Add observer project detail page with files, evaluations & reviews

New page at /observer/projects/[projectId] showing project info,
documents grouped by round requirements, and jury evaluations with
click-through to full review details. Dashboard table rows now link
to project detail. Also cleans up redundant programName prefixes
and fixes chart edge cases.

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

src/components/charts/diversity-metrics.tsx

@@ -61,7 +61,7 @@ export function DiversityMetricsChart({ data }: DiversityMetricsProps) {
     : topCountries
 
   const nivoPieData = countryPieData.map((c) => ({
-    id: c.country,
+    id: c.country === 'Others' ? 'Others' : c.country.toUpperCase(),
     label: getCountryName(c.country),
     value: c.count,
   }))