feat(G1,P16A,P16B): 收口主数据核心与节假日日历增强

client/src/components/navigation/NavLinks.tsx

@@ -78,6 +78,12 @@ export const NAV_ITEMS: NavItem[] = [
     icon: "account_tree",
     anyOf: ["system.users"],
   },
+  {
+    to: "/system/master-data",
+    label: "主数据",
+    icon: "dataset",
+    anyOf: ["masterdata.view", "masterdata.manage"],
+  },
   {
     to: "/system/approval-rules",
     label: "审批规则",