Show folder breadcrumb hierarchy with one-level back, and drop unused P/N badges.

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

web/src/i18n/en.ts

@@ -1422,7 +1422,6 @@ const en = {
     openRegion: "Open",
     kindPhysical: "Physical",
     kindCustom: "Custom",
-    regionNodeHint: "{{count}}P",
     layerNodeHint: "{{count}} NE(s)",
     layerNodeEmpty: "Click to create & open",
     rootCanvasHint: "Pick a root from the left tree.",

web/src/i18n/zh.ts

@@ -1412,7 +1412,6 @@ const zh = {
     openRegion: "打开",
     kindPhysical: "物理拓扑",
     kindCustom: "自定义图",
-    regionNodeHint: "{{count}}P",
     layerNodeHint: "{{count}} 个网元",
     layerNodeEmpty: "点击创建并打开",
     rootCanvasHint: "从左侧选择根进入目录。",