feat: observer UX overhaul — reports, projects, charts, session & email

- Observer projects: default sort by status (rejected last), sortable status column
- Observer projects: search by country, institution, geographic zone
- Observer project detail: vertical timeline connectors between rounds
- Fix React key warning in ExpandableJurorTable and FilteringReportTabs
- Fix ScoreBadge text always white for better contrast on all backgrounds
- Remove misleading /30 denominator from heatmap juror reviewed count
- INTAKE stats: show Start-ups, Business Concepts, Countries (not States/Categories)
- DiversityMetrics: extractCountry() for country-only display in charts
- Fix nested button hydration error in filtering report mobile view
- Color project titles by outcome in filtering report (green/red/amber)
- Redesign CrossStageComparisonChart: funnel viz + metrics table with attrition %
- Center doughnut chart in StatusBreakdownChart
- Remove redundant RoundTypeStatsCards from evaluation report
- Move evaluation tab bar below overview header, rename to "Juror Assignments"
- Dev email override system (DEV_EMAIL_OVERRIDE env var)
- Session refresh on role change without re-login
- Role switcher in user dropdown menu
- formatCategory() utility for consistent category display
- Activity feed max height constraint

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

src/components/observer/dashboard/previous-round-section.tsx

@@ -7,7 +7,7 @@ import { Badge } from '@/components/ui/badge'
 import { Skeleton } from '@/components/ui/skeleton'
 import { AnimatedCard } from '@/components/shared/animated-container'
 import { ArrowDown, ChevronDown, ChevronUp, TrendingDown } from 'lucide-react'
-import { cn } from '@/lib/utils'
+import { cn, formatCategory } from '@/lib/utils'
 
 export function PreviousRoundSection({ currentRoundId }: { currentRoundId: string }) {
   const [collapsed, setCollapsed] = useState(false)
@@ -76,7 +76,7 @@ export function PreviousRoundSection({ currentRoundId }: { currentRoundId: strin
                   return (
                     <div key={cat.category} className="space-y-1">
                       <div className="flex items-center justify-between text-sm">
-                        <span className="font-medium truncate">{cat.category}</span>
+                        <span className="font-medium truncate">{formatCategory(cat.category)}</span>
                         <span className="text-xs text-muted-foreground tabular-nums">
                           {cat.previous} → {cat.current}
                           <span className="text-rose-500 ml-1">(-{cat.eliminated})</span>