[TASK] Quick update & review of all pages' OpenGraph metadata

[yuri-xyz]

Go through all the dApp pages and ensure that its OpenGraph metadata is up to date and that it accurately describes what each page does. This is useful for when embedding links in Telegram and other places. Some pages might be out of date, or might be missing it entirely.

[yuri-xyz]

CC @monaiuu Do we happen to have updated thumbnails for the pages?

[yuri-xyz]

Update on this issue: Since we migrated to Vite.js, I was doing some research on going about defining metadata for Vite.js applications. There's the react-helmet package which hoists metadata tags up to the head element, so that seemed like the way to go. However, that approach may not work with sites like Twitter/Telegram, since it's client-side JavaScript and not SSR'ed HTML.

I did notice that Vite.js supports SSR, but it may overkill to enable it just for OpenGraph meta tags?

For those reasons I'm postponing this issue until later on, as a better solution is needed.