feat(app): show skill/mcp badges for slash commands

Display 'skill' or 'mcp' badge instead of 'custom' for slash commands
based on their source type. This provides better clarity to users about
where each command comes from.

packages/app/src/i18n/es.ts

@@ -210,6 +210,8 @@ export const dict = {
   "prompt.popover.emptyCommands": "Sin comandos coincidentes",
   "prompt.dropzone.label": "Suelta imágenes o PDFs aquí",
   "prompt.slash.badge.custom": "personalizado",
+  "prompt.slash.badge.skill": "skill",
+  "prompt.slash.badge.mcp": "mcp",
   "prompt.context.active": "activo",
   "prompt.context.includeActiveFile": "Incluir archivo activo",
   "prompt.context.removeActiveFile": "Eliminar archivo activo del contexto",