add photo placeholder, mirrored camera capture, configurable footer, and student .url zip export

public/admin.js

@@ -93,6 +93,34 @@ function fallbackCopy(text, done) {
   document.body.removeChild(ta);
 }
 
+function studentUrlContent(name) {
+  const url = `${location.origin}/?nameInput=${encodeURIComponent(name)}`;
+  return `[InternetShortcut]\r\nURL=${url}\r\n`;
+}
+
+function safeWindowsName(name) {
+  return String(name).replace(/[\\/:*?"<>|]/g, '_').replace(/\s+/g, '_');
+}
+
+function downloadBlob(blob, filename) {
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement('a');
+  a.href = url;
+  a.download = filename;
+  a.click();
+  URL.revokeObjectURL(url);
+}
+
+async function exportStudentUrlZip(students, zipName) {
+  if (typeof JSZip === 'undefined') { alert('JSZip не загружен'); return; }
+  const zip = new JSZip();
+  students.forEach(s => {
+    zip.file(safeWindowsName(s.name) + '.url', studentUrlContent(s.name));
+  });
+  const blob = await zip.generateAsync({ type: 'blob' });
+  downloadBlob(blob, zipName);
+}
+
 function copyText(text) {
   const done = () => showToast('Скопировано: ' + text);
   if (navigator.clipboard && window.isSecureContext) {