fix: 💄 white foreground on forced black background

Remedies the problem introduced by 020c4f5788 causing black text to appear over a black-ish background

packages/backend/src/server/web/style.css

@@ -5,6 +5,7 @@ html {
 @media (prefers-color-scheme: dark) {
 	html {
 		--bg: rgb(17, 17, 27);
+		--fg: rgb(224, 222, 244);
 	}
 }