web: convert changelogs from old format

https://gist.github.com/dumbmoron/3fc6c0c747d791928aba939976fd9304

web/changelogs/4.8.md

@@ -0,0 +1,30 @@
+---
+title: "prettier than ever"
+banner:
+    file: "catmakeup.webp"
+    alt: "a cat being brushed with a powder makeup brush"
+---
+this version brings many visual improvements and a completely revamped "about" tab.
+
+what's new in "about" tab:
+- all information is now split into collapsible sections, making it easier to navigate.
+- added privacy policy to further prove that none of your data is collected.
+- added emoji to the page title to make it look consistent with other pages.
+- added mastodon account handle and link.
+- there are now short notes at the end of each section.
+- other changes that are too small to describe. just go check it out!
+
+visual improvements:
+- less wasted space: paddings and margins have been reduced and optimized for usability, consistency, and overall beauty.
+- all <a class="text-backdrop link" href="https://youtu.be/dQw4w9WgXcQ" target="_blank">links</a> are now in italic. it's much easier to tell them apart from <span class="text-backdrop">regular highlights</span>.
+- error popup no longer looks broken and out of place.
+- download popup now has a proper close button, not something from 2.x era.
+- emoji are no longer selectable or draggable.
+- better scalability: desktop layout for home screen is shown if device viewport is wide enough to fit in three action buttons.
+- page shouldn't look broken on phones in landscape mode (i still highly recommend using cobalt in portrait mode).
+- removed bulletpoint padding. it was unnecessary.
+- updated some service names.
+
+as always, you can suggest features or report bugs on any platform listed in the "support" section of about tab.
+
+thank you for using cobalt. i hope you have a good day :)