Improve topology canvas UX and vendor NE icons.

Replace the top selection bar with a context menu, tighten map/palette cards and fullscreen controls, and tint the router asset by vendor (ZTE keeps default blue).

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

web/src/i18n/zh.ts

@@ -689,12 +689,14 @@ const zh = {
     save: "保存",
     saving: "保存中…",
     saved: "拓扑已保存",
-    discover: "发现链路",
+    discover: "发现全量链路",
     discovering: "发现中…",
+    discoverOne: "发现链路",
     discovered: "发现完成：新增 {{added}}，更新 {{updated}}，未发现 {{stale}}",
     discoverFail: "发现失败：{{detail}}",
+    discoverOneNeedNe: "该节点未关联可扫描网元",
     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；蓝虚线=发现链路，红虚线=本次未发现（可删）",
+    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）；右键节点可操作",
     selected: "已选节点",
     selectedEdge: "已选链路",
     openWebcrt: "打开终端",
@@ -706,6 +708,8 @@ const zh = {
     edgeDiscovered: "发现",
     edgeStale: "未发现",
     fit: "适应画布",
+    fullscreen: "全屏显示",
+    exitFullscreen: "退出全屏",
     display: "显示选项",
     hideIp: "隐藏 IP",
     hideVendor: "隐藏厂商",