thecodetech/lbs-invitation ? reverse-engineered prompt

Build me a small browser based invitation generator for LBS Vadodara that uses one fixed invitation design and lets me personalize it for each visitor.

I want to enter meeting details like the date, time, venue, and an optional occasion, then add visitor names one by one or import them from a CSV file. The app should show a live preview of the selected invitation, update instantly when I edit the details, and save my work in the browser so it does not disappear after refresh.

I also want to download a single invitation as a PDF or PNG, open WhatsApp with a ready made message for that visitor, and generate everything in bulk as either a ZIP of PDFs, a ZIP of PNGs, or one combined PDF with one page per visitor.

Keep everything running locally in the browser, and make the layout simple and easy to use. If you need current docs for any library, look them up online first.