feat: add music source service — NetEase/QQ providers, unified interface, cookie auth

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/music/netease.test.ts

@@ -0,0 +1,31 @@
+import { describe, it, expect } from "vitest";
+import { parseLyrics } from "./netease.js";
+
+describe("NetEase adapter", () => {
+  it("parses LRC format lyrics", () => {
+    const lrc = `[00:00.00] 作词 : 周杰伦
+[00:01.00] 作曲 : 周杰伦
+[00:12.50]故事的小黄花
+[00:15.80]从出生那年就飘着`;
+
+    const lines = parseLyrics(lrc);
+    expect(lines).toHaveLength(2);
+    expect(lines[0].time).toBeCloseTo(12.5, 1);
+    expect(lines[0].text).toBe("故事的小黄花");
+    expect(lines[1].time).toBeCloseTo(15.8, 1);
+    expect(lines[1].text).toBe("从出生那年就飘着");
+  });
+
+  it("handles empty lyrics", () => {
+    const lines = parseLyrics("");
+    expect(lines).toHaveLength(0);
+  });
+
+  it("merges translation lyrics", () => {
+    const lrc = "[00:12.50]Hello world";
+    const tlyric = "[00:12.50]你好世界";
+    const lines = parseLyrics(lrc, tlyric);
+    expect(lines[0].text).toBe("Hello world");
+    expect(lines[0].translation).toBe("你好世界");
+  });
+});