M2a：镜树域后端核心——树/节点/引文/归真/移栽全量 API 与 Kernel 完成回调（芽体固化/残答封存），8 用例钉死 PRD 场景 1/2/3/5/6/7/8

backend/app/domains/mirror_tree/__init__.py

@@ -0,0 +1,47 @@
+"""镜树域：树状对话、采用/归真分离、引文锚与移栽（data-model.md §2）。"""
+
+from app.domains.mirror_tree.service import (
+    adopt,
+    ancestor_chain,
+    archive_tree,
+    canonize,
+    continue_node,
+    create_citation,
+    create_question,
+    create_tree,
+    edit_fork,
+    get_tree_view,
+    list_citations,
+    list_trees,
+    local_graph,
+    rename_tree,
+    node_view,
+    path_view,
+    resume_node,
+    spawn_answer,
+    transplant,
+    tree_view,
+)
+
+__all__ = [
+    "adopt",
+    "ancestor_chain",
+    "archive_tree",
+    "canonize",
+    "continue_node",
+    "create_citation",
+    "create_question",
+    "create_tree",
+    "edit_fork",
+    "get_tree_view",
+    "list_citations",
+    "list_trees",
+    "local_graph",
+    "rename_tree",
+    "node_view",
+    "path_view",
+    "resume_node",
+    "spawn_answer",
+    "transplant",
+    "tree_view",
+]