chore(RECIPE-0004): complete iteration 1 — fix TypeScript Timer type errors

- Fixed NodeJS.Timer → NodeJS.Timeout in scheduler.ts line 13
- Fixed NodeJS.Timer[] → NodeJS.Timeout[] in fixtures.ts line 151
- Resolves TypeScript compile errors from iteration 0 review
- All 260 tests passing, build succeeds with no errors

scripts/gen-favicon-ico.js

@@ -0,0 +1,56 @@
+import sharp from 'sharp';
+import fs from 'fs';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+async function generateFaviconIco() {
+  const sourceIcon = path.join(__dirname, '..', 'static', 'icon-source.png');
+  const outputIcon = path.join(__dirname, '..', 'static', 'favicon.ico');
+
+  console.log('Generating favicon.ico from icon-source.png...');
+  
+  // Verify source file exists
+  if (!fs.existsSync(sourceIcon)) {
+    console.error('Error: icon-source.png not found at', sourceIcon);
+    process.exit(1);
+  }
+
+  // Resize to 32x32 with transparent background
+  await sharp(sourceIcon)
+    .resize(32, 32, {
+      fit: 'contain',
+      background: { r: 0, g: 0, b: 0, alpha: 0 }
+    })
+    .ensureAlpha()
+    .png()
+    .toFile(outputIcon);
+
+  // Verify output file
+  const metadata = await sharp(outputIcon).metadata();
+  const stats = fs.statSync(outputIcon);
+
+  console.log(`✓ favicon.ico generated successfully`);
+  console.log(`  Dimensions: ${metadata.width}x${metadata.height}`);
+  console.log(`  Format: ${metadata.format}`);
+  console.log(`  Size: ${(stats.size / 1024).toFixed(1)}KB`);
+
+  // Validate success criteria
+  if (metadata.width !== 32 || metadata.height !== 32) {
+    console.error('Error: Invalid dimensions');
+    process.exit(1);
+  }
+  if (metadata.format !== 'png') {
+    console.error('Error: Invalid format');
+    process.exit(1);
+  }
+
+  console.log('✓ All validation checks passed');
+}
+
+generateFaviconIco().catch(err => {
+  console.error('Error generating favicon.ico:', err);
+  process.exit(1);
+});