New sign-in page and signed-in on-load animation (#3684)

* Basic sign-in page layout

* Better responsive styling

* Add wipe animation

* Fix mobile button styling

* Add juicy on-load animation to logo in app header

* Make video card a link to the sample's code

* Fix video URL on bundled desktop app, add "open default browser" behavior to links

* Revert "Add juicy on-load animation to logo in app header"

This reverts commit c167569d7e.

---------

Co-authored-by: 49fl <ircsurfer33@gmail.com>

src/components/ActionIcon.tsx

@@ -35,7 +35,7 @@ export const ActionIcon = ({
   return (
     <div
       className={
-        `w-fit inline-grid place-content-center ${className} ` +
+        `w-fit self-stretch inline-grid place-content-center ${className} ` +
         computedBgClassName
       }
     >