⚡ Bolt: Optimized PDF rendering loop

💡 What:

• Hoisted escapeHtml utility function to global scope.
• Updated renderPDFs to calculate now and searchRegex (from searchInput.value) once per render cycle, instead of for every PDF card.
• Updated createPDFCard to accept these pre-calculated values, removing redundant new Date() calls, document.getElementById queries, and new RegExp compilations.

🎯 Why:

• The previous implementation accessed the DOM (document.getElementById) and created new RegExp and Date objects for every single card in the list during a search or render.
• For a list of N items, this resulted in N DOM reads, 2N RegExp creations, and N Date object creations.
• This optimization reduces this to 1 DOM read, 1 RegExp creation, and 1 Date object creation per render, significantly improving performance for large lists and smoother search filtering.

📊 Impact:

• Reduces DOM access and object allocation overhead by factor of N (where N is number of PDFs).
• Expected to make search input responsiveness snappier on lower-end devices.

🔬 Measurement:

• Verified functionality using a Playwright script (verification_search.png) confirming that search highlighting and "NEW" badge logic remain correct.
• Verified syntax with node -c script.js.

PR created automatically by Jules for task 15161736415482662905 started by @MrAlokTech