⚡ Bolt: Optimize lightbox with event delegation

[ImChong]

💡 What: Replaced individual click event listeners for [data-lightbox] images with a single delegated event listener on document in js/lightbox.js.
🎯 Why: Previously, the script was executing a querySelectorAll and looping through every matching image to bind an individual click event listener. As the number of images grows, this approach increases memory usage and slows down initial script execution.
📊 Impact: Reduces the number of click event listeners from O(N) to O(1) where N is the number of images. Lowers memory footprint and marginally improves page execution time.
🔬 Measurement: Verify that clicking any image with data-lightbox continues to correctly open the lightbox overlay. Performance profilers will show fewer bound event listeners in the DOM tree.

---

PR created automatically by Jules for task 1176951550313062163 started by @ImChong

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.