feat(upload): enhance audio upload handling and user feedback

- Introduced a new warning for users uploading non-FLAC or WAV formats, indicating that these formats should only be used as a last resort.
- Added functionality to highlight files needing format attention in the upload queue.
- Updated the UI to provide clearer guidance on acceptable audio formats during uploads.
- Improved documentation to reflect changes in upload requirements and user interface updates.

apps/web/src/features/uploads/files.test.ts

@@ -0,0 +1,15 @@
+import { describe, expect, it } from 'vitest';
+
+import { needsFormatAttention } from './files';
+
+describe('needsFormatAttention', () => {
+  it('marks everything except flac and wav', () => {
+    expect(needsFormatAttention('flac', 'a.mp3')).toBe(false);
+    expect(needsFormatAttention('WAV', 'track.wav')).toBe(false);
+    expect(needsFormatAttention(null, 'Кино/01.wav')).toBe(false);
+    expect(needsFormatAttention('mp3', 'a.flac')).toBe(true);
+    expect(needsFormatAttention(null, 'folder/song.MP3')).toBe(true);
+    expect(needsFormatAttention(null, 'song.m4a')).toBe(true);
+    expect(needsFormatAttention(null, 'noext')).toBe(false);
+  });
+});

apps/web/src/features/uploads/files.ts

@@ -8,6 +8,22 @@ export interface PickedFile {
 /** Форматы, которые принимает очередь (сервер всё равно проверяет содержимое через ffprobe). */
 export const AUDIO_EXTENSIONS = ['flac', 'mp3', 'm4a', 'ogg', 'opus', 'wav', 'aiff', 'aif', 'wv'];
 
+/** То, что просим присылать. MP3 и прочие — крайний случай, их помечает очередь. */
+const PREFERRED_AUDIO = new Set(['flac', 'wav']);
+
+export function audioExt(name: string): string {
+  const base = name.split(/[/\\]/).pop() ?? name;
+  const dot = base.lastIndexOf('.');
+  if (dot < 0 || dot === base.length - 1) return '';
+  return base.slice(dot + 1).toLowerCase();
+}
+
+/** Не FLAC и не WAV: в очереди на добавление такой файл нужно выделить. */
+export function needsFormatAttention(format: string | null | undefined, name: string): boolean {
+  const ext = (format || audioExt(name)).toLowerCase();
+  return ext !== '' && !PREFERRED_AUDIO.has(ext);
+}
+
 export function isAudio(name: string): boolean {
   const ext = name.split('.').pop()?.toLowerCase() ?? '';
   return AUDIO_EXTENSIONS.includes(ext);