feat: restructure repo for collaboration + add desktop app source

- Reorganize project: clean structure (portable/ u-claw-app/ usb-scripts/ website/)
- Move docs into website/, rename uclaw-scripts to usb-scripts
- Add u-claw-app/ Electron desktop source code
- Add portable/setup.sh: one-command dev environment setup
- Add portable/SkillHub.html: skill marketplace page
- Update README: dev guide, contribution workflow, project structure
- Update .gitignore: exclude runtime binaries and build artifacts
- Expand China install guide: npm mirrors, detailed onboard wizard

u-claw-app/scripts/generate-icons.js

@@ -0,0 +1,85 @@
+#!/usr/bin/env node
+// Generate PNG icon from SVG, then create ICNS and ICO
+const { execSync } = require('child_process');
+const path = require('path');
+const fs = require('fs');
+
+const assetsDir = path.join(__dirname, '..', 'assets');
+const svgPath = path.join(assetsDir, 'icon.svg');
+const pngPath = path.join(assetsDir, 'icon.png');
+
+// Check if sips is available (macOS)
+try {
+  // Use rsvg-convert or sips to create PNG from SVG
+  // First try rsvg-convert
+  try {
+    execSync(`rsvg-convert -w 1024 -h 1024 "${svgPath}" -o "${pngPath}"`, { stdio: 'inherit' });
+    console.log('Created icon.png via rsvg-convert');
+  } catch {
+    // Fallback: create a simple PNG placeholder using sips
+    // sips can't convert SVG directly, so we'll use a different approach
+    console.log('rsvg-convert not found, trying alternative...');
+
+    // Try using Python with cairosvg
+    try {
+      execSync(`python3 -c "
+import cairosvg
+cairosvg.svg2png(url='${svgPath}', write_to='${pngPath}', output_width=1024, output_height=1024)
+"`, { stdio: 'inherit' });
+      console.log('Created icon.png via cairosvg');
+    } catch {
+      console.log('cairosvg not available either.');
+      console.log('Please install: brew install librsvg  OR  pip3 install cairosvg');
+      console.log('Then run this script again.');
+      console.log('');
+      console.log('Or manually convert assets/icon.svg to assets/icon.png (1024x1024)');
+      process.exit(1);
+    }
+  }
+
+  // Create ICNS for macOS
+  const iconsetDir = path.join(assetsDir, 'icon.iconset');
+  fs.mkdirSync(iconsetDir, { recursive: true });
+
+  const sizes = [16, 32, 64, 128, 256, 512, 1024];
+  for (const size of sizes) {
+    const outFile = size === 1024
+      ? path.join(iconsetDir, 'icon_512x512@2x.png')
+      : path.join(iconsetDir, `icon_${size}x${size}.png`);
+    execSync(`sips -z ${size} ${size} "${pngPath}" --out "${outFile}"`, { stdio: 'pipe' });
+
+    // Also create @2x versions
+    if (size <= 512 && size > 16) {
+      const halfSize = size / 2;
+      const out2x = path.join(iconsetDir, `icon_${halfSize}x${halfSize}@2x.png`);
+      execSync(`sips -z ${size} ${size} "${pngPath}" --out "${out2x}"`, { stdio: 'pipe' });
+    }
+  }
+
+  execSync(`iconutil -c icns "${iconsetDir}" -o "${path.join(assetsDir, 'icon.icns')}"`, { stdio: 'inherit' });
+  console.log('Created icon.icns');
+
+  // Clean up iconset
+  fs.rmSync(iconsetDir, { recursive: true });
+
+  // Create ICO for Windows (use png2ico or ImageMagick)
+  try {
+    // Try with ImageMagick
+    execSync(`convert "${pngPath}" -define icon:auto-resize=256,128,64,48,32,16 "${path.join(assetsDir, 'icon.ico')}"`, { stdio: 'inherit' });
+    console.log('Created icon.ico via ImageMagick');
+  } catch {
+    try {
+      // Try with sips + manual
+      execSync(`sips -z 256 256 "${pngPath}" --out "${path.join(assetsDir, 'icon-256.png')}"`, { stdio: 'pipe' });
+      console.log('Created icon-256.png (manual ICO conversion needed)');
+      console.log('Install ImageMagick for ICO: brew install imagemagick');
+    } catch {
+      console.log('Could not create ICO. Install ImageMagick: brew install imagemagick');
+    }
+  }
+
+  console.log('Icon generation complete!');
+} catch (err) {
+  console.error('Error generating icons:', err.message);
+  process.exit(1);
+}