fix(number-fields): избегаем потери точности длинных чисел

- number-поля теперь рендерятся как text + inputMode=numeric,
  чтобы браузер не округлял значения через input type=number
- пробелы при вставке в number-поля удаляются
- бэкенд нормализует значения number-полей в строку перед сохранением
- добавлен хелпер normalizeFieldValueForStorage

Closes: искажение расчётного счёта и других длинных числовых полей

server/documents/worker/server.ts

@@ -0,0 +1,167 @@
+import express from "express";
+import { chromium } from "playwright";
+import { execFile } from "child_process";
+import { promisify } from "util";
+import fs from "fs/promises";
+import path from "path";
+import os from "os";
+
+const execFileAsync = promisify(execFile);
+const app = express();
+app.use(express.json({ limit: "50mb" }));
+
+const PORT = process.env.PORT || 3000;
+
+// ─── Healthcheck ───────────────────────────────────────────────────────────
+
+app.get("/health", (_req, res) => {
+  res.json({ status: "ok", timestamp: new Date().toISOString() });
+});
+
+// ─── HTML → PDF ────────────────────────────────────────────────────────────
+
+app.post("/convert/pdf", async (req, res) => {
+  const { html, options = {} } = req.body;
+  if (!html) {
+    return res.status(400).json({ success: false, error: "HTML обязателен" });
+  }
+
+  try {
+    const pdfBuffer = await convertHtmlToPdf(html, options);
+    res.json({
+      success: true,
+      pdf: pdfBuffer.toString("base64"),
+    });
+  } catch (err: any) {
+    console.error("[worker] PDF conversion error:", err);
+    res.status(500).json({ success: false, error: err.message || "Ошибка конвертации PDF" });
+  }
+});
+
+async function convertHtmlToPdf(html: string, options: any): Promise<Buffer> {
+  const launchOptions: Record<string, unknown> = {
+    headless: true,
+    args: ["--no-sandbox", "--disable-setuid-sandbox", "--disable-dev-shm-usage"],
+  };
+
+  if (process.env.PLAYWRIGHT_CHROMIUM_PATH) {
+    launchOptions.executablePath = process.env.PLAYWRIGHT_CHROMIUM_PATH;
+  }
+
+  const browser = await chromium.launch(launchOptions);
+  try {
+    const page = await browser.newPage();
+    await page.setContent(html, { waitUntil: "networkidle" });
+    await page.waitForTimeout(300);
+
+    const pdf = await page.pdf({
+      format: options.format || "A4",
+      landscape: options.landscape || false,
+      printBackground: options.printBackground !== false,
+      margin: options.margin
+        ? {
+            top: `${options.margin.top / 1440}in`,
+            right: `${options.margin.right / 1440}in`,
+            bottom: `${options.margin.bottom / 1440}in`,
+            left: `${options.margin.left / 1440}in`,
+          }
+        : undefined,
+      displayHeaderFooter: !!(options.headerTemplate || options.footerTemplate),
+      headerTemplate: options.headerTemplate || "<div></div>",
+      footerTemplate: options.footerTemplate || "<div></div>",
+    });
+
+    await page.close();
+    return pdf;
+  } finally {
+    await browser.close();
+  }
+}
+
+// ─── DOCX → PDF ────────────────────────────────────────────────────────────
+
+app.post("/convert/docx-to-pdf", async (req, res) => {
+  const { docxBase64 } = req.body;
+  if (!docxBase64) {
+    return res.status(400).json({ success: false, error: "DOCX base64 обязателен" });
+  }
+
+  try {
+    const pdfBuffer = await convertDocxToPdf(Buffer.from(docxBase64, "base64"));
+    res.json({
+      success: true,
+      pdf: pdfBuffer.toString("base64"),
+    });
+  } catch (err: any) {
+    console.error("[worker] DOCX→PDF conversion error:", err);
+    res.status(500).json({ success: false, error: err.message || "Ошибка конвертации DOCX→PDF" });
+  }
+});
+
+async function convertDocxToPdf(docxBuffer: Buffer): Promise<Buffer> {
+  const tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), "docx-pdf-"));
+  const docxPath = path.join(tmpDir, "input.docx");
+  const pdfPath = path.join(tmpDir, "input.pdf");
+
+  try {
+    await fs.writeFile(docxPath, docxBuffer);
+    await execFileAsync("libreoffice", [
+      "--headless",
+      "--convert-to",
+      "pdf",
+      "--outdir",
+      tmpDir,
+      docxPath,
+    ]);
+    return await fs.readFile(pdfPath);
+  } finally {
+    await fs.rm(tmpDir, { recursive: true, force: true }).catch(() => {});
+  }
+}
+
+// ─── EMF → PNG ─────────────────────────────────────────────────────────────
+
+app.post("/convert/emf-to-png", async (req, res) => {
+  const { emfBase64 } = req.body;
+  if (!emfBase64) {
+    return res.status(400).json({ success: false, error: "EMF base64 обязателен" });
+  }
+
+  try {
+    const pngBuffer = await convertEmfToPng(Buffer.from(emfBase64, "base64"));
+    res.json({
+      success: true,
+      png: pngBuffer.toString("base64"),
+    });
+  } catch (err: any) {
+    console.error("[worker] EMF→PNG conversion error:", err);
+    res.status(500).json({ success: false, error: err.message || "Ошибка конвертации EMF→PNG" });
+  }
+});
+
+async function convertEmfToPng(emfBuffer: Buffer): Promise<Buffer> {
+  const tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), "emf-png-"));
+  const inputPath = path.join(tmpDir, "image.emf");
+  const outputPath = path.join(tmpDir, "image.png");
+
+  try {
+    await fs.writeFile(inputPath, emfBuffer);
+    await execFileAsync("libreoffice", [
+      "--headless",
+      "--convert-to",
+      "png",
+      "--outdir",
+      tmpDir,
+      inputPath,
+    ]);
+    return await fs.readFile(outputPath);
+  } finally {
+    await fs.rm(tmpDir, { recursive: true, force: true }).catch(() => {});
+  }
+}
+
+// ─── Start ─────────────────────────────────────────────────────────────────
+
+app.listen(PORT, () => {
+  console.log(`[document-worker] Running on port ${PORT}`);
+});