feat: filter teams with zero members in admin components

- Updated `AdminClientWrapper` to filter out teams with zero members in `getFilteredTeamStats`.
- Modified `AdminFilters` to only include directions and teams with members in the options.
- Enhanced `AdminService` to generate direction stats based on teams with members, improving data accuracy.

services/admin-service.ts

@@ -166,10 +166,16 @@ export class AdminService {
    * Génère les statistiques par direction à partir des stats d'équipes
    */
   static generateDirectionStats(teamStats: TeamStats[]): DirectionStats[] {
-    const directions = Array.from(new Set(teamStats.map((t) => t.direction)));
+    // Filtrer d'abord les équipes avec 0 membres
+    const teamsWithMembers = teamStats.filter((t) => t.totalMembers > 0);
+    const directions = Array.from(
+      new Set(teamsWithMembers.map((t) => t.direction))
+    );
 
     return directions.map((direction) => {
-      const directionTeams = teamStats.filter((t) => t.direction === direction);
+      const directionTeams = teamsWithMembers.filter(
+        (t) => t.direction === direction
+      );
       const totalMembers = directionTeams.reduce(
         (sum, t) => sum + t.totalMembers,
         0