feat(memberController, memberRoutes, MembersView): implement Click-TT player registration feature

- Added a new endpoint for Click-TT player registration in memberController, allowing submission of existing player applications.
- Integrated the new endpoint into memberRoutes for handling requests.
- Updated MembersView to include a button for initiating Click-TT registration, with user confirmation and loading state management.
- Enhanced UI feedback for registration status, improving user experience during the application process.

backend/controllers/memberController.js

@@ -1,5 +1,6 @@
 import MemberService from "../services/memberService.js";
 import MemberTransferService from "../services/memberTransferService.js";
+import clickTtPlayerRegistrationService from "../services/clickTtPlayerRegistrationService.js";
 import { emitMemberChanged } from '../services/socketService.js';
 
 import { devLog } from '../utils/logger.js';
@@ -207,6 +208,28 @@ const quickDeactivateMember = async (req, res) => {
     }
 };
 
+const requestClickTtPlayerRegistration = async (req, res) => {
+    try {
+        const { clubId, memberId } = req.params;
+        const { authcode: userToken } = req.headers;
+        const userId = req.user?.id;
+        const result = await clickTtPlayerRegistrationService.submitExistingPlayerApplication({
+            userToken,
+            userId,
+            clubId,
+            memberId
+        });
+        res.status(200).json(result);
+    } catch (error) {
+        console.error('[requestClickTtPlayerRegistration] - Error:', error);
+        res.status(error.statusCode || error.status || 500).json({
+            success: false,
+            error: error.message || 'Click-TT-Antrag konnte nicht eingereicht werden',
+            trace: Array.isArray(error.trace) ? error.trace : []
+        });
+    }
+};
+
 const transferMembers = async (req, res) => {
     try {
         const { id: clubId } = req.params;
@@ -251,7 +274,8 @@ export {
     quickUpdateTestMembership,
     quickUpdateMemberFormHandedOver,
     quickDeactivateMember,
+    requestClickTtPlayerRegistration,
     deleteMemberImage,
     setPrimaryMemberImage,
     generateMemberGallery
-};
+};