fix(index): paste fills only project files, photo stays webcam-only

- pasted images/files always go to "Файлы проекта", never to the entry photo
- drop the photo paste hint and the capturedName plumbing: the entry photo is
  captured from the camera only (submit still requires it)
- keep paste naming ("Вставка <date>.<ext>") and server-mirrored limits

public/index.html

@@ -113,7 +113,6 @@ nav a:hover{color:var(--text)}
       <div class="photo-btns">
         <button type="button" class="cam" id="openCamBtn">Камера</button>
       </div>
-      <p class="paste-hint" id="photoPasteHint">Ctrl+V — вставить фото из буфера</p>
     </div>
     <div class="files-card">
       <div class="files-head">

public/js/index.js

@@ -13,9 +13,7 @@ const toast = document.getElementById('toast');
 const camVideo = document.getElementById('camVideo');
 const camCanvas = document.getElementById('camCanvas');
 const camModal = document.getElementById('camModal');
-const photoPasteHint = document.getElementById('photoPasteHint');
 let capturedBlob = null;
-let capturedName = 'photo.jpg';
 let stream = null;
 const descInput = document.getElementById('descInput');
 const filesInput = document.getElementById('filesInput');
@@ -124,7 +122,6 @@ const MAX_FILES = 10;
 const MAX_FILE_BYTES = 10 * 1024 * 1024;
 const MAX_TOTAL_BYTES = 30 * 1024 * 1024;
 const BLOCKED_FILE_EXT = /\.(?:html?|js|mjs|cjs|svg|xml|json|map|wasm|php\d?|phtml|asp|aspx|jsp|sh|bat|cmd|cgi|exe|dll|com|msi|scr|hta|vbs|py|r|rb|htaccess)$/i;
-const IMAGE_FILE_EXT = new Set(['.jpg', '.jpeg', '.png', '.gif', '.webp', '.bmp', '.avif', '.ico', '.heic', '.heif', '.jfif']);
 const MIME_EXT = {
   'image/png': '.png', 'image/jpeg': '.jpg', 'image/jpg': '.jpg', 'image/gif': '.gif', 'image/webp': '.webp',
   'image/bmp': '.bmp', 'image/avif': '.avif', 'image/heic': '.heic', 'image/heif': '.heif', 'image/svg+xml': '.svg',
@@ -208,31 +205,21 @@ document.addEventListener('paste', (e) => {
   if (!pasted.length && clip.files && clip.files.length) pasted.push(...Array.from(clip.files));
   if (!pasted.length) return;
   e.preventDefault();
-  let photoSet = false;
   let filesAdded = 0;
   const skipped = [];
   for (const raw of pasted) {
     const name = pasteFileName(raw);
     const file = raw.name === name ? raw : new File([raw], name, { type: raw.type || 'application/octet-stream', lastModified: raw.lastModified });
-    if (!capturedBlob && IMAGE_FILE_EXT.has(extFromFile(file))) {
-      capturedBlob = file;
-      capturedName = name;
-      showPreview(URL.createObjectURL(file));
-      photoSet = true;
-      continue;
-    }
     const res = addFiles([file]);
     filesAdded += res.added.length;
     skipped.push(...res.skipped);
   }
-  const parts = [];
+  if (!filesAdded) {
-  if (photoSet) parts.push('Фото вставлено из буфера');
-  if (filesAdded) parts.push(filesAdded === 1 ? 'Файл добавлен' : `Файлов добавлено: ${filesAdded}`);
-  if (!parts.length) {
     if (skipped.length) notify(skipped[0], true);
     return;
   }
-  notify(parts.join('. ') + (skipped.length ? '. ' + skipped[0] : ''), skipped.length > 0);
+  const summary = filesAdded === 1 ? 'Файл добавлен' : `Файлов добавлено: ${filesAdded}`;
+  notify(summary + (skipped.length ? '. ' + skipped[0] : ''), skipped.length > 0);
 });
 
 const params = new URLSearchParams(location.search);
@@ -339,16 +326,13 @@ function showPreview(src) {
   preview.src = src;
   preview.classList.add('has-photo');
   removePhotoBtn.classList.add('show');
-  photoPasteHint.style.display = 'none';
 }
 
 function removePhoto() {
   preview.src = placeholderSrc;
   preview.classList.remove('has-photo');
   removePhotoBtn.classList.remove('show');
-  photoPasteHint.style.display = '';
   capturedBlob = null;
-  capturedName = 'photo.jpg';
 }
 
 async function openCam() {
@@ -375,7 +359,6 @@ function capture() {
   ctx.drawImage(camVideo, 0, 0);
   camCanvas.toBlob(blob => {
     capturedBlob = blob;
-    capturedName = 'photo.jpg';
     showPreview(URL.createObjectURL(blob));
     closeCam();
   }, 'image/jpeg', captureQuality);
@@ -404,7 +387,7 @@ form.addEventListener('submit', async (e) => {
   btn.textContent = 'Отправка...';
 
   const fd = new FormData();
-  fd.append('photo', capturedBlob, capturedName);
+  fd.append('photo', capturedBlob, 'photo.jpg');
   selectedFiles.forEach(f => fd.append('files', f, f.name));
   fd.append('student_name', studentName || document.getElementById('nameInput').value);
   fd.append('group_id', groupInput.value);