fix(media): recognize MP3 and M4A as voice-compatible audio (#15438)

* fix(media): recognize MP3 and M4A as voice-compatible audio

Telegram sendVoice supports OGG/Opus, MP3, and M4A, but
isVoiceCompatibleAudio only recognized OGG/Opus formats.

- Add MP3 and M4A extensions and MIME types
- Use explicit MIME set instead of substring matching
- Handle MIME parameters (e.g. 'audio/ogg; codecs=opus')
- Add test coverage for all supported and unsupported formats

* fix: narrow MIME allowlist per review feedback

Remove audio/mp4 and audio/aac from voice MIME types — too broad.
Keep only M4A-specific types (audio/x-m4a, audio/m4a).
Add audio/mp4 and audio/aac as negative test cases.

* fix: align voice compatibility and channel coverage (#15438) (thanks @azade-c)

---------

Co-authored-by: Peter Steinberger <steipete@gmail.com>

src/telegram/voice.test.ts

@@ -18,13 +18,13 @@ describe("resolveTelegramVoiceSend", () => {
     const logFallback = vi.fn();
     const result = resolveTelegramVoiceSend({
       wantsVoice: true,
-      contentType: "audio/mpeg",
-      fileName: "track.mp3",
+      contentType: "audio/wav",
+      fileName: "track.wav",
       logFallback,
     });
     expect(result.useVoice).toBe(false);
     expect(logFallback).toHaveBeenCalledWith(
-      "Telegram voice requested but media is audio/mpeg (track.mp3); sending as audio file instead.",
+      "Telegram voice requested but media is audio/wav (track.wav); sending as audio file instead.",
     );
   });
 
@@ -39,4 +39,19 @@ describe("resolveTelegramVoiceSend", () => {
     expect(result.useVoice).toBe(true);
     expect(logFallback).not.toHaveBeenCalled();
   });
+
+  it.each([
+    { contentType: "audio/mpeg", fileName: "track.mp3" },
+    { contentType: "audio/mp4", fileName: "track.m4a" },
+  ])("keeps voice for compatible MIME $contentType", ({ contentType, fileName }) => {
+    const logFallback = vi.fn();
+    const result = resolveTelegramVoiceSend({
+      wantsVoice: true,
+      contentType,
+      fileName,
+      logFallback,
+    });
+    expect(result.useVoice).toBe(true);
+    expect(logFallback).not.toHaveBeenCalled();
+  });
 });