perf: improve Lighthouse performance score

Fix render blocking and layout shift issues:
- Make Google Fonts non-blocking with font-display: swap
- Inline critical font-face declaration to prevent FOIT
- Add fetchpriority='high' and loading='eager' to hero LCP image
- Remove lazy loading from above-the-fold content

Expected improvements:
- CLS: reduced layout shift from web font loading
- FCP/LCP: faster by removing render-blocking fonts (saves ~840ms)
- Performance score: should improve from 81 to 90+

Remaining optimizations can be done later:
- Minify JavaScript (173 KB)
- Reduce unused JavaScript (295 KB)
- These require more complex bundling optimizations

src/layouts/BaseLayout.astro

@@ -168,10 +168,17 @@ const fullCanonicalUrl = canonicalUrl || `${siteUrl}${Astro.url.pathname}`;
 
 		<link rel="preconnect" href="https://fonts.googleapis.com" />
 		<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
-		<link
-			href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap"
-			rel="stylesheet"
-		/>
+
+		<style>
+			@font-face {
+				font-family: 'Inter';
+				font-style: normal;
+				font-weight: 400 800;
+				font-display: swap;
+				src: url(https://fonts.gstatic.com/s/inter/v13/UcCO3FwrK3iLTeHuS_fvQtMwCp50KnMw2boKoduKmMEVuLyfAZ9hiA.woff2) format('woff2');
+				unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
+			}
+		</style>
 
 		<link rel="icon" type="image/x-icon" href="/favicon.ico" />
 		<link rel="manifest" href="/manifest.json" />