User already exists message is red. Modals to the viewport center. Fixed Quit option: it deletes the session.

server/src/routes/sessions.ts

@@ -81,6 +81,16 @@ router.post('/', async (req: any, res) => {
             return res.json(updated);
         } else {
             // Create
+            // If creating a new active session (endTime is null), check if one already exists
+            if (!end) {
+                const active = await prisma.workoutSession.findFirst({
+                    where: { userId, endTime: null }
+                });
+                if (active) {
+                    return res.status(400).json({ error: 'An active session already exists' });
+                }
+            }
+
             const created = await prisma.workoutSession.create({
                 data: {
                     id, // Use provided ID or let DB gen? Frontend usually generates UUIDs.
@@ -282,7 +292,7 @@ router.post('/active/log-set', async (req: any, res) => {
                         break;
                     }
                 }
-                
+
                 const mappedNewSet = {
                     ...newSet,
                     exerciseName: newSet.exercise.name,
@@ -299,7 +309,7 @@ router.post('/active/log-set', async (req: any, res) => {
             exerciseName: newSet.exercise.name,
             type: newSet.exercise.type
         };
-        
+
         res.json({ success: true, newSet: mappedNewSet, activeExerciseId: null });
 
     } catch (error) {
@@ -381,23 +391,14 @@ router.delete('/active', async (req: any, res) => {
     try {
         const userId = req.user.userId;
 
-        // Find active session
-        const activeSession = await prisma.workoutSession.findFirst({
+        // Delete all active sessions for this user to ensure clean state
+        await prisma.workoutSession.deleteMany({
             where: {
                 userId,
                 endTime: null
             }
         });
 
-        if (!activeSession) {
-            return res.json({ success: true, message: 'No active session found' });
-        }
-
-        // Delete the session (cascade will delete sets)
-        await prisma.workoutSession.delete({
-            where: { id: activeSession.id }
-        });
-
         res.json({ success: true });
     } catch (error) {
         console.error(error);