feat(web): unify vehicle source navigation

vehicle-data-platform/apps/web/src/v2/pages/VehicleSearchWorkspace.tsx

@@ -193,12 +193,13 @@ export default function VehicleSearchWorkspace() {
       /> : null}
       {mobileLayout ? <div className="v2-vehicle-mobile-discovery">
         <MobileFilterToggle
-          title="车辆范围"
+          title="查找车辆"
           summary={mobileFilterSummary}
           expanded={mobileFiltersOpen}
           controls="v2-vehicle-mobile-filter-dialog"
           expandedLabel="关闭"
-          collapsedLabel="修改"
+          collapsedLabel="查找"
+          ariaLabel={`${mobileFiltersOpen ? '关闭' : '打开'}车辆搜索：${mobileFilterSummary}`}
           onToggle={mobileFiltersOpen ? closeMobileFilters : openMobileFilters}
         />
         <MobileFilterSheet