refactor(router): 移除废弃的graph兼容性接口并合并测试

将废弃的lightrag兼容性接口从graph_router.py中移除
删除单独的test_graph_router.py测试文件
在test_unified_graph_router.py中添加相关测试

server/routers/graph_router.py

@@ -209,51 +209,6 @@ async def get_graph_stats(
         raise HTTPException(status_code=500, detail=f"Failed to get stats: {str(e)}")
 
 
-# =============================================================================
-# === 兼容性接口 (Deprecated/Compatibility) ===
-# =============================================================================
-
-
-@graph.get("/lightrag/subgraph")
-async def get_lightrag_subgraph(
-    db_id: str = Query(..., description="数据库ID"),
-    node_label: str = Query(..., description="节点标签或实体名称"),
-    max_depth: int = Query(2, description="最大深度", ge=1, le=5),
-    max_nodes: int = Query(100, description="最大节点数", ge=1, le=1000),
-    current_user: User = Depends(get_admin_user),
-):
-    """(Deprecated) Use /graph/subgraph instead"""
-    return await get_subgraph(
-        db_id=db_id, node_label=node_label, max_depth=max_depth, max_nodes=max_nodes, current_user=current_user
-    )
-
-
-@graph.get("/lightrag/databases")
-async def get_lightrag_databases(current_user: User = Depends(get_admin_user)):
-    """(Deprecated) Use /graph/list instead"""
-    try:
-        lightrag_databases = knowledge_base.get_lightrag_databases()
-        return {"success": True, "data": {"databases": lightrag_databases}}
-    except Exception as e:
-        raise HTTPException(status_code=500, detail=str(e))
-
-
-@graph.get("/lightrag/labels")
-async def get_lightrag_labels(
-    db_id: str = Query(..., description="数据库ID"), current_user: User = Depends(get_admin_user)
-):
-    """(Deprecated) Use /graph/labels instead"""
-    return await get_graph_labels(db_id=db_id, current_user=current_user)
-
-
-@graph.get("/lightrag/stats")
-async def get_lightrag_stats(
-    db_id: str = Query(..., description="数据库ID"), current_user: User = Depends(get_admin_user)
-):
-    """(Deprecated) Use /graph/stats instead"""
-    return await get_graph_stats(db_id=db_id, current_user=current_user)
-
-
 @graph.get("/neo4j/nodes")
 async def get_neo4j_nodes(
     kgdb_name: str = Query(..., description="知识图谱数据库名称"),

test/api/test_graph_router.py

@@ -1,29 +0,0 @@
-"""
-Integration tests for graph router endpoints.
-"""
-
-from __future__ import annotations
-
-import pytest
-
-pytestmark = [pytest.mark.asyncio, pytest.mark.integration]
-
-
-async def test_graph_routes_require_auth(test_client):
-    response = await test_client.get("/api/graph/lightrag/databases")
-    assert response.status_code == 401
-
-
-async def test_standard_user_cannot_access_graph_endpoints(test_client, standard_user):
-    response = await test_client.get("/api/graph/lightrag/databases", headers=standard_user["headers"])
-    assert response.status_code == 403
-
-
-async def test_admin_can_list_lightrag_databases(test_client, admin_headers, knowledge_database):
-    response = await test_client.get("/api/graph/lightrag/databases", headers=admin_headers)
-    assert response.status_code == 200, response.text
-    payload = response.json()
-    assert payload["success"] is True
-    databases = payload["data"]["databases"]
-    assert isinstance(databases, list)
-    assert any(db["db_id"] == knowledge_database["db_id"] for db in databases)

test/api/test_unified_graph_router.py

@@ -9,6 +9,18 @@ import pytest
 pytestmark = [pytest.mark.asyncio, pytest.mark.integration]
 
 
+async def test_graph_routes_require_auth(test_client):
+    """Test that graph endpoints require authentication."""
+    response = await test_client.get("/api/graph/list")
+    assert response.status_code == 401
+
+
+async def test_standard_user_cannot_access_graph_endpoints(test_client, standard_user):
+    """Test that standard users cannot access graph endpoints."""
+    response = await test_client.get("/api/graph/list", headers=standard_user["headers"])
+    assert response.status_code == 403
+
+
 async def test_get_graphs_list(test_client, admin_headers):
     """Test retrieving the list of all graphs."""
     response = await test_client.get("/api/graph/list", headers=admin_headers)