Add topology-canvas placeholder NE create (source=topology).

Toolbar and pane context menu create placeholders that follow the same setup path as LLDP in NE management and WebCRT.

Co-authored-by: Cursor <cursoragent@cursor.com>

web/src/i18n/en.ts

@@ -737,6 +737,7 @@ const en = {
       ume_sync: "UME sync",
       webcrt: "WebCRT",
       lldp: "LLDP placeholder",
+      topology: "Topology placeholder",
     },
     connect: {
       run: "Connectivity test",
@@ -1123,9 +1124,9 @@ const en = {
     },
     newSession: {
       title: "New Session",
-      claimTitle: "Complete LLDP placeholder",
+      claimTitle: "Complete placeholder session",
       claimHint:
-        "Enter a reachable host. Session name defaults to the LLDP placeholder. On success, source becomes WebCRT.",
+        "Enter a reachable host. Session name defaults to the placeholder name. On success, source becomes WebCRT.",
       connect: "Connect",
       connecting: "Connecting…",
       protocol: "Protocol",
@@ -1454,6 +1455,18 @@ const en = {
     removeNode: "Remove from canvas",
     removeEdge: "Delete edge",
     nodeMenu: "Node",
+    paneMenu: "Canvas",
+    createNe: "Create NE",
+    createNeTitle: "Create topology placeholder NE",
+    createNeHint:
+      "Source is topology placeholder. Complete login via WebCRT, or promote in NE management.",
+    createNeName: "Name",
+    createNeNamePh: "e.g. SW-CORE-01",
+    createNeNameRequired: "NE name is required",
+    createNeIp: "IP (optional)",
+    createNeIpPh: "Can fill later during setup",
+    createNeDone: "Created placeholder {{name}}",
+    createNeBusy: "Creating…",
     selectionMenu: "Selection",
     edgeStyle: "Edge style",
     edgeColor: "Color",

web/src/i18n/zh.ts

@@ -732,6 +732,7 @@ const zh = {
       ume_sync: "UME 同步",
       webcrt: "WebCRT",
       lldp: "LLDP 占位",
+      topology: "拓扑占位",
     },
     connect: {
       run: "连通性测试",
@@ -1117,8 +1118,8 @@ const zh = {
     },
     newSession: {
       title: "新建会话",
-      claimTitle: "完善 LLDP 占位会话",
-      claimHint: "请填写可达地址；会话名默认使用 LLDP 占位名。连接成功后来源将更新为 WebCRT。",
+      claimTitle: "完善占位会话",
+      claimHint: "请填写可达地址；会话名默认使用占位名。连接成功后来源将更新为 WebCRT。",
       connect: "连接",
       connecting: "连接中…",
       protocol: "协议",
@@ -1447,6 +1448,17 @@ const zh = {
     removeNode: "从画布移除",
     removeEdge: "删除链路",
     nodeMenu: "网元",
+    paneMenu: "画布",
+    createNe: "建立网元",
+    createNeTitle: "建立拓扑占位网元",
+    createNeHint: "来源为拓扑占位；完善登录信息后可在 WebCRT 连接，或在网元管理升级为手工。",
+    createNeName: "名称",
+    createNeNamePh: "例如 SW-CORE-01",
+    createNeNameRequired: "请填写网元名称",
+    createNeIp: "IP（可选）",
+    createNeIpPh: "可稍后在完善时填写",
+    createNeDone: "已建立占位网元 {{name}}",
+    createNeBusy: "创建中…",
     selectionMenu: "多选",
     edgeStyle: "链路样式",
     edgeColor: "颜色",