fix(core): 🐛 default to auto theme unless set

includes/Hooks/SkinHooks.php

@@ -62,7 +62,7 @@ public function onBeforePageDisplay( $out, $skin ): void {
 		$script = sprintf(
 			'<script%s>%s</script>',
 			$nonce !== false ? sprintf( ' nonce="%s"', $nonce ) : '',
-			'window.applyPref=()=>{const a="skin-citizen-",b="skin-citizen-theme",c=a=>window.localStorage.getItem(a),d=c("skin-citizen-theme"),e=()=>{const d={fontsize:"font-size",pagewidth:"--width-layout",lineheight:"--line-height"},e=()=>["auto","dark","light"].map(b=>a+b),f=a=>{let b=document.getElementById("citizen-style");null===b&&(b=document.createElement("style"),b.setAttribute("id","citizen-style"),document.head.appendChild(b)),b.textContent=`:root{${a}}`};try{const g=c(b);let h="";if(null!==g){const b=document.documentElement;b.classList.remove(...e(a)),b.classList.add(a+g)}for(const[b,e]of Object.entries(d)){const d=c(a+b);null!==d&&(h+=`${e}:${d};`)}h&&f(h)}catch(a){}};if("auto"===d){const a=window.matchMedia("(prefers-color-scheme: dark)"),c=a.matches?"dark":"light",d=(a,b)=>window.localStorage.setItem(a,b);d(b,c),e(),a.addEventListener("change",()=>{e()}),d(b,"auto")}else e()},(()=>{window.applyPref()})();'
+			'window.applyPref=()=>{const a="skin-citizen-",b="skin-citizen-theme",c=a=>window.localStorage.getItem(a),d=c("skin-citizen-theme")??"auto",e=()=>{const d={fontsize:"font-size",pagewidth:"--width-layout",lineheight:"--line-height"},e=()=>["auto","dark","light"].map(b=>a+b),f=a=>{let b=document.getElementById("citizen-style");null===b&&(b=document.createElement("style"),b.setAttribute("id","citizen-style"),document.head.appendChild(b)),b.textContent=`:root{${a}}`};try{const g=c(b);let h="";if(null!==g){const b=document.documentElement;b.classList.remove(...e(a)),b.classList.add(a+g)}for(const[b,e]of Object.entries(d)){const d=c(a+b);null!==d&&(h+=`${e}:${d};`)}h&&f(h)}catch(a){}};if("auto"===d){const a=window.matchMedia("(prefers-color-scheme: dark)"),c=a.matches?"dark":"light",d=(a,b)=>window.localStorage.setItem(a,b);d(b,c),e(),a.addEventListener("change",()=>{e()}),d(b,"auto")}else e()},(()=>{window.applyPref()})();'
 		);
 		// phpcs:enable Generic.Files.LineLength.TooLong
 

resources/skins.citizen.scripts/inline.js

@@ -1,9 +1,7 @@
 /*
  * Citizen
- * Inline script used in includes/Hooks/SkinHooks.php
- *
- * https://starcitizen.tools
  *
+ * Inline script used in includes/Hooks/SkinHooks.php
  * Mangle using https://jscompress.com/
  */
 window.applyPref = () => {
@@ -15,7 +13,8 @@ window.applyPref = () => {
 		return window.localStorage.getItem( key );
 	};
 
-	const targetTheme = getStorage( themeKey );
+	// Default to auto if no key is present
+	const targetTheme = getStorage( themeKey ) ?? 'auto';
 
 	const apply = () => {
 		const cssProps = {