⚡ Bolt: Optimized random sampling and UI responsiveness in random.html

[babelman97]

💡 What: Optimized the unique random number generation in random.html by implementing a hybrid sampling approach (Rejection Sampling + Sparse Fisher-Yates) and improving UI performance.
🎯 Why: The original rejection sampling algorithm suffered from performance collapse (O(N²)) at high densities. Rendering large sets of numbers without layout constraints also caused browser UI hangs.
📊 Impact:

• Execution Speed: Reduced generation time for 999,999 numbers in a 1,000,000 range from ~3.0s to ~0.9s (3.3x speedup).
• UI Responsiveness: Prevented browser layout thrashing and hangs by constraining result display with CSS max-height and overflow-y: auto.
• Bug Fix: Allowed generating numbers when minValue === maxValue.
  🔬 Measurement: Verified using performance.now() in page.evaluate() via Playwright and visual inspection of UI stability.

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PR created automatically by Jules for task 16468726721959087451 started by @babelman97

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