more system tests as login is borked

components/SignUpModal.tsx

@@ -33,18 +33,35 @@ export const SignUpModal: React.FC<SignUpModalProps> = ({ isOpen, onClose, onSwi
     setError(null);
     setMessage(null);
 
-    try {
-      const { error } = await supabase.auth.signUp({
-        email,
-        password,
-        options: { emailRedirectTo: window.location.href }
-      });
-      if (error) throw error;
-      setMessage('Check your email for the confirmation link!');
-    } catch (err: any) {
-      setError(err.message || 'An unexpected error occurred.');
-    } finally {
-      setLoading(false);
+    // Check if there is a current anonymous session
+    const { data: { session } } = await supabase.auth.getSession();
+
+    if (session && session.user.is_anonymous) {
+        // If the user is anonymous, upgrade their account instead of creating a new one.
+        try {
+            const { error } = await supabase.auth.updateUser({ email, password });
+            if (error) throw error;
+            setMessage('Your account has been created! Check your email for a confirmation link.');
+        } catch (err: any) {
+            setError(err.message || 'An unexpected error occurred during account upgrade.');
+        } finally {
+            setLoading(false);
+        }
+    } else {
+        // Standard sign-up flow for new users.
+        try {
+            const { error } = await supabase.auth.signUp({
+                email,
+                password,
+                options: { emailRedirectTo: window.location.href }
+            });
+            if (error) throw error;
+            setMessage('Check your email for the confirmation link!');
+        } catch (err: any) {
+            setError(err.message || 'An unexpected error occurred.');
+        } finally {
+            setLoading(false);
+        }
     }
   };