fix: enable table ellipsis tips on traffic ops columns

Turn on TDesign built-in ellipsis for long text columns in
package, purchase, and ledger tables.

src/views/TrafficOpsView/TrafficOpsView.vue

@@ -395,8 +395,8 @@ const pkgStatusOptions = [
   { label: '下架', value: 'inactive' }
 ]
 const pkgColumns = [
-  { colKey: 'code', title: '编码', width: '12%' },
-  { colKey: 'name', title: '名称', width: '14%' },
+  { colKey: 'code', title: '编码', width: '12%', ellipsis: true },
+  { colKey: 'name', title: '名称', width: '14%', ellipsis: true },
   { colKey: 'amountText', title: '额度', width: '10%' },
   { colKey: 'priceText', title: '价格', width: '8%' },
   { colKey: 'validityText', title: '有效期', width: '10%' },
@@ -558,8 +558,8 @@ const purchaseStatusOptions = [
   { label: '失效', value: 'inactive' }
 ]
 const purchaseColumns = [
-  { colKey: 'batchNo', title: '批次号', width: '12%' },
-  { colKey: 'provider', title: '供应商', width: '10%' },
+  { colKey: 'batchNo', title: '批次号', width: '12%', ellipsis: true },
+  { colKey: 'provider', title: '供应商', width: '10%', ellipsis: true },
   { colKey: 'totalText', title: '总量', width: '10%' },
   { colKey: 'costText', title: '成本', width: '10%' },
   { colKey: 'expiresAt', title: '到期', width: '14%' },
@@ -682,9 +682,9 @@ const ledgerColumns = [
   { colKey: 'accountType', title: '账户类型', width: '8%' },
   { colKey: 'accountId', title: '账户ID', width: '10%' },
   { colKey: 'direction', title: '方向', width: '7%' },
-  { colKey: 'amountText', title: '金额', width: '12%' },
-  { colKey: 'balanceText', title: '余额前→后', width: '14%' },
-  { colKey: 'sourceType', title: '来源', width: '10%' },
+  { colKey: 'amountText', title: '金额', width: '12%', ellipsis: true },
+  { colKey: 'balanceText', title: '余额前→后', width: '14%', ellipsis: true },
+  { colKey: 'sourceType', title: '来源', width: '10%', ellipsis: true },
   { colKey: 'sourceId', title: '来源ID', width: '10%', ellipsis: true },
   { colKey: 'idempotencyKey', title: '幂等键', width: '12%', ellipsis: true }
 ]