a11y 收尾：主题级对比度根因修复（indigo-500→600）+12 处控件 accessible name+4 处 heading-order，7 页复扫全 0 违规；基准 total_issues 保持 8

Result: {"status":"keep","total_issues":8,"eslint_errors":0,"eslint_problems":0,"eslint_warnings":0,"golint_canonicalheader":0,"golint_errname":0,"golint_errorlint":1,"golint_exhaustive":0,"golint_forcetypeassert":0,"golint_gosec":0,"golint_intrange":0,"golint_modernize":3,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":0,"golint_recvcheck":1,"golint_test_testifylint":0,"golint_test_thelper":0,"golint_test_total":0,"golint_test_usetesting":0,"golint_total":8,"golint_usestdlibvars":0,"golint_vetx_total":0,"golint_wastedassign":0,"measure_s":85,"tsc_errors":0,"vitest_failed":0,"vitest_total":126}

frontend/app/(main)/admin/push/components/events-tab.tsx

@@ -434,6 +434,7 @@ export function EventsTab() {
                       onCheckedChange={() =>
                         toggleEventMutation.mutate(event.id)
                       }
+                      aria-label={t('colStatus')}
                       className='scale-75'
                     />
                   </TableCell>
@@ -448,6 +449,7 @@ export function EventsTab() {
                             <Button
                               variant='ghost'
                               size='icon'
+                              aria-label={t('configure')}
                               className='h-6 w-6 text-muted-foreground hover:text-foreground'
                               onClick={() => handleEditEventClick(event)}
                             >
@@ -466,6 +468,7 @@ export function EventsTab() {
                             <Button
                               variant='ghost'
                               size='icon'
+                              aria-label={t('delete')}
                               className='h-6 w-6 text-muted-foreground hover:text-destructive hover:bg-destructive/10'
                               disabled={deleteEventMutation.isPending}
                               onClick={() => setDeleteTarget(event)}