Todo/scripts/generate-png-icons.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>PWA Icon Generator</title>
  <style>
    body {
      font-family: system-ui, -apple-system, sans-serif;
      max-width: 800px;
      margin: 40px auto;
      padding: 20px;
      background: #f5f5f5;
    }
    .container {
      background: white;
      padding: 30px;
      border-radius: 8px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    }
    h1 {
      color: #3B82F6;
      margin-top: 0;
    }
    .icon-preview {
      display: flex;
      gap: 20px;
      margin: 20px 0;
      flex-wrap: wrap;
    }
    .icon-item {
      text-align: center;
    }
    canvas {
      border: 1px solid #ddd;
      border-radius: 4px;
      display: block;
      margin: 10px 0;
    }
    button {
      background: #3B82F6;
      color: white;
      border: none;
      padding: 10px 20px;
      border-radius: 4px;
      cursor: pointer;
      font-size: 14px;
      margin: 5px;
    }
    button:hover {
      background: #2563EB;
    }
    .instructions {
      background: #f0f9ff;
      border-left: 4px solid #3B82F6;
      padding: 15px;
      margin: 20px 0;
    }
    .success {
      color: #059669;
      font-weight: 500;
    }
  </style>
</head>
<body>
  <div class="container">
    <h1>🎨 Ultimate Lists PWA Icon Generator</h1>
    
    <div class="instructions">
      <strong>Instructions:</strong>
      <ol>
        <li>Click "Generate All Icons" below</li>
        <li>Click each "Download" button to save the PNG files</li>
        <li>Save the files to your <code>public/</code> directory with the exact names shown</li>
        <li>Refresh your PWA to see the new icons</li>
      </ol>
    </div>

    <button onclick="generateAllIcons()" style="font-size: 16px; padding: 12px 24px;">
      Generate All Icons
    </button>

    <div id="icons" class="icon-preview"></div>
  </div>

  <script>
    function drawIcon(canvas, size) {
      const ctx = canvas.getContext('2d');
      const scale = size / 512;
      
      // Clear canvas
      ctx.clearRect(0, 0, size, size);
      
      // Draw rounded rectangle background
      const cornerRadius = size * 0.25;
      ctx.fillStyle = '#3B82F6';
      ctx.beginPath();
      ctx.roundRect(0, 0, size, size, cornerRadius);
      ctx.fill();
      
      // Draw checkmark
      ctx.strokeStyle = 'white';
      ctx.lineWidth = size * 0.08;
      ctx.lineCap = 'round';
      ctx.lineJoin = 'round';
      
      ctx.beginPath();
      ctx.moveTo(size * 0.3, size * 0.5);
      ctx.lineTo(size * 0.45, size * 0.65);
      ctx.lineTo(size * 0.7, size * 0.35);
      ctx.stroke();
      
      // Draw list lines
      ctx.fillStyle = 'white';
      
      // First line
      const line1X = size * 0.25;
      const line1Y = size * 0.6;
      const line1Width = size * 0.5;
      const line1Height = size * 0.08;
      const lineRadius = size * 0.02;
      
      ctx.beginPath();
      ctx.roundRect(line1X, line1Y, line1Width, line1Height, lineRadius);
      ctx.fill();
      
      // Second line
      const line2X = size * 0.25;
      const line2Y = size * 0.72;
      const line2Width = size * 0.4;
      const line2Height = size * 0.08;
      
      ctx.beginPath();
      ctx.roundRect(line2X, line2Y, line2Width, line2Height, lineRadius);
      ctx.fill();
    }

    function downloadCanvas(canvas, filename) {
      const link = document.createElement('a');
      link.download = filename;
      link.href = canvas.toDataURL('image/png');
      link.click();
    }

    function createIconElement(size, filename) {
      const div = document.createElement('div');
      div.className = 'icon-item';
      
      const canvas = document.createElement('canvas');
      canvas.width = size;
      canvas.height = size;
      drawIcon(canvas, size);
      
      const label = document.createElement('div');
      label.textContent = `${size}x${size}`;
      label.style.fontWeight = '500';
      label.style.marginBottom = '5px';
      
      const filenameLabel = document.createElement('div');
      filenameLabel.textContent = filename;
      filenameLabel.style.fontSize = '12px';
      filenameLabel.style.color = '#666';
      filenameLabel.style.marginBottom = '10px';
      
      const button = document.createElement('button');
      button.textContent = 'Download';
      button.onclick = () => {
        downloadCanvas(canvas, filename);
        button.textContent = '✓ Downloaded';
        button.style.background = '#059669';
        setTimeout(() => {
          button.textContent = 'Download';
          button.style.background = '#3B82F6';
        }, 2000);
      };
      
      div.appendChild(label);
      div.appendChild(filenameLabel);
      div.appendChild(canvas);
      div.appendChild(button);
      
      return div;
    }

    function generateAllIcons() {
      const iconsContainer = document.getElementById('icons');
      iconsContainer.innerHTML = '';
      
      const icons = [
        { size: 192, filename: 'icon-192.png' },
        { size: 512, filename: 'icon-512.png' },
        { size: 180, filename: 'apple-touch-icon.png' },
        { size: 32, filename: 'favicon-32.png' }
      ];
      
      icons.forEach(icon => {
        iconsContainer.appendChild(createIconElement(icon.size, icon.filename));
      });
      
      // Add download all button
      const downloadAllBtn = document.createElement('button');
      downloadAllBtn.textContent = 'Download All Icons';
      downloadAllBtn.style.fontSize = '16px';
      downloadAllBtn.style.padding = '12px 24px';
      downloadAllBtn.style.marginTop = '20px';
      downloadAllBtn.onclick = () => {
        icons.forEach((icon, index) => {
          setTimeout(() => {
            const canvas = iconsContainer.querySelectorAll('canvas')[index];
            downloadCanvas(canvas, icon.filename);
          }, index * 500);
        });
        downloadAllBtn.textContent = '✓ All Icons Downloaded';
        downloadAllBtn.style.background = '#059669';
      };
      
      iconsContainer.appendChild(downloadAllBtn);
    }

    // Auto-generate on load
    window.onload = () => {
      generateAllIcons();
    };
  </script>
</body>
</html>