Add member gallery generation feature in backend and frontend

This commit introduces a new API endpoint for generating a member gallery, allowing users to retrieve a composite image of active members' latest images. The backend has been updated with a new method in MemberService to handle gallery creation, while the frontend has been enhanced with a dialog for displaying the generated gallery. This feature improves the user experience by providing a visual representation of club members.

backend/controllers/memberController.js

@@ -116,6 +116,23 @@ const deleteMemberImage = async (req, res) => {
     }
 };
 
+const generateMemberGallery = async (req, res) => {
+    try {
+        const { clubId } = req.params;
+        const { authcode: userToken } = req.headers;
+        const result = await MemberService.generateMemberGallery(userToken, clubId);
+        if (result.status === 200) {
+            res.setHeader('Content-Type', 'image/png');
+            res.setHeader('Cache-Control', 'no-store');
+            return res.status(200).send(result.buffer);
+        }
+        return res.status(result.status).json({ error: result.error || 'Galerie konnte nicht erstellt werden' });
+    } catch (error) {
+        console.error('[generateMemberGallery] - Error:', error);
+        res.status(500).json({ error: 'Failed to generate member gallery' });
+    }
+};
+
 const setPrimaryMemberImage = async (req, res) => {
     try {
         const { clubId, memberId, imageId } = req.params;
@@ -209,5 +226,6 @@ export {
     quickUpdateMemberFormHandedOver,
     quickDeactivateMember,
     deleteMemberImage,
-    setPrimaryMemberImage
+    setPrimaryMemberImage,
+    generateMemberGallery
 };