chore: ruler files update

Signed-off-by: Dmytro Stanchiev <git@dmytros.dev>

.claude/skills/huashu-design/scripts/export_deck_pdf.mjs

@@ -0,0 +1,98 @@
+#!/usr/bin/env node
+/**
+ * export_deck_pdf.mjs — 把多文件 slide deck 导出为单个矢量 PDF
+ *
+ * 用法：
+ *   node export_deck_pdf.mjs --slides <dir> --out <file.pdf> [--width 1920] [--height 1080]
+ *
+ * 特点：
+ *   - 文字保留矢量（可复制、可搜索）
+ *   - 背景/图形 1:1 保真（Playwright 内嵌 Chromium 渲染）
+ *   - 不需要对 HTML 做任何改造
+ *   - 视觉损失 = 0（PDF 就是浏览器打印出来的）
+ *
+ * trade-off：
+ *   - PDF 不可再编辑文字（要改回到 HTML 改）
+ *
+ * 依赖：playwright pdf-lib
+ *   npm install playwright pdf-lib
+ *
+ * 会按文件名排序（01-xxx.html → 02-xxx.html → ...）
+ */
+
+import { chromium } from 'playwright';
+import { PDFDocument } from 'pdf-lib';
+import fs from 'fs/promises';
+import path from 'path';
+
+function parseArgs() {
+  const args = { width: 1920, height: 1080 };
+  const a = process.argv.slice(2);
+  for (let i = 0; i < a.length; i += 2) {
+    const k = a[i].replace(/^--/, '');
+    args[k] = a[i + 1];
+  }
+  if (!args.slides || !args.out) {
+    console.error('用法: node export_deck_pdf.mjs --slides <dir> --out <file.pdf> [--width 1920] [--height 1080]');
+    process.exit(1);
+  }
+  args.width = parseInt(args.width);
+  args.height = parseInt(args.height);
+  return args;
+}
+
+async function main() {
+  const { slides, out, width, height } = parseArgs();
+  const slidesDir = path.resolve(slides);
+  const outFile = path.resolve(out);
+
+  const files = (await fs.readdir(slidesDir))
+    .filter(f => f.endsWith('.html'))
+    .sort();
+  if (!files.length) {
+    console.error(`No .html files found in ${slidesDir}`);
+    process.exit(1);
+  }
+  console.log(`Found ${files.length} slides in ${slidesDir}`);
+
+  const browser = await chromium.launch();
+  const ctx = await browser.newContext({ viewport: { width, height } });
+
+  // 1) Render each HTML to its own PDF buffer
+  const pageBuffers = [];
+  for (const f of files) {
+    const page = await ctx.newPage();
+    const url = 'file://' + path.join(slidesDir, f);
+    await page.goto(url, { waitUntil: 'networkidle' }).catch(() => page.goto(url));
+    await page.waitForTimeout(1200);  // web-font paint
+    // emulate "screen" so CSS colors/backgrounds render the same as browser
+    await page.emulateMedia({ media: 'screen' });
+    const buf = await page.pdf({
+      width: `${width}px`,
+      height: `${height}px`,
+      printBackground: true,
+      margin: { top: 0, right: 0, bottom: 0, left: 0 },
+      preferCSSPageSize: false,
+    });
+    pageBuffers.push(buf);
+    await page.close();
+    console.log(`  [${pageBuffers.length}/${files.length}] ${f}`);
+  }
+
+  await browser.close();
+
+  // 2) Merge into a single PDF
+  const merged = await PDFDocument.create();
+  for (const buf of pageBuffers) {
+    const src = await PDFDocument.load(buf);
+    const copied = await merged.copyPages(src, src.getPageIndices());
+    copied.forEach(p => merged.addPage(p));
+  }
+  const bytes = await merged.save();
+  await fs.writeFile(outFile, bytes);
+
+  const kb = (bytes.byteLength / 1024).toFixed(0);
+  console.log(`\n✓ Wrote ${outFile}  (${kb} KB, ${files.length} pages, vector)`);
+}
+
+main().catch(e => { console.error(e); process.exit(1); });