Review & Fixes Applied

I've rebased this PR onto main and applied the following consistency fixes:

1. Added requestAnimationFrame to observability_resources.html

The other observability templates (observability_metrics.html, observability_tools.html, observability_prompts.html) wrap chart creation in requestAnimationFrame() with visibility checks to prevent canvas rendering issues. This was missing from observability_resources.html.

Files affected: observability_resources.html

• renderResourceUsageChart()
• renderResourceSlownessChart()
• renderResourceErrorProneChart()

2. Replaced hardcoded inline styles with Tailwind classes and safe DOM manipulation

The "no errors found" success messages used inline styles with hardcoded colors:

// Before
parent.innerHTML = '<p style="text-align: center; color: #10b981; padding: 2rem;">✓ No errors found...</p>';

// After - uses Tailwind classes and safe DOM manipulation
parent.textContent = '';
const p = document.createElement('p');
p.className = 'text-center text-emerald-500 p-8';
p.textContent = '✓ No errors found...';
parent.appendChild(p);

Files affected:

• observability_resources.html
• observability_tools.html
• observability_prompts.html

Tests

All 5295 tests pass after these changes.