL_lamp"])
 sm.STATE.assets = ipc.call("wtd_list_assets", None, oid=SHOT)
 bpy.ops.wtd_scene.assetize(
-    "EXEC_DEFAULT", collection="COL_lamp", asset_type="props", asset_name="lamp", task="modeling", comment="test"
+    "EXEC_DEFAULT", collection="COL_lamp", asset_type="main_props", asset_name="lamp", task="modeling", comment="test"
 )
 pump()
 check("published and replaced", "replaced" in message(), message())
@@ -178,7 +179,7 @@ check("lamp linked", loaded().get("lamp") == ("v001", ["COL_lamp"]), str(loaded(
 check("local collection kept, renamed", "COL_lamp_local" in bpy.data.collections)
 bad = bpy.data.collections.new("COL_bad")
 scene.collection.children.link(bad)
-bpy.ops.wtd_scene.assetize("EXEC_DEFAULT", collection="COL_bad", asset_type="props", asset_name="bad", task="layout")
+bpy.ops.wtd_scene.assetize("EXEC_DEFAULT", collection="COL_bad", asset_type="main_props", asset_name="bad", task="layout")
 pump()
 check("unknown task reported", "available: modeling, rigging" in message(), message())