Add tournament update functionality and enhance UI for tournament management

This commit introduces the ability to update tournament details, including name and date, in the backend and frontend. The new `updateTournament` method is added to the `tournamentController` and `tournamentService`, allowing for validation and error handling. The frontend `TournamentsView` is updated to include input fields for editing tournament details, with real-time updates reflected in the UI. Additionally, new CSS styles are introduced for improved layout and user interaction, enhancing the overall experience in tournament management.

backend/controllers/tournamentController.js

@@ -135,6 +135,23 @@ export const getTournament = async (req, res) => {
     }
 };
 
+// Update Turnier
+export const updateTournament = async (req, res) => {
+    const { authcode: token } = req.headers;
+    const { clubId, tournamentId } = req.params;
+    const { name, date } = req.body;
+    try {
+        const tournament = await tournamentService.updateTournament(token, clubId, tournamentId, name, date);
+        // Emit Socket-Event
+        emitTournamentChanged(clubId, tournamentId);
+        res.status(200).json(tournament);
+    } catch (error) {
+        console.error('[updateTournament] Error:', error);
+        const status = error.message.includes('existiert bereits') ? 400 : 500;
+        res.status(status).json({ error: error.message });
+    }
+};
+
 // 10. Alle Spiele eines Turniers abfragen
 export const getTournamentMatches = async (req, res) => {
     const { authcode: token } = req.headers;