i18n: translate the channel and member sidebars

Clears the two remaining rounds owed under the fork's per-update translation
rule.

Covers channels, direct messages, the context menus, the inline voice settings
and the member list's loading and grouping labels.

The member grouping needed care: one function returns either a fixed label or
a role's own name, and role names are user data that must never be translated.
It now marks only the fixed cases and the component resolves them at render,
leaving role names untouched. The function is not a component, so it cannot
call the hook itself.

packages/web/src/i18n/locales/pt-BR.ts

@@ -55,6 +55,28 @@ export const ptBR: Partial<Dictionary> = {
   'accountMenu.copyId': 'Copiar ID do usuário',
   'accountMenu.copied': 'Copiado',
 
+  // Barra lateral — servidores, canais e membros
+  'sidebar.friends': 'Amigos',
+  'sidebar.directMessages': 'Mensagens diretas',
+  'sidebar.noChannels': 'Nenhum canal',
+  'sidebar.comingSoon': 'Em breve',
+  'sidebar.loadingChannels': 'Carregando canais',
+  'sidebar.loadingMembers': 'Carregando membros',
+  'sidebar.groupOnline': 'DISPONÍVEIS',
+  'sidebar.groupOwner': 'DONO',
+  'sidebar.createChannel': 'Criar canal',
+  'sidebar.createCategory': 'Criar categoria',
+  'sidebar.categorySettings': 'Configurações da categoria',
+  'sidebar.deleteCategory': 'Excluir categoria',
+  'sidebar.invitePeople': 'Convidar pessoas',
+  'sidebar.spaceSettings': 'Configurações do servidor',
+  'sidebar.leaveGroup': 'Sair do grupo',
+  'sidebar.voiceSettings': 'Configurações de voz',
+  'sidebar.inputDevice': 'Dispositivo de entrada',
+  'sidebar.inputVolume': 'Volume de entrada',
+  'sidebar.outputDevice': 'Dispositivo de saída',
+  'sidebar.outputVolume': 'Volume de saída',
+
   // Chat — composer e mensagens
   'chat.composer.placeholder': 'Conversar em {channel}',
   'chat.composer.attach': 'Anexar arquivo',