fix(ui): remove early return to render theme-aware favicon immediately

The previous implementation returned null when config was not yet loaded,
preventing the theme-aware favicon from rendering during initial page load.

Now uses optional chaining (config?.metaTitle, config?.customCss) throughout
so the <link rel="icon"> always renders with the correct theme-aware favicon
regardless of config loading state.

Fixes P1 issue from code review.

apps/dokploy/components/proprietary/whitelabeling/whitelabeling-provider.tsx

@@ -16,16 +16,14 @@ export function WhitelabelingProvider() {
 		: resolvedTheme === "light" ? "/icon-light.svg"
 		: "/icon.svg");
 
-	if (!config) return null;
-
 	return (
 		<>
 			<Head>
-				{config.metaTitle && <title>{config.metaTitle}</title>}
+				{config?.metaTitle && <title>{config.metaTitle}</title>}
 				<link rel="icon" href={faviconHref} key="app-favicon" />
 			</Head>
 
-			{config.customCss && (
+			{config?.customCss && (
 				<style
 					id="whitelabeling-styles"
 					dangerouslySetInnerHTML={{