feat: admin UX improvements — notify buttons, eval config, round finalization

Custom body support for advancement/rejection notification emails, evaluation
config toggle fix, user actions improvements, round finalization with reorder
support, project detail page enhancements, award pool duplicate prevention.

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

src/types/competition-configs.ts

@@ -117,12 +117,14 @@ export const EvaluationConfigSchema = z.object({
       showGlobalScore: z.boolean().default(false),
       showCriterionScores: z.boolean().default(false),
       showFeedbackText: z.boolean().default(false),
+      hideFromRejected: z.boolean().default(false),
     })
     .default({
       enabled: false,
       showGlobalScore: false,
       showCriterionScores: false,
       showFeedbackText: false,
+      hideFromRejected: false,
     }),
 
   advancementMode: z