azuanalias92/solar-calculator ? reverse-engineered prompt

Build me a clean responsive web app called Kira Solar that helps homeowners estimate a DIY solar setup. It should let users add their appliances, calculate daily energy use, and suggest how many solar panels they might need. I also want a separate page for tracking monthly EV charging versus normal home usage, plus a tariff rates page that shows current TNB rates for a selected date.

Make it support English and Malay, with a simple language switcher and locale based routes. Add Google sign in, store the session on the client, and save calculator data and EV usage to the backend when the user is logged in. Include a way to export the results as a detailed PDF report.

Keep the design modern, mobile friendly, and easy to use, with form validation and nice reusable UI components. If you need current library details or docs, look them up online and use the latest best practice.