fix: restore WeatherAverageBar component in session header and adjust styling

Reintroduced the WeatherAverageBar component in the WeatherSessionPage to display team averages. Updated the styling of the WeatherAverageBar for improved spacing. Enhanced the EvolutionIndicator component to use dynamic background colors for better visibility of status indicators.

src/app/weather/[id]/page.tsx

@@ -72,9 +72,6 @@ export default async function WeatherSessionPage({ params }: WeatherSessionPageP
             </span>
           </div>
         </div>
-
-        {/* team average — auto-refreshes via router.refresh() from useLive */}
-        <WeatherAverageBar entries={session.entries} />
       </div>
 
       {/* Info sur les catégories */}
@@ -90,6 +87,7 @@ export default async function WeatherSessionPage({ params }: WeatherSessionPageP
         canEdit={session.canEdit}
         userTeams={userTeams}
       >
+        <WeatherAverageBar entries={session.entries} />
         <WeatherBoard
           sessionId={session.id}
           currentUserId={authSession.user.id}