fix: Fixed some unhandled exceptions.

src/ZonyLrcTools.Common/Lyrics/ILyricsItemCollectionFactory.cs

@@ -18,6 +18,6 @@ namespace ZonyLrcTools.Common.Lyrics
         /// <param name="sourceLyric">原始歌词数据。</param>
         /// <param name="translationLyric">翻译歌词数据。</param>
         /// <returns>构建完成的 <see cref="LyricsItemCollection"/> 对象。</returns>
-        LyricsItemCollection Build(string sourceLyric, string translationLyric);
+        LyricsItemCollection Build(string sourceLyric, string? translationLyric);
     }
 }

src/ZonyLrcTools.Common/Lyrics/LyricsItemCollectionFactory.cs

@@ -30,7 +30,7 @@ namespace ZonyLrcTools.Common.Lyrics
             return lyric;
         }
 
-        public LyricsItemCollection Build(string sourceLyric, string translationLyric)
+        public LyricsItemCollection Build(string sourceLyric, string? translationLyric)
         {
             var lyric = new LyricsItemCollection(_options.Provider.Lyric.Config);
             if (string.IsNullOrEmpty(sourceLyric))

src/ZonyLrcTools.Common/Lyrics/Providers/KuWo/JsonModel/GetLyricsResponse.cs

@@ -15,7 +15,7 @@ public class GetLyricsResponse
 
 public class GetLyricsResponseInnerData
 {
-    [JsonProperty("lrclist")] public ICollection<GetLyricsItem> Lyrics { get; set; }
+    [JsonProperty("lrclist")] public ICollection<GetLyricsItem>? Lyrics { get; set; }
 }
 
 public class GetLyricsItem

src/ZonyLrcTools.Common/Lyrics/Providers/KuWo/KuWoLyricsProvider.cs

@@ -60,6 +60,11 @@ public class KuWoLyricsProvider : LyricsProvider
         await ValueTask.CompletedTask;
 
         var lyricsResponse = (GetLyricsResponse)lyricsObject;
+        if (lyricsResponse.Data.Lyrics == null)
+        {
+            return new LyricsItemCollection(null);
+        }
+
         var items = lyricsResponse.Data.Lyrics.Select(l =>
         {
             var position = double.Parse(l.Position);

src/ZonyLrcTools.Common/Lyrics/Providers/NetEase/JsonModel/GetLyricResponse.cs

@@ -20,7 +20,7 @@ namespace ZonyLrcTools.Common.Lyrics.Providers.NetEase.JsonModel
         /// 如果存在翻译歌词，则本项内容为翻译歌词。
         /// </summary>
         [JsonProperty("tlyric")]
-        public InnerLyric TranslationLyric { get; set; }
+        public InnerLyric? TranslationLyric { get; set; }
 
         /// <summary>
         /// 如果存在罗马音歌词，则本项内容为罗马音歌词。

src/ZonyLrcTools.Common/Lyrics/Providers/NetEase/JsonModel/SongSearchResponse.cs

@@ -10,11 +10,6 @@ namespace ZonyLrcTools.Common.Lyrics.Providers.NetEase.JsonModel
 
         public int GetFirstMatchSongId(string songName, long? duration)
         {
-            if (Items == null || Items.SongItems == null)
-            {
-                Console.Write("xx");
-            }
-            
             var perfectMatch = Items.SongItems.FirstOrDefault(x => x.Name == songName);
             if (perfectMatch != null)
             {

src/ZonyLrcTools.Common/Lyrics/Providers/NetEase/NetEaseLyricsProvider.cs

@@ -76,7 +76,7 @@ namespace ZonyLrcTools.Common.Lyrics.Providers.NetEase
 
             return _lyricsItemCollectionFactory.Build(
                 json.OriginalLyric.Text,
-                json.TranslationLyric.Text);
+                json.TranslationLyric?.Text);
         }
 
         protected virtual void ValidateSongSearchResponse(SongSearchResponse response, LyricsProviderArgs args)

tests/ZonyLrcTools.Tests/Infrastructure/Lyrics/KuWoLyricsProviderTests.cs

@@ -25,4 +25,13 @@ public class KuWoLyricsProviderTests : TestBase
         lyric.ShouldNotBeNull();
         lyric.IsPruneMusic.ShouldBeFalse();
     }
+
+    [Fact]
+    public async Task DownloadAsync_Source_Null_Test()
+    {
+        var lyric = await _kuwoLyricsProvider.DownloadAsync("Concerto for Piano and Orchestra No. 12 in A major, K414 - 1. Allegro",
+            "Wolfgang Amadeus Mozart");
+
+        lyric.IsPruneMusic.ShouldBeTrue();
+    }
 }

tests/ZonyLrcTools.Tests/Infrastructure/Lyrics/NetEaseLyricsProviderTests.cs

@@ -120,5 +120,14 @@ namespace ZonyLrcTools.Tests.Infrastructure.Lyrics
             var result = await Should.ThrowAsync<ErrorCodeException>(_lyricsProvider.DownloadAsync("創世記", "りりィ").AsTask);
             result.ErrorCode.ShouldBe(ErrorCodes.NoMatchingSong);
         }
+
+        [Fact]
+        public async Task DownloadAsync_Source_Null_Test()
+        {
+            var lyric = await _lyricsProvider.DownloadAsync("Concerto for Piano and Orchestra No. 12 in A major, K414 - 1. Allegro",
+                "Wolfgang Amadeus Mozart");
+
+            lyric.IsPruneMusic.ShouldBeTrue();
+        }
     }
 }