feat: add primary badge selection for user profiles

Implements #49 - Allow users to select one primary badge to display
on their profile instead of showing all badges at once.

Changes:
- Add PrimaryBadge enum to Prisma schema and shared types (STAFF, MOD, VIP, DISCORD)
- Add primaryBadge field to User model and all user interfaces
- Update settings component with badge selection dropdown
- Only show badges the user actually has in the dropdown
- Update profile component to display only selected badge (or all if none selected)
- Add primaryBadge to admin profile edit modal
- Update API routes and services to handle primaryBadge
- Export PrimaryBadge enum from shared-types (not just as type)

Additional fixes:
- Fix Angular output naming: rename onEdit/onDelete to edit/delete
- Update all parent components using comment-display outputs
- Add type casting for Prisma PrimaryBadge enum to shared-types enum

apps/frontend/src/app/components/art/art-gallery.component.ts

@@ -471,8 +471,8 @@ import { Art, CreateArtDto, UpdateArtDto, Comment, SuggestionEntity, Link } from
 
                       <app-comment-display
                         [comments]="getCommentsSignal(art.id)"
-                        (onEdit)="handleCommentEdit(art.id, $event)"
-                        (onDelete)="deleteComment(art.id, $event)"
+                        (edit)="handleCommentEdit(art.id, $event)"
+                        (delete)="deleteComment(art.id, $event)"
                       />
                     </div>
                   }