web: unify Agent management and add a draggable link board

Replace Probe pages with directed Agent links, shared deployment controls and unified display data. Add node dragging, canvas pan and zoom, saved layouts, and per-direction link controls.

web/admin/src/pages/CapabilityPicker.tsx

@@ -6,7 +6,7 @@ import { Chip } from '@shared/ui'
 /** 能力的中文名和说明。目录（分组、依赖、预设）来自后端，这里只管显示文字。 */
 const NAMES: Record<string, [string, string]> = {
   'public.read': ['查看展示数据', '看隐藏线路；站点私有时看展示页'],
-  'fleet.read': ['查看节点', 'Agent、Probe、线路、加入代码'],
+  'fleet.read': ['查看节点', 'Agent、线路、加入代码'],
   'fleet.write': ['修改节点', '改名、标签、可见性、地址、线路开关、断开会话'],
   'fleet.enroll': ['添加节点', '生成加入代码、批准新节点'],
   'fleet.revoke': ['吊销或删除节点', '破坏性操作'],