fix: enlarge prop editor and support pinned property tips

Make the double-click editor wider with auto-growing textareas, clamp hover tips inside the viewport, and allow click-to-pin / right-click-to-unpin for presentation.

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

apps/web/src/canvas-ui-text.ts

@@ -77,7 +77,7 @@ const zh: CanvasUi = {
   card: "卡片",
   topology: "拓扑",
   bubbleTitle: "气泡视图：精简标题",
-  cardTitle: "卡片视图：单击展开全文 · 悬停属性看详情 · 双击编辑",
+  cardTitle: "卡片：单击属性钉住浮层 · 右键释放 · 双击编辑",
   topologyTitle: "拓扑视图：路由器图标 + 链路",
   unpin: "解钉",
   unpinTitle: "取消钉住：让选中节点重新参与自动布局",
@@ -127,7 +127,7 @@ const en: CanvasUi = {
   card: "Card",
   topology: "Topology",
   bubbleTitle: "Bubble view: title only",
-  cardTitle: "Card view: click expand · hover props · double-click edit",
+  cardTitle: "Card: click prop to pin tip · right-click unpin · double-click edit",
   topologyTitle: "Topology view: router icons + links",
   unpin: "Unpin",
   unpinTitle: "Unpin selected node for auto layout",