fix(web): escape Lucene quotes in searchReleaseGroup query

A `"` or `\` inside artist/album terminates the quoted Lucene phrase
and corrupts the MusicBrainz search query. Escape both terms before
interpolation.

web/src/lib/musicbrainz.test.ts

@@ -47,4 +47,13 @@ describe("musicbrainz module", () => {
     vi.stubGlobal("fetch", vi.fn(() => jsonResponse({ "release-groups": [] })));
     expect(await searchReleaseGroup("Nobody", "Nothing")).toBeNull();
   });
+
+  it("escapes quotes in the release-group query", async () => {
+    const fetchMock = vi.fn((_url: string, _init?: RequestInit) => jsonResponse({ "release-groups": [] }));
+    vi.stubGlobal("fetch", fetchMock);
+    await searchReleaseGroup("AC/DC", 'Back in "Black"');
+    const [url] = fetchMock.mock.calls[0];
+    // the decoded query must contain the escaped quote, not a bare one that closes the phrase
+    expect(decodeURIComponent(url)).toContain('Back in \\"Black\\"');
+  });
 });