Improve kiosk mode startup experience

- Pass query parameters to EJS template for kiosk mode detection
- Add kiosk class to body when enabled via query parameter
- Simplify kiosk mode CSS to hide all elements except main weather display
- Add null checks for progress object to prevent errors in kiosk mode
- Prevent navigation errors when no suitable displays are available

gulp/publish-frontend.mjs

@@ -138,6 +138,7 @@ const compressHtml = async () => {
 			production: version,
 			version,
 			OVERRIDES,
+			query: {},
 		}))
 		.pipe(rename({ extname: '.html' }))
 		.pipe(htmlmin({ collapseWhitespace: true }))