Stream topology discovery progress and mark missing links stale.

SSE updates the UI per NE; edges not seen in a successful scan turn red and can be cleared.

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

web/src/i18n/zh.ts

@@ -609,17 +609,20 @@ const zh = {
     saved: "拓扑已保存",
     discover: "发现链路",
     discovering: "发现中…",
-    discovered: "发现完成：新增 {{added}}，更新 {{updated}}",
+    discovered: "发现完成：新增 {{added}}，更新 {{updated}}，未发现 {{stale}}",
     discoverFail: "发现失败：{{detail}}",
     selectMap: "请选择或新建一张拓扑图",
-    canvasHint: "从左侧添加网元，拖动节点并连线；虚线为 LLDP/CDP 发现链路",
+    canvasHint: "从左侧添加网元，拖动节点并连线；蓝虚线=发现链路，红虚线=本次未发现（可删）",
     selected: "已选节点",
+    selectedEdge: "已选链路",
     openWebcrt: "打开终端",
     openNe: "网元详情",
     removeNode: "从画布移除",
+    removeEdge: "删除链路",
     noNeLink: "未关联托管网元",
     edgeManual: "人工",
     edgeDiscovered: "发现",
+    edgeStale: "未发现",
     fit: "适应画布",
     display: "显示选项",
     hideIp: "隐藏 IP",
@@ -635,6 +638,16 @@ const zh = {
     paletteManaged: "托管网元",
     paletteUme: "UME 网元",
     paletteLoading: "加载中…",
+    discoverReport: "发现进度",
+    discoverClose: "关闭",
+    discoverProgress: "正在扫描画布上 {{count}} 台托管网元（串行登录采集 LLDP，请稍候）…",
+    discoverProgressLive: "正在扫描 {{index}}/{{total}}：{{name}}",
+    discoverSummary: "扫描 {{scanned}} 台 · 新增 {{added}} · 更新 {{updated}} · 未发现 {{stale}} · 失败 {{failed}}",
+    discoverNeOk: "邻居 {{neighbors}} · 新增 {{added}} · 更新 {{updated}}",
+    discoverNeFail: "采集失败",
+    removeStale: "清除未发现 ({{count}})",
+    removeStaleHint: "删除红色标记的未发现链路",
+    staleRemoved: "已删除 {{count}} 条未发现链路",
   },
 };