Fix mobile overflow, logo nav, round activation, compare projects setting

- Fix assignments page header overflow on mobile (flex-wrap)
- Hide 'Back to Dashboard' button on mobile (logo tap navigates home)
- Make logo/brand text clickable to navigate to role dashboard
- Snap windowOpenAt to now when manually activating a round early
- Gate Compare Projects cards behind jury_compare_enabled setting (defaults off)
- Expose jury_compare_enabled in getFeatureFlags tRPC procedure

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

src/components/layouts/role-nav.tsx

@@ -64,10 +64,10 @@ export function RoleNav({ navigation, roleName, user, basePath, statusBadge }: R
       <div className="container-app">
         <div className="flex h-16 items-center justify-between">
           {/* Logo */}
-          <div className="flex items-center gap-3">
+          <Link href={basePath as any} className="flex items-center gap-3">
             <Logo showText textSuffix={roleName} />
             {statusBadge}
-          </div>
+          </Link>
 
           {/* Desktop nav */}
           <nav className="hidden md:flex items-center gap-1">