Observer platform: mobile fixes, data/UX overhaul, animated nav

- Fix dashboard default round selection to target active round instead of R1
- Move edition selector from dashboard header to hamburger menu via shared context
- Add observer-friendly status labels (Not Reviewed / Under Review / Reviewed)
- Fix pipeline completion: closed rounds show 100%, cap all rates at 100%
- Round badge on projects list shows furthest round reached
- Hide scores/evals for projects with zero evaluations
- Enhance project detail round history with pass/reject indicators from ProjectRoundState
- Remove irrelevant fields (Org Type, Budget, Duration) from project detail
- Clickable juror workload with expandable project assignments
- Humanize activity feed with icons and readable messages
- Fix jurors table: responsive card layout on mobile
- Fix criteria chart: horizontal bars for readable labels on mobile
- Animate hamburger menu open/close with CSS grid transition

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

src/app/(observer)/layout.tsx

@@ -1,5 +1,6 @@
 import { requireRole } from '@/lib/auth-redirect'
 import { ObserverNav } from '@/components/layouts/observer-nav'
+import { EditionProvider } from '@/components/observer/observer-edition-context'
 
 export default async function ObserverLayout({
   children,
@@ -10,13 +11,15 @@ export default async function ObserverLayout({
 
   return (
     <div className="min-h-screen bg-background">
-      <ObserverNav
-        user={{
-          name: session.user.name,
-          email: session.user.email,
-        }}
-      />
-      <main className="container-app py-6">{children}</main>
+      <EditionProvider>
+        <ObserverNav
+          user={{
+            name: session.user.name,
+            email: session.user.email,
+          }}
+        />
+        <main className="container-app py-6">{children}</main>
+      </EditionProvider>
     </div>
   )
 }