feat: semi-finalist tracker dashboard, account reminders, search + UX fixes

- Add getSemiFinalistStats query with per-category/per-award breakdown
- Add sendAccountReminders mutation with invite token generation and dedup
- Add SemiFinalistTracker dashboard widget with progress bars and remind buttons
- Add ACCOUNT_REMINDER email template
- Extend project search to match team member name/email (7 locations)
- Fix Passed count deduplication: count distinct projects, not round-state rows
- Fix role switcher: visible pills above user section, auto-refresh session on mount

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

src/server/routers/file.ts

@@ -1008,6 +1008,8 @@ export const fileRouter = router({
         projectWhere.OR = [
           { title: { contains: input.search, mode: 'insensitive' } },
           { teamName: { contains: input.search, mode: 'insensitive' } },
+          { teamMembers: { some: { user: { name: { contains: input.search, mode: 'insensitive' } } } } },
+          { teamMembers: { some: { user: { email: { contains: input.search, mode: 'insensitive' } } } } },
         ]
       }
 
@@ -1317,6 +1319,8 @@ export const fileRouter = router({
         projectWhere.OR = [
           { title: { contains: input.search, mode: 'insensitive' } },
           { teamName: { contains: input.search, mode: 'insensitive' } },
+          { teamMembers: { some: { user: { name: { contains: input.search, mode: 'insensitive' } } } } },
+          { teamMembers: { some: { user: { email: { contains: input.search, mode: 'insensitive' } } } } },
         ]
       }