feat: electron packaging, build scripts, gitignore and docs update

scripts/pack-html.cjs

@@ -0,0 +1,45 @@
+const { execSync } = require('child_process')
+const fs = require('fs')
+const path = require('path')
+
+const root = path.join(__dirname, '..')
+const dist = path.join(root, 'dist')
+const release = path.join(root, 'release')
+const jsonPath = path.join(root, 'public', 'scenes', 'demo.json')
+
+// 1. Verify JSON exists and is valid
+if (!fs.existsSync(jsonPath)) {
+  console.error('❌ public/scenes/demo.json not found')
+  process.exit(1)
+}
+
+try {
+  JSON.parse(fs.readFileSync(jsonPath, 'utf-8'))
+  console.log('✅ JSON valid')
+} catch (e) {
+  console.error('❌ JSON parse error:', e.message)
+  process.exit(1)
+}
+
+// 2. Build
+console.log('🔨 Building...')
+execSync('npx vite build', { cwd: root, stdio: 'inherit' })
+
+// 3. Copy public assets into dist
+console.log('📁 Copying assets...')
+;['videos', 'audio', 'images', 'scenes', 'subtitles'].forEach((dir) => {
+  const src = path.join(root, 'public', dir)
+  const dest = path.join(dist, dir)
+  if (fs.existsSync(src)) {
+    execSync(`cp -r "${src}" "${dest}"`)
+  }
+})
+
+// 4. Zip
+console.log('📦 Creating zip...')
+fs.rmSync(release, { recursive: true, force: true })
+fs.mkdirSync(release, { recursive: true })
+
+const outName = 'mygame'
+execSync(`cd "${dist}" && zip -r "${path.join(release, outName)}.zip" .`)
+console.log(`✅ Packaged: release/${outName}.zip`)