feat: applicant dashboard — team cards, editable description, feedback visibility

- Replace flat team names list with proper cards showing roles and badges
- Hide TeamMembers from metadata display, remove Withdraw from header
- Add inline-editable project description (admin-toggleable setting)
- Move applicant feedback visibility from per-round config to admin settings
- Support EVALUATION, LIVE_FINAL, DELIBERATION round types in feedback
- Backwards-compatible: falls back to old per-round config if no settings exist
- Add observer team tab toggle and 10 new SystemSettings seed entries

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

src/server/routers/settings.ts

@@ -52,6 +52,7 @@ export const settingsRouter = router({
       'applicant_show_livefinal_feedback', 'applicant_show_livefinal_scores',
       'applicant_show_deliberation_feedback',
       'applicant_hide_feedback_from_rejected',
+      'applicant_allow_description_edit',
     ]
     const settings = await ctx.prisma.systemSettings.findMany({
       where: { key: { in: keys } },
@@ -77,6 +78,7 @@ export const settingsRouter = router({
         deliberationEnabled: flag('applicant_show_deliberation_feedback'),
         hideFromRejected: flag('applicant_hide_feedback_from_rejected'),
       },
+      applicantAllowDescriptionEdit: flag('applicant_allow_description_edit'),
     }
   }),