feat(FalukantService): update election filtering to include future dates and enhance eligibility checks

- Modified the election query to filter for upcoming election dates instead of past ones, ensuring only future positions are considered.
- Added checks for prerequisites in election eligibility, allowing positions without prerequisites to be selectable, improving user experience in the application.

backend/services/falukantService.js

@@ -6907,10 +6907,12 @@ class FalukantService extends BaseService {
         ];
         const allTypes = await PoliticalOfficeType.findAll({ attributes: ['id', 'name'] });
         const nameToId = Object.fromEntries(allTypes.map(t => [t.name, t.id]));
+        const now = new Date();
         const openPositions = await Election.findAll({
             where: {
                 regionId: { [Op.in]: regionIds },
-                date: { [Op.lt]: new Date() }
+                // "Anstehende Neuwahl-Positionen": nur zukünftige/kommende Wahltermine
+                date: { [Op.gte]: now }
             },
             include: [
                 {
@@ -6941,6 +6943,8 @@ class FalukantService extends BaseService {
             })
             .filter(election => {
                 const prereqs = election.officeType.prerequisites || [];
+                // Wenn es keine Voraussetzungen gibt, ist die Position grundsätzlich wählbar.
+                if (!Array.isArray(prereqs) || prereqs.length === 0) return true;
                 return prereqs.some(pr => {
                     const jobs = pr.prerequisite.jobs;
                     if (!Array.isArray(jobs) || jobs.length === 0) return true;
@@ -6972,7 +6976,6 @@ class FalukantService extends BaseService {
                     canApplyByAge
                 };
             })
-            .filter(election => !election.alreadyApplied); // Nur Positionen ohne bestehende Bewerbung
         return result;
     }