[BUG] NaN when using Event PT Calculator

[VickyHuang1113]

Describe the bug
First of all, thank you for your outstanding work. It has been incredibly helpful to me.

I’ve encountered an issue while using the Event PT Calculator. Whenever I select any of the World Link events, the result turns into NaN. However, the exact same settings work perfectly fine when I select any other event

I would greatly appreciate any guidance or fixes regarding this issue.

Thank you again for your hard work!

To Reproduce

1. Go to 'event calc'
2. Configure the calculator as shown in the screenshots below:
   

3. Scroll down to 'Step 4. Results'
4. See the error (NaN shown)
   Expected behavior
   The calculator should return valid numeric values, not NaN.

Screenshots

Browser (please complete the following information):

• OS: Windows
• Browser: Chrome
• Sekai Viewer: 1.15.12

Possible cause and/or solution
This might be due to the World Link events having additional logic implemented to support team-related features, which may not be fully completed yet. Some operations specific to support team mechanics might not be properly handled, resulting in a NaN output.

This issue doesn’t have much practical impact, since I can work around it by selecting a non-World Link event and manually adjusting the percentage according to the actual values in WL. I just wanted to report it in case it's helpful for future improvements.

Thanks again for your amazing work, and I really appreciate your time and effort in maintaining this tool!