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/users/components/user-detail-sheet.tsx

@@ -104,9 +104,9 @@ export function UserDetailSheet({
 
                 <div className='p-6 space-y-6'>
                   <div className='space-y-4'>
-                    <h4 className='text-xs font-semibold text-muted-foreground uppercase tracking-wider px-1'>
+                    <p className='text-xs font-semibold text-muted-foreground uppercase tracking-wider px-1'>
                       {t('personalInfo')}
-                    </h4>
+                    </p>
                     <div className='rounded-lg border divide-y bg-background/50'>
                       <div className='flex items-center justify-between gap-4 p-3.5 text-sm'>
                         <span className='flex items-center gap-2 text-[10px] text-muted-foreground'>
@@ -167,9 +167,9 @@ export function UserDetailSheet({
                   </div>
 
                   <div className='space-y-4'>
-                    <h4 className='text-xs font-semibold text-muted-foreground uppercase tracking-wider px-1'>
+                    <p className='text-xs font-semibold text-muted-foreground uppercase tracking-wider px-1'>
                       {t('systemRecords')}
-                    </h4>
+                    </p>
                     <div className='rounded-lg border divide-y bg-background/50'>
                       <div className='flex items-center justify-between p-3.5 text-sm'>
                         <span className='text-[10px]'>