⚡ Bolt: Optimize Hero Image Loading with sizes

[topherchris420]

💡 What: Added sizes attribute to the hero image in pages/index.js.
🎯 Why: Without sizes, Next.js defaults to 100vw, causing browsers to download unnecessarily large images (e.g. full desktop width) for a component capped at 640px. This significantly impacts LCP and bandwidth.
📊 Impact: drastically reduces image size on desktop (from potentially 1920w+ to 640w), improving load time and LCP.
🔬 Measurement: Verified via Playwright script that the sizes attribute is correctly applied as (max-width: 680px) calc(100vw - 2.5rem), 640px.

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PR created automatically by Jules for task 12197052601870559408 started by @topherchris420

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