Radio show website: light mode fix, headshot, motto update

- Fix hero title/tagline/description text invisible in light mode
- Replace ghost button with accent-bordered outline button for contrast
- Add [data-theme="light"] overrides for hero gradients
- Add Mike Swanson headshot (WebP 11KB + JPEG fallback) to about page and home
- Replace SVG placeholders with real photo (circular crop on about, framed on home)
- Update show motto across all locations

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

projects/radio-show/website/src/pages/feed.xml.ts

@@ -12,7 +12,7 @@ export async function GET(context: APIContext) {
   return rss({
     title: 'The Computer Guru Show',
     description:
-      'Technology: Fun and Simple. Hosted by Mike Swanson from Tucson, Arizona.',
+      'Helping you deal with all of your technology needs while treating you like a person in the process.',
     site: context.site!.toString(),
     items: sortedEpisodes.map((ep) => ({
       title: ep.data.title,