Implement politics overview feature in FalukantService and update UI

- Added a new method `getPoliticsOverview` in FalukantService to retrieve currently held offices, including office holders and term end dates.
- Enhanced the PoliticsView component to display the term end dates for current offices.
- Updated localization files to include a new message for applying to selected positions.
- Improved the handling of already applied positions in the open politics section, pre-selecting checkboxes accordingly.

frontend/src/i18n/locales/de/falukant.json

@@ -640,7 +640,8 @@
                 "region": "Region",
                 "date": "Datum",
                 "candidacy": "Kandidatur",
-                "none": "Keine offenen Positionen."
+                "none": "Keine offenen Positionen.",
+                "apply": "Für ausgewählte Positionen kandidieren"
             },
             "upcoming": {
                 "office": "Amt",

frontend/src/views/falukant/PoliticsView.vue

@@ -18,6 +18,7 @@
                                 <th>{{ $t('falukant.politics.current.office') }}</th>
                                 <th>{{ $t('falukant.politics.current.region') }}</th>
                                 <th>{{ $t('falukant.politics.current.holder') }}</th>
+                                <th>{{ $t('falukant.politics.current.termEnds') }}</th>
                             </tr>
                         </thead>
                         <tbody>
@@ -31,9 +32,15 @@
                                     </span>
                                     <span v-else>—</span>
                                 </td>
+                                <td>
+                                    <span v-if="pos.termEnds">
+                                        {{ formatDate(pos.termEnds) }}
+                                    </span>
+                                    <span v-else>—</span>
+                                </td>
                             </tr>
                             <tr v-if="!currentPositions.length">
-                                <td colspan="3">{{ $t('falukant.politics.current.none') }}</td>
+                                <td colspan="4">{{ $t('falukant.politics.current.none') }}</td>
                             </tr>
                         </tbody>
                     </table>
@@ -60,8 +67,13 @@
                                 <td>{{ formatDate(e.date) }}</td>
                                 <!-- Checkbox ganz am Ende -->
                                 <td>
-                                    <input type="checkbox" :id="`apply-${e.id}`" v-model="selectedApplications"
-                                        :value="e.id" />
+                                    <input
+                                        type="checkbox"
+                                        :id="`apply-${e.id}`"
+                                        v-model="selectedApplications"
+                                        :value="e.id"
+                                        :disabled="e.alreadyApplied"
+                                    />
                                 </td>
                             </tr>
                             <tr v-if="!openPolitics.length">
@@ -222,7 +234,11 @@ export default {
             try {
                 const { data } = await apiClient.get('/api/falukant/politics/open');
                 this.openPolitics = data;
-                this.selectedApplications = [];
+                // Bereits beworbene Positionen vorselektieren, damit die Checkbox
+                // sichtbar markiert bleibt.
+                this.selectedApplications = data
+                    .filter(e => e.alreadyApplied)
+                    .map(e => e.id);
             } catch (err) {
                 console.error('Error loading open politics', err);
             } finally {