feat: split victories into tabbed sections (place/nomination/judge)

Add type field to VictoryItem, tabbed UI in trainer profile,
and type dropdown in admin form.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/types/content.ts

@@ -14,6 +14,7 @@ export interface RichListItem {
 }
 
 export interface VictoryItem {
+  type?: 'place' | 'nomination' | 'judge';
   place: string;
   category: string;
   competition: string;