fix: correct path construction for light theme logo

Fix the logo path to correctly insert 'lightTheme/' directory in the
right position within the assets path.

Before (wrong): lightTheme/./assets/branding/che-logo.svg
After (correct): ./assets/branding/lightTheme/che-logo.svg

The branding.logoFile already includes the './assets/branding/' prefix,
so we need to replace it with './assets/branding/lightTheme/' for light
mode, not prepend 'lightTheme/' to the entire path.

Assisted-by: Claude Sonnet 4.5
Signed-off-by: Oleksii Orel <oorel@redhat.com>

Author: olexii4

.image-tag

@@ -1 +1 @@
-pr-1452-06
+pr-1452-07

packages/dashboard-frontend/src/Layout/index.tsx

@@ -113,9 +113,10 @@ const LayoutComponent: React.FC<Props> = props => {
   const { history, branding, dashboardLogo } = props;
 
   // Use light theme logo for light mode, default logo for dark mode
+  // branding.logoFile is already prefixed with './assets/branding/'
   const logoFile = isDarkTheme
     ? branding.logoFile
-    : `lightTheme/${branding.logoFile}`;
+    : branding.logoFile.replace('./assets/branding/', './assets/branding/lightTheme/');
 
   const logoSrc = buildLogoSrc(dashboardLogo, logoFile);