feat(ClubSettings): add country and state code fields for regional calendar data

- Introduced `countryCode` and `stateCode` fields in the Club model to support regional calendar data.
- Updated ClubSettings component to allow users to select their country and state, enhancing the configuration options for clubs.
- Enhanced the ClubService to handle normalization of country and state codes during updates.
- Added new routes and middleware to support the training cancellation feature and calendar integration in the backend.
- Updated frontend navigation to include a calendar link, improving user access to scheduling features.

backend/controllers/calendarController.js

@@ -0,0 +1,20 @@
+import calendarHolidayService from '../services/calendarHolidayService.js';
+
+export const getClubCalendarDays = async (req, res) => {
+  try {
+    const { authcode: token } = req.headers;
+    const { clubId } = req.params;
+    const { year } = req.query;
+    const result = await calendarHolidayService.getClubCalendarDays(token, clubId, year);
+    res.status(200).json(result);
+  } catch (error) {
+    if (error.message === 'clubnotfound') {
+      res.status(404).json({ error: 'clubnotfound' });
+    } else if (error.message === 'noaccess') {
+      res.status(403).json({ error: 'noaccess' });
+    } else {
+      console.error('[getClubCalendarDays] - error:', error);
+      res.status(502).json({ error: 'calendarproviderfailed' });
+    }
+  }
+};

backend/controllers/clubsController.js

@@ -65,6 +65,8 @@ export const updateClubSettings = async (req, res) => {
       associationMemberNumber,
       myTischtennisFedNickname,
       autoFetchRankings,
+      countryCode,
+      stateCode,
       memberDataQualityRequirements
     } = req.body;
     const updated = await ClubService.updateClubSettings(token, clubid, {
@@ -72,6 +74,8 @@ export const updateClubSettings = async (req, res) => {
       associationMemberNumber,
       myTischtennisFedNickname,
       autoFetchRankings,
+      countryCode,
+      stateCode,
       memberDataQualityRequirements
     });
     res.status(200).json(updated);

backend/controllers/trainingCancellationController.js

@@ -0,0 +1,49 @@
+import trainingCancellationService from '../services/trainingCancellationService.js';
+import { getSafeErrorMessage } from '../utils/errorUtils.js';
+
+export const getTrainingCancellations = async (req, res) => {
+  try {
+    const { authcode: userToken } = req.headers;
+    const { clubId } = req.params;
+    const { year } = req.query;
+    const result = await trainingCancellationService.getTrainingCancellations(userToken, clubId, year);
+    res.status(200).json(result);
+  } catch (error) {
+    console.error('[getTrainingCancellations] - Error:', error);
+    const message = getSafeErrorMessage(error, 'Fehler beim Laden der Trainingsausfälle');
+    res.status(error.statusCode || 500).json({ error: message });
+  }
+};
+
+export const upsertTrainingCancellation = async (req, res) => {
+  try {
+    const { authcode: userToken } = req.headers;
+    const { clubId } = req.params;
+    const { date, startDate, endDate, reason } = req.body;
+    const result = await trainingCancellationService.upsertTrainingCancellation(
+      userToken,
+      clubId,
+      startDate || date,
+      reason,
+      endDate || date || startDate
+    );
+    res.status(200).json(result);
+  } catch (error) {
+    console.error('[upsertTrainingCancellation] - Error:', error);
+    const message = getSafeErrorMessage(error, 'Fehler beim Speichern des Trainingsausfalls');
+    res.status(error.statusCode || 500).json({ error: message });
+  }
+};
+
+export const deleteTrainingCancellation = async (req, res) => {
+  try {
+    const { authcode: userToken } = req.headers;
+    const { clubId, cancellationId } = req.params;
+    const result = await trainingCancellationService.deleteTrainingCancellation(userToken, clubId, cancellationId);
+    res.status(200).json(result);
+  } catch (error) {
+    console.error('[deleteTrainingCancellation] - Error:', error);
+    const message = getSafeErrorMessage(error, 'Fehler beim Löschen des Trainingsausfalls');
+    res.status(error.statusCode || 500).json({ error: message });
+  }
+};