feat: add email notification for new leave requests

- mailer.ts: nodemailer transport via local sendmail
- leave-notification.ts: HTML email matching PHP template
- Sends notification to LEAVE_NOTIFY_EMAIL on new leave request
- Non-blocking: errors logged but don't fail the request
- Added LEAVE_NOTIFY_EMAIL and APP_URL env vars

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/config/env.ts

@@ -37,8 +37,11 @@ export const config = {
     contactTo: process.env.CONTACT_EMAIL_TO || '',
     contactFrom: process.env.CONTACT_EMAIL_FROM || '',
     smtpFrom: process.env.SMTP_FROM || '',
+    leaveNotify: process.env.LEAVE_NOTIFY_EMAIL || '',
   },
 
+  appUrl: process.env.APP_URL || '',
+
   cors: {
     origins: (process.env.CORS_ORIGINS || '').split(',').filter(Boolean),
   },

src/routes/admin/leave-requests.ts

@@ -7,6 +7,7 @@ import { success, error, parseId } from '../../utils/response';
 import { parsePagination, buildPaginationMeta } from '../../utils/pagination';
 import { parseBody } from '../../schemas/common';
 import { CreateLeaveRequestSchema, ReviewLeaveRequestSchema } from '../../schemas/leave-requests.schema';
+import { notifyNewLeaveRequest } from '../../services/leave-notification';
 
 const VALID_LEAVE_TYPES = ['vacation', 'sick', 'unpaid'] as const;
 const VALID_REVIEW_STATUSES = ['approved', 'rejected'] as const;
@@ -85,6 +86,22 @@ export default async function leaveRequestsRoutes(fastify: FastifyInstance): Pro
     });
 
     await logAudit({ request, authData, action: 'create', entityType: 'leave_request', entityId: leaveRequest.id, description: `Vytvořena žádost o nepřítomnost` });
+
+    // Send email notification (non-blocking)
+    try {
+      const employeeName = `${authData.firstName} ${authData.lastName}`.trim() || authData.username;
+      notifyNewLeaveRequest({
+        leave_type: leaveType,
+        date_from: body.date_from,
+        date_to: body.date_to,
+        total_days: businessDays,
+        total_hours: businessDays * 8,
+        notes: body.notes,
+      }, employeeName).catch(err => request.log.error(err, 'Leave notification error'));
+    } catch (err) {
+      request.log.error(err, 'Leave notification error');
+    }
+
     return success(reply, { id: leaveRequest.id }, 201, 'Žádost byla odeslána ke schválení');
   });
 

src/services/leave-notification.ts

@@ -0,0 +1,96 @@
+import { sendMail } from './mailer';
+import { config } from '../config/env';
+
+const LEAVE_TYPE_LABELS: Record<string, string> = {
+  vacation: 'Dovolená',
+  sick: 'Nemocenská',
+  unpaid: 'Neplacené volno',
+};
+
+function formatDate(dateStr: string): string {
+  try {
+    const d = new Date(dateStr);
+    return `${String(d.getDate()).padStart(2, '0')}.${String(d.getMonth() + 1).padStart(2, '0')}.${d.getFullYear()}`;
+  } catch {
+    return dateStr;
+  }
+}
+
+function escapeHtml(str: string): string {
+  return str.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;');
+}
+
+interface LeaveRequestData {
+  leave_type: string;
+  date_from: string;
+  date_to: string;
+  total_days: number;
+  total_hours: number;
+  notes?: string | null;
+}
+
+export async function notifyNewLeaveRequest(request: LeaveRequestData, employeeName: string): Promise<void> {
+  const notifyEmail = config.email.leaveNotify;
+  if (!notifyEmail) return;
+
+  const leaveType = LEAVE_TYPE_LABELS[request.leave_type] || request.leave_type;
+  const dateFrom = formatDate(request.date_from);
+  const dateTo = formatDate(request.date_to);
+  const notes = request.notes || '';
+
+  const subject = `Nová žádost o nepřítomnost - ${employeeName} (${leaveType})`;
+
+  const appUrl = config.appUrl || '';
+  const approvalLink = appUrl
+    ? `<p style="margin-top: 20px;">
+        <a href="${escapeHtml(appUrl)}/leave-approval"
+           style="background: #de3a3a; color: #fff; padding: 10px 20px;
+                  text-decoration: none; border-radius: 5px;">
+            Přejít ke schvalování
+        </a>
+      </p>`
+    : '';
+
+  const now = new Date();
+  const timestamp = `${String(now.getDate()).padStart(2, '0')}.${String(now.getMonth() + 1).padStart(2, '0')}.${now.getFullYear()} ${String(now.getHours()).padStart(2, '0')}:${String(now.getMinutes()).padStart(2, '0')}:${String(now.getSeconds()).padStart(2, '0')}`;
+
+  const html = `
+    <html>
+    <body style="font-family: Arial, sans-serif; line-height: 1.6; color: #333;">
+        <h2 style="color: #de3a3a;">Nová žádost o nepřítomnost</h2>
+        <table style="width: 100%; border-collapse: collapse; margin: 20px 0;">
+            <tr>
+                <td style="padding: 10px; background: #f5f5f5; font-weight: bold; width: 180px;">Zaměstnanec:</td>
+                <td style="padding: 10px; border-bottom: 1px solid #ddd;">${escapeHtml(employeeName)}</td>
+            </tr>
+            <tr>
+                <td style="padding: 10px; background: #f5f5f5; font-weight: bold;">Typ:</td>
+                <td style="padding: 10px; border-bottom: 1px solid #ddd;">${escapeHtml(leaveType)}</td>
+            </tr>
+            <tr>
+                <td style="padding: 10px; background: #f5f5f5; font-weight: bold;">Období:</td>
+                <td style="padding: 10px; border-bottom: 1px solid #ddd;">${dateFrom} – ${dateTo}</td>
+            </tr>
+            <tr>
+                <td style="padding: 10px; background: #f5f5f5; font-weight: bold;">Pracovní dny:</td>
+                <td style="padding: 10px; border-bottom: 1px solid #ddd;">${request.total_days} dní (${request.total_hours} hodin)</td>
+            </tr>
+            ${notes ? `<tr>
+                <td style="padding: 10px; background: #f5f5f5; font-weight: bold;">Poznámka:</td>
+                <td style="padding: 10px; border-bottom: 1px solid #ddd;">${escapeHtml(notes)}</td>
+            </tr>` : ''}
+        </table>
+        ${approvalLink}
+        <hr style="margin: 30px 0; border: none; border-top: 1px solid #ddd;">
+        <p style="font-size: 12px; color: #999;">
+            Tato zpráva byla automaticky vygenerována systémem.<br>
+            Datum: ${timestamp}
+        </p>
+    </body>
+    </html>`;
+
+  const sent = await sendMail(notifyEmail, subject, html);
+  if (!sent) {
+    console.error(`LeaveNotification: Failed to send notification to ${notifyEmail}`);
+  }
+}

src/services/mailer.ts

@@ -0,0 +1,25 @@
+import nodemailer from 'nodemailer';
+import { config } from '../config/env';
+
+const transporter = nodemailer.createTransport({
+  sendmail: true,
+  newline: 'unix',
+  path: '/usr/sbin/sendmail',
+});
+
+export async function sendMail(to: string, subject: string, html: string): Promise<boolean> {
+  const from = config.email.smtpFrom || config.email.contactFrom || 'web@boha-automation.cz';
+
+  try {
+    await transporter.sendMail({
+      from: `System <${from}>`,
+      to,
+      subject,
+      html,
+    });
+    return true;
+  } catch (err) {
+    console.error(`Mailer error: failed to send to ${to}:`, err);
+    return false;
+  }
+}