fix: update error handling to check for NEO4J_PASSWORD instead of ZEP_API_KEY in simulation API

- Changed error messages to reflect the new configuration requirement for Neo4j.
- Ensured consistent handling of missing credentials across multiple functions.

backend/app/api/simulation.py

@@ -56,10 +56,10 @@ def get_graph_entities(graph_id: str):
         enrich: 是否获取相关边信息（默认true）
     """
     try:
-        if not Config.ZEP_API_KEY:
+        if not Config.NEO4J_PASSWORD:
             return jsonify({
                 "success": False,
-                "error": "ZEP_API_KEY未配置"
+                "error": "NEO4J未配置"
             }), 500
         
         entity_types_str = request.args.get('entity_types', '')
@@ -93,10 +93,10 @@ def get_graph_entities(graph_id: str):
 def get_entity_detail(graph_id: str, entity_uuid: str):
     """获取单个实体的详细信息"""
     try:
-        if not Config.ZEP_API_KEY:
+        if not Config.NEO4J_PASSWORD:
             return jsonify({
                 "success": False,
-                "error": "ZEP_API_KEY未配置"
+                "error": "NEO4J未配置"
             }), 500
         
         reader = ZepEntityReader()
@@ -126,10 +126,10 @@ def get_entity_detail(graph_id: str, entity_uuid: str):
 def get_entities_by_type(graph_id: str, entity_type: str):
     """获取指定类型的所有实体"""
     try:
-        if not Config.ZEP_API_KEY:
+        if not Config.NEO4J_PASSWORD:
             return jsonify({
                 "success": False,
-                "error": "ZEP_API_KEY未配置"
+                "error": "NEO4J未配置"
             }), 500
         
         enrich = request.args.get('enrich', 'true').lower() == 'true'

frontend/package-lock.json

@@ -1331,7 +1331,6 @@
       "resolved": "https://registry.npmjs.org/d3-selection/-/d3-selection-3.0.0.tgz",
       "integrity": "sha512-fmTRWbNMmsmWq6xJV8D19U/gw/bwrHfNXxrIN+HfZgnzqTHp9jOmKMhsTUjXOJnZOdZY9Q28y4yebKzqDKlxlQ==",
       "license": "ISC",
-      "peer": true,
       "engines": {
         "node": ">=12"
       }
@@ -1809,7 +1808,6 @@
       "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=12"
       },
@@ -1943,7 +1941,6 @@
       "integrity": "sha512-ITcnkFeR3+fI8P1wMgItjGrR10170d8auB4EpMLPqmx6uxElH3a/hHGQabSHKdqd4FXWO1nFIp9rRn7JQ34ACQ==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "esbuild": "^0.25.0",
         "fdir": "^6.5.0",
@@ -2018,7 +2015,6 @@
       "resolved": "https://registry.npmjs.org/vue/-/vue-3.5.25.tgz",
       "integrity": "sha512-YLVdgv2K13WJ6n+kD5owehKtEXwdwXuj2TTyJMsO7pSeKw2bfRNZGjhB7YzrpbMYj5b5QsUebHpOqR3R3ziy/g==",
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "@vue/compiler-dom": "3.5.25",
         "@vue/compiler-sfc": "3.5.25",