feat(tournament): add participant gave-up functionality and UI updates

- Implemented setParticipantGaveUp and setExternalParticipantGaveUp methods in tournamentController to handle participant resignation.
- Updated ExternalTournamentParticipant and TournamentMember models to include a gaveUp field for tracking resignation status.
- Enhanced tournamentRoutes to include new endpoints for updating gave-up status.
- Modified TournamentGroupsTab and TournamentParticipantsTab components to display and manage gave-up status visually.
- Added localization strings for "gave up" and related hints in German.
- Updated TournamentResultsTab to reflect gave-up status in match results.

backend/controllers/tournamentController.js

@@ -434,6 +434,20 @@ export const updateParticipantSeeded = async (req, res) => {
     }
 };
 
+export const setParticipantGaveUp = async (req, res) => {
+    const { authcode: token } = req.headers;
+    const { clubId, tournamentId, participantId } = req.params;
+    const { gaveUp } = req.body;
+    try {
+        await tournamentService.setParticipantGaveUp(token, clubId, tournamentId, participantId, gaveUp);
+        emitTournamentChanged(clubId, tournamentId);
+        res.status(200).json({ message: 'Aufgabe-Status aktualisiert' });
+    } catch (err) {
+        console.error('[setParticipantGaveUp] Error:', err);
+        res.status(500).json({ error: err.message });
+    }
+};
+
 export const deleteMatchResult = async (req, res) => {
     const { authcode: token } = req.headers;
     const { clubId, tournamentId, matchId, set } = req.body;
@@ -555,6 +569,20 @@ export const updateExternalParticipantSeeded = async (req, res) => {
     }
 };
 
+export const setExternalParticipantGaveUp = async (req, res) => {
+    const { authcode: token } = req.headers;
+    const { clubId, tournamentId, participantId } = req.params;
+    const { gaveUp } = req.body;
+    try {
+        await tournamentService.setExternalParticipantGaveUp(token, clubId, tournamentId, participantId, gaveUp);
+        emitTournamentChanged(clubId, tournamentId);
+        res.status(200).json({ message: 'Aufgabe-Status aktualisiert' });
+    } catch (error) {
+        console.error('[setExternalParticipantGaveUp] Error:', error);
+        res.status(500).json({ error: error.message });
+    }
+};
+
 // Tournament Classes
 export const getTournamentClasses = async (req, res) => {
     const { authcode: token } = req.headers;