feat: 添加持仓数据类型和组件，支持持仓信息的展示与刷新功能

src/locales/en-US.json

@@ -304,6 +304,22 @@
     },
     "loadMore": "Load More"
   },
+  "holdings": {
+    "title": "My Holdings",
+    "empty": "No holdings yet",
+    "nameCode": "Name/Code",
+    "quantity": "Quantity",
+    "totalValue": "Total Value",
+    "purchaseDate": "Purchase Date",
+    "status": {
+      "active": "Active",
+      "tokenized": "Tokenized",
+      "locked": "Locked"
+    },
+    "units": {
+      "shares": "shares"
+    }
+  },
   "market": {
     "title": "Market",
     "search": {