⚡ Improve font loading performance with font-display: swap

[google-labs-jules]

💡 What:

• Changed font-display: fallback to font-display: swap for the 'Cormorant Garamond' font in src/style.css.
• Added a new regression test tests/font-performance.spec.ts to ensure this setting is maintained.

🎯 Why:

• font-display: fallback hides text for up to 100ms if the font is not ready (FOIT - Flash of Invisible Text).
• font-display: swap shows the fallback font immediately and swaps in the custom font once loaded (FOUT - Flash of Unstyled Text). This improves perceived performance and First Contentful Paint (FCP), ensuring the user can read the content immediately even on slower connections.

📊 Measured Improvement:

• Baseline: font-display was confirmed to be fallback via Playwright verification.
• Improvement: font-display is now verified to be swap via Playwright test.
• While exact timing metrics (FCP delta) are difficult to simulate reliably in this environment without network throttling tools, the property change directly maps to the browser behavior described above. The added test confirms the property is correctly applied.

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PR created automatically by Jules for task 7939261234456912839 started by @xRahul

[google-labs-jules]

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