fix(TeamManagement): refine eligibility checks and streamline assignment removal

- Adjusted member eligibility comparison logic to ensure correct validation.
- Implemented functions to remove ineligible planning assignments for teams, enhancing data integrity.
- Integrated automatic cleanup of ineligible assignments upon team updates, improving user experience.

frontend/src/views/TeamManagementView.vue

@@ -979,7 +979,7 @@ export default {
       if (memberIndex < 0 || teamIndex < 0) {
         return false;
       }
-      return memberIndex >= teamIndex;
+      return memberIndex <= teamIndex;
     };
 
     const getMemberEligibilityLabel = (member, teamAgeGroup) => {
@@ -1212,6 +1212,7 @@ export default {
         teamAgeGroup: team.teamAgeGroup || 'adult',
         leagueId: team.leagueId || null
       }));
+      removeAllIneligiblePlanningAssignments();
     };
 
     const onPlanningDragMember = (member) => {
@@ -1228,6 +1229,33 @@ export default {
       return isEligibleForTeam(member, teamAgeGroup, teamGender);
     };
 
+    const removeIneligibleAssignmentsForTeam = (teamId) => {
+      const before = planningAssignments.value.length;
+      planningAssignments.value = planningAssignments.value.filter((entry) => (
+        Number(entry.teamId) !== Number(teamId) || isEligibleForPlanningTeam(entry.memberId, entry.teamId)
+      ));
+      if (planningAssignments.value.length !== before) {
+        normalizePlanningTeamAssignments();
+        schedulePlanningTeamAutosave(Number(teamId), 300);
+      }
+    };
+
+    const removeAllIneligiblePlanningAssignments = () => {
+      const allEntries = [...planningAssignments.value];
+      const affectedTeamIds = new Set(
+        allEntries
+          .filter((entry) => !isEligibleForPlanningTeam(entry.memberId, entry.teamId))
+          .map((entry) => Number(entry.teamId))
+      );
+      if (!affectedTeamIds.size) return;
+
+      planningAssignments.value = allEntries.filter((entry) => (
+        isEligibleForPlanningTeam(entry.memberId, entry.teamId)
+      ));
+      normalizePlanningTeamAssignments();
+      affectedTeamIds.forEach((teamId) => schedulePlanningTeamAutosave(teamId, 300));
+    };
+
     const setPlanningTeamStatus = (teamId, state) => {
       const key = String(teamId);
       planningTeamSaveStatus.value = {
@@ -1421,6 +1449,9 @@ export default {
       planningLocalTeams.value = planningLocalTeams.value.map((team) => (
         Number(team.id) === Number(teamId) ? { ...team, [field]: value } : team
       ));
+      if (field === 'teamAgeGroup' || field === 'teamGender') {
+        removeIneligibleAssignmentsForTeam(teamId);
+      }
       schedulePlanningTeamAutosave(Number(teamId));
     };