Fix text appearing grey while printing in dark mode

It was the caused by the different foreground and background
contrast between the light mode and dark mode.
This commit forces the light mode foreground and background to be used
when printing.

src/common/gui/main-styles.ts

@@ -9,6 +9,7 @@ import { BrowserType } from "../misc/ClientConstants"
 import { stateBgActive, stateBgFocus, stateBgHover, stateBgLike } from "./builtinThemes.js"
 import { FontIcons } from "./base/icons/FontIcons.js"
 import { DefaultAnimationTime } from "./animation/Animations.js"
+import { locator } from "../api/main/CommonLocator.js"
 
 assertMainOrNode()
 
@@ -36,6 +37,7 @@ const searchBarShadow = "0px 2px 4px rgb(0, 0, 0, 0.12)"
 
 const scrollbarWidthHeight = px(18)
 styles.registerStyle("main", () => {
+	const lightTheme = locator.themeController.getBaseTheme("light")
 	return {
 		"#link-tt": isElectronClient()
 			? {
@@ -2491,6 +2493,8 @@ styles.registerStyle("main", () => {
 			"html, body": {
 				position: "initial",
 				overflow: "visible !important",
+				color: lightTheme.content_fg,
+				"background-color": `${lightTheme.content_bg} !important`,
 			},
 			// overwrite position "fixed" otherwise only one page will be printed.
 			".header-nav": {