fix: venue tab filtering using String() comparison for large IDs

- Fixed JavaScript precision loss issue with large venue IDs
- Changed Number() to String() comparison in filteredCompetitionGroups
- Changed Number() to String() comparison in venueData computed property
- Added ExportPreview component

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

src/api/martial/activitySchedule.js

@@ -188,6 +188,15 @@ export const saveDispatch = (data) => {
  * 导出赛程表
  * @param {Number} competitionId - 赛事ID
  */
+// 预览赛程表数据
+export const getScheduleExportPreview = (competitionId, template, venueId) => {
+  return request({
+    url: "/api/martial/export/schedule/preview",
+    method: "get",
+    params: { competitionId, template, venueId }
+  })
+}
+
 export const exportSchedule = (competitionId) => {
   return request({
     url: '/martial/export/schedule',
@@ -197,7 +206,7 @@ export const exportSchedule = (competitionId) => {
   })
 }
 
-// Export schedule template 2 (competition time format)
+
 export const exportScheduleTemplate2 = (competitionId, venueId, venueName, timeSlot) => {
   return request({
     url: '/martial/export/schedule2',