fix: add .caf to AUDIO_FILE_EXTENSIONS (#10982)

* fix: add .caf to AUDIO_FILE_EXTENSIONS for iMessage voice messages

* fix: add caf audio extension regression coverage (#10982) (thanks @succ985)

---------

Co-authored-by: succ985 <succ985@users.noreply.github.com>
Co-authored-by: Gustavo Madeira Santana <gumadeiras@gmail.com>

src/media/mime.test.ts

@@ -1,6 +1,6 @@
 import JSZip from "jszip";
 import { describe, expect, it } from "vitest";
-import { detectMime, extensionForMime, imageMimeFromFormat } from "./mime.js";
+import { detectMime, extensionForMime, imageMimeFromFormat, isAudioFileName } from "./mime.js";
 
 async function makeOoxmlZip(opts: { mainMime: string; partPath: string }): Promise<Buffer> {
   const zip = new JSZip();
@@ -96,3 +96,17 @@ describe("extensionForMime", () => {
     expect(extensionForMime(undefined)).toBeUndefined();
   });
 });
+
+describe("isAudioFileName", () => {
+  it("matches known audio extensions", () => {
+    const cases = [
+      { fileName: "voice.mp3", expected: true },
+      { fileName: "voice.caf", expected: true },
+      { fileName: "voice.bin", expected: false },
+    ] as const;
+
+    for (const testCase of cases) {
+      expect(isAudioFileName(testCase.fileName)).toBe(testCase.expected);
+    }
+  });
+});

src/media/mime.ts

@@ -42,6 +42,7 @@ const MIME_BY_EXT: Record<string, string> = {
 
 const AUDIO_FILE_EXTENSIONS = new Set([
   ".aac",
+  ".caf",
   ".flac",
   ".m4a",
   ".mp3",