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/fr.ts

@@ -210,6 +210,8 @@ export const dict = {
   "prompt.popover.emptyCommands": "Aucune commande correspondante",
   "prompt.dropzone.label": "Déposez des images ou des PDF ici",
   "prompt.slash.badge.custom": "personnalisé",
+  "prompt.slash.badge.skill": "skill",
+  "prompt.slash.badge.mcp": "mcp",
   "prompt.context.active": "actif",
   "prompt.context.includeActiveFile": "Inclure le fichier actif",
   "prompt.context.removeActiveFile": "Retirer le fichier actif du contexte",