fix: update terminology for direct tools in English and Chinese localization files

web/messages/en-US.json

@@ -1087,7 +1087,7 @@
     "sectionCapabilities": "Capabilities",
     "knowledgeTab": "Knowledge",
     "skillsTab": "Skills",
-    "directToolsTab": "Direct Tools",
+    "directToolsTab": "MCP tools",
     "graphToolsTab": "Graph Tools",
     "knowledgeHint": "Select at least one knowledge base. You can adjust priority order.",
     "selectKnowledge": "Select and add knowledge base",

web/messages/zh-CN.json

@@ -1087,8 +1087,8 @@
     "sectionCapabilities": "能力配置",
     "knowledgeTab": "知识库",
     "skillsTab": "Skills",
-    "directToolsTab": "Direct Tools",
-    "graphToolsTab": "Graph Tools",
+    "directToolsTab": "MCP tools",
+    "graphToolsTab": "内置流程",
     "knowledgeHint": "至少选择一个知识库，可调整知识库优先级。",
     "selectKnowledge": "选择并添加知识库",
     "searchKnowledge": "搜索知识库",