fix: profile import file upload, startup health check, sidebar scroll, node-pty fallback

- Change profile import from server path input to browser file upload (multipart)
- Fix startup script to wait for health check before opening browser
- Add overflow scroll with hidden scrollbar to sidebar nav
- Graceful degradation when node-pty fails to load (WSL compatibility)
- Remove rename button from profile cards
- Restrict profile name input to English letters, numbers, hyphens
- Use raw.githubusercontent.com URLs in README setup script

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/client/src/components/hermes/profiles/ProfileCard.vue

@@ -6,7 +6,7 @@ import { useProfilesStore } from '@/stores/hermes/profiles'
 import { useI18n } from 'vue-i18n'
 
 const props = defineProps<{ profile: HermesProfile }>()
-const emit = defineEmits<{ rename: [name: string] }>()
+const emit = defineEmits<{}>()
 
 const { t } = useI18n()
 const profilesStore = useProfilesStore()
@@ -154,9 +154,6 @@ async function handleExport() {
       >
         {{ t('profiles.switchTo') }}
       </NButton>
-      <NButton size="tiny" quaternary @click="emit('rename', profile.name)">
-        {{ t('profiles.rename') }}
-      </NButton>
       <NButton
         size="tiny"
         quaternary