Add "Sticky Kiosk" setting that stores "Kiosk" mode when activate

- This setting is important to allow creation ofa Home Screen app on iOS/iPadOS
- If kiosk mode is accidentally made sticky, it can be cleared by adding '&kiosk=false` to the URL
- Ctrl-K will now also exit kiosk mode

This adds a `stickyRead` parameter to settings, that means "read it if it's there, but don't write it"

server/scripts/index.mjs

@@ -349,10 +349,20 @@ const updateFullScreenNavigate = () => {
 };
 
 const documentKeydown = (e) => {
-	// don't trigger on ctrl/alt/shift modified key
-	if (e.altKey || e.ctrlKey || e.shiftKey) return false;
 	const { key } = e;
 
+	// Handle Ctrl+K to exit kiosk mode (even when other modifiers would normally be ignored)
+	if (e.ctrlKey && (key === 'k' || key === 'K')) {
+		e.preventDefault();
+		if (settings.kiosk?.value) {
+			settings.kiosk.value = false;
+		}
+		return false;
+	}
+
+	// don't trigger on ctrl/alt/shift modified key for other shortcuts
+	if (e.altKey || e.ctrlKey || e.shiftKey) return false;
+
 	if (document.fullscreenElement || document.activeElement === document.body) {
 		switch (key) {
 			case ' ': // Space

server/scripts/modules/settings.mjs

@@ -26,6 +26,13 @@ const kioskChange = (value) => {
 		window.dispatchEvent(new Event('resize'));
 	} else {
 		body.classList.remove('kiosk');
+		window.dispatchEvent(new Event('resize'));
+	}
+
+	// Conditionally store the kiosk setting based on the "Sticky Kiosk" setting
+	// (Need to check if the method exists to handle initialization race condition)
+	if (settings.kiosk?.conditionalStoreToLocalStorage) {
+		settings.kiosk.conditionalStoreToLocalStorage(value, settings.stickyKiosk?.value);
 	}
 };
 
@@ -95,6 +102,12 @@ const init = () => {
 		defaultValue: false,
 		changeAction: kioskChange,
 		sticky: false,
+		stickyRead: true,
+	});
+	settings.stickyKiosk = new Setting('stickyKiosk', {
+		name: 'Sticky Kiosk',
+		defaultValue: false,
+		sticky: true,
 	});
 	settings.speed = new Setting('speed', {
 		name: 'Speed',

server/scripts/modules/utils/setting.mjs

@@ -9,6 +9,7 @@ const DEFAULTS = {
 	defaultValue: undefined,
 	changeAction: () => { },
 	sticky: true,
+	stickyRead: false,
 	values: [],
 	visible: true,
 };
@@ -28,6 +29,7 @@ class Setting {
 		this.myValue = this.defaultValue;
 		this.type = options?.type;
 		this.sticky = options.sticky;
+		this.stickyRead = options.stickyRead;
 		this.values = options.values;
 		this.visible = options.visible;
 		this.changeAction = options.changeAction;
@@ -51,7 +53,7 @@ class Setting {
 
 		// get existing value if present
 		const storedValue = urlState ?? this.getFromLocalStorage();
-		if ((this.sticky || urlValue !== undefined) && storedValue !== null) {
+		if ((this.sticky || this.stickyRead || urlValue !== undefined) && storedValue !== null) {
 			this.myValue = storedValue;
 		}
 
@@ -154,6 +156,20 @@ class Setting {
 		localStorage?.setItem(SETTINGS_KEY, JSON.stringify(allSettings));
 	}
 
+	// Conditional storage method for stickyRead settings
+	conditionalStoreToLocalStorage(value, shouldStore) {
+		if (!this.stickyRead) return;
+		const allSettingsString = localStorage?.getItem(SETTINGS_KEY) ?? '{}';
+		const allSettings = JSON.parse(allSettingsString);
+
+		if (shouldStore) {
+			allSettings[this.shortName] = value;
+		} else {
+			delete allSettings[this.shortName];
+		}
+		localStorage?.setItem(SETTINGS_KEY, JSON.stringify(allSettings));
+	}
+
 	getFromLocalStorage() {
 		const allSettings = localStorage?.getItem(SETTINGS_KEY);
 		try {