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/da.ts

@@ -210,6 +210,8 @@ export const dict = {
   "prompt.popover.emptyCommands": "Ingen matchende kommandoer",
   "prompt.dropzone.label": "Slip billeder eller PDF'er her",
   "prompt.slash.badge.custom": "brugerdefineret",
+  "prompt.slash.badge.skill": "skill",
+  "prompt.slash.badge.mcp": "mcp",
   "prompt.context.active": "aktiv",
   "prompt.context.includeActiveFile": "Inkluder aktiv fil",
   "prompt.context.removeActiveFile": "Fjern aktiv fil fra kontekst",