fix(ui): fix accessibility hierarchy, dark mode button contrast, and layout regressions

src/i18n/locales/en.ts

@@ -494,7 +494,7 @@ export const en: Record<MessageKey, string> = {
   'usage.stat.successMetaTitle': '{success} succeeded, {failed} failed, {canceled} canceled',
   'usage.stat.averageLatency': 'Average Latency',
   'usage.stat.tps': 'TPS',
-  'usage.stat.performanceMeta': '{samples} samples · RPM {rpm} · {latency} ms',
+  'usage.stat.performanceMeta': '{samples} samples · RPM {rpm}',
   'usage.stat.performanceMetaTitle': 'TPS {tps} (weighted by total latency), {samples} valid samples, RPM {rpm}, average latency {latency} ms',
   'usage.stat.cacheHitRate': 'Cache Hit Rate',
   'usage.stat.cacheHitMeta': 'Read {hit} · Input {input}',
@@ -1456,8 +1456,8 @@ export const en: Record<MessageKey, string> = {
   'kernel.install.completed': '{version} installed',
   'kernel.error.progressListener': 'Failed to listen for download progress: {error}',
   'kernel.action.start': 'start',
-  'kernel.action.stop': 'stop',
-  'kernel.action.restart': 'restart',
+  'kernel.action.stop': 'Stop',
+  'kernel.action.restart': 'Restart',
   'kernel.notice.actionSuccess': 'Core {action} succeeded',
   'kernel.notice.actionFailed': 'Core {action} failed: {error}',
   'kernel.notice.networkRestarted': 'Network settings saved and the core restarted',