feat: 新增预算费控模型与报销审批流引擎

后端新增预算费控服务和报销单审批流模块，引入申请人费用画像
算法，优化知识库 RAG 运行时和同步逻辑，完善报销单工作流常
量和明细同步，更新差旅报销规则电子表格，前端新增预算分析
组件和数字员工模型，完善审批对话框和洞察面板交互，优化侧
边栏和顶栏样式，补充单元测试。

server/tests/test_knowledge_rag_runtime.py

@@ -0,0 +1,35 @@
+from __future__ import annotations
+
+import pytest
+
+from app.services.knowledge_rag_runtime import (
+    KnowledgeRagError,
+    RuntimeModelConfig,
+    _LightRagRuntime,
+)
+
+
+def test_embedding_probe_error_includes_model_context(monkeypatch) -> None:
+    runtime = _LightRagRuntime.__new__(_LightRagRuntime)
+    config = RuntimeModelConfig(
+        slot="embedding",
+        provider="GLM",
+        model="Embedding-3",
+        endpoint="https://open.bigmodel.cn/api/paas/v4/",
+        api_key="token",
+        capability="embedding",
+    )
+
+    def fail_embeddings(*_args, **_kwargs):
+        raise KnowledgeRagError("token expired")
+
+    monkeypatch.setattr(runtime, "_request_embeddings", fail_embeddings)
+
+    with pytest.raises(KnowledgeRagError) as exc_info:
+        runtime._probe_embedding_dimension(config)
+
+    message = str(exc_info.value)
+    assert "slot=embedding" in message
+    assert "provider=GLM" in message
+    assert "model=Embedding-3" in message
+    assert "token expired" in message