feat: 本地化框架

静态分析没有问题了。但是一尝试扫描文件夹就炸。怀疑是权限问题，但不确定。

AGENTS.md

@@ -1,5 +1,10 @@
 # AGENTS.md
 
+## AI 行为准则
+
+- **称呼规范**：始终称呼用户为「思谦」或「王思谦」。
+- **信息缺失处理**：遇到任何不确定、拿不准或信息缺失的情况，不要自行推测。先收集整理好问题，停下来向思谦确认后再继续。
+
 ## Build & Test
 
 ```bash
@@ -26,17 +31,12 @@ dotnet run --project src/GUI                            # Launch the Avalonia de
 
 ## Known Issues / Gotchas
 
+- **升级 Avalonia 版本时，必须同步更新所有次级包引用。** 仅修改主包 `Avalonia` 的 Version 不会自动更新 `Avalonia.Desktop`、`Avalonia.Themes.Fluent`、`Avalonia.Fonts.Inter` 等次级包。必须手动逐个修改，然后执行 `dotnet clean && dotnet restore`。否则运行时的原生库（如 `libAvaloniaNative.dylib`）会混用新旧版本，导致 macOS 上的 `StorageProvider` 文件/文件夹选择对话框在回调时 SIGSEGV 崩溃。
+  - 相关 Avalonia issues: [#21102](https://github.com/AvaloniaUI/Avalonia/issues/21102), [#21150](https://github.com/AvaloniaUI/Avalonia/issues/21150), [#21313](https://github.com/AvaloniaUI/Avalonia/issues/21313)，修复 PR: [#21104](https://github.com/AvaloniaUI/Avalonia/pull/21104)。
 - **Tests create temp files/directories** under `Path.GetTempPath()` and clean them up via `IDisposable`. Don't rely on a real audio directory for tests.
 - **`AudioMetadataReader` tests** use real WAV files from `data/source/` (not in git). When files are absent, tests silently return early (`if (wavFiles.Length == 0) return;`) — they pass without actually running assertions, not `Skip.If`. Running `dotnet test` will report 12 passes regardless of whether the fixture files exist.
 - **`.atl.txt` fixture files** are generated by `AtlFieldExtractor`. If the WAV files or the ATL library version change, re-run the extractor to regenerate them before running metadata tests.
-
-## Data / Test Fixtures
-
-- **`data/source/`** 包含有版权保护的 WAV 音频文件，**不会提交到 git**。按厂商分子目录：`Boom/`、`Wow Sound/`、`The Odessy/`、`Sound Idea/`。
-  - 每个 WAV 旁有对应的 `.atl.txt` 文件（由 `AtlFieldExtractor` 生成），记录了 ATL 库解析出的完整元数据，供测试断言参考。
-  - Boom 目录下的文件元数据最丰富（标准标签 + iXML 自定义字段 + BWF bext 字段 + 嵌入封面）；Sound Idea 目录下的文件元数据最少（仅基础技术参数，无任何附加字段）。
-- **`AudioMetadataReader` 测试**使用 `data/source/Boom/` 和 `Sound Idea/` 中的 WAV 文件。文件不在 git 仓库中，测试通过 `if (wavFiles.Length == 0) return;` 静默返回（测试仍然 pass，但未执行实际断言）。
-- **路径解析**：测试运行时从 `bin/Debug/net10.0/` 启动，需向上回溯 6 级到达仓库根目录，再拼接 `data/source/`。
+- 需要一个UI设计。现在的界面属实有点丑陋了。
 
 ## Conventions
 

README.md

@@ -17,14 +17,22 @@
 ### Windows 
 
 数据库： %APPDATA%\Local\OCES\Resonance\Databases
-偏好设置： %APPDATA%\Roaming\OCES\Resonance\
+偏好设置： %APPDATA%\Roaming\OCES\Resonance\preferences.json
 
 ### Linux
 
 数据库： XDG_DATA_HOME
-偏好设置： XDG_CONFIG_HOME
+偏好设置： XDG_CONFIG_HOME/preferences.json
 缓存数据： XDG_CACHE_HOME
 
+### TODO
+
+- [ ] 扫描时如果报错，报错信息可能会填满整个窗口，导致Overlay无法关闭。
+- [ ] 读取时如果报错，没有任何警告，会静默报错。需要有一个界面右下方的toast，或是发送系统通知告知用户遇到了错误。
+- [x] 指针化Artwork字段。如果artwork的md5
+- [x] 本地化框架
+- [ ] 偏好设置/控制面板
+
 ## 技术栈
 
 .NET + Avaloina + SQLite

src/AtlFieldExtractor/DumpCodingHistory.cs

@@ -41,10 +41,10 @@ class DumpCodingHistory
     {
         Console.WriteLine($"处理: {wavFilePath}");
 
-        var track = new Track(wavFilePath);
+        Track track = new(wavFilePath);
 
         if (track.AdditionalFields == null ||
-            !track.AdditionalFields.TryGetValue("bext.codingHistory", out var codingHistory))
+            !track.AdditionalFields.TryGetValue("bext.codingHistory", out string? codingHistory))
         {
             Console.WriteLine("  -> 无 bext.codingHistory 字段");
             return;
@@ -53,8 +53,8 @@ class DumpCodingHistory
         Console.WriteLine($"  -> 字符串长度: {codingHistory.Length}");
 
         // 用 Latin-1 编码转回字节（Latin-1 把 Unicode 0x00-0xFF 直接映射为 byte 0x00-0xFF）
-        var bytes = System.Text.Encoding.Latin1.GetBytes(codingHistory);
-        var outputPath = Path.Combine(
+        byte[] bytes = System.Text.Encoding.Latin1.GetBytes(codingHistory);
+        string outputPath = Path.Combine(
             Path.GetDirectoryName(wavFilePath)!,
             Path.GetFileNameWithoutExtension(wavFilePath) + ".codingHistory.bin"
         );
@@ -64,7 +64,7 @@ class DumpCodingHistory
         Console.WriteLine($"  -> 字节数: {bytes.Length}");
 
         // 打印前 64 个字节的 hex
-        var hexPreview = Math.Min(64, bytes.Length);
+        int hexPreview = Math.Min(64, bytes.Length);
         Console.Write("  -> Hex 前 64 字节: ");
         for (int i = 0; i < hexPreview; i++)
         {
@@ -77,7 +77,7 @@ class DumpCodingHistory
         Console.Write("  -> ASCII 前 64 字节: ");
         for (int i = 0; i < hexPreview; i++)
         {
-            var c = (char)bytes[i];
+            char c = (char)bytes[i];
             Console.Write(c >= 32 && c < 127 ? c : '.');
             if ((i + 1) % 16 == 0) Console.Write(" ");
         }

src/AtlFieldExtractor/Program.cs

@@ -20,11 +20,11 @@ class Program
         }
     
         // 查找所有 WAV 文件
-        var wavFiles = Directory.GetFiles(sourceDir, "*.wav", SearchOption.AllDirectories);
+        string[] wavFiles = Directory.GetFiles(sourceDir, "*.wav", SearchOption.AllDirectories);
     
         Console.WriteLine($"找到 {wavFiles.Length} 个 WAV 文件");
     
-        foreach (var wavFile in wavFiles)
+        foreach (string wavFile in wavFiles)
         {
             try
             {
@@ -44,10 +44,10 @@ class Program
     {
         Console.WriteLine($"处理: {wavFilePath}");
 
-        var track = new Track(wavFilePath);
-        var outputPath = Path.ChangeExtension(wavFilePath, ".atl.txt");
+        Track track = new(wavFilePath);
+        string outputPath = Path.ChangeExtension(wavFilePath, ".atl.txt");
 
-        using var writer = new StreamWriter(outputPath);
+        using StreamWriter writer = new(outputPath);
         writer.WriteLine("=== ATL Track 基础属性 ===");
         writer.WriteLine();
 
@@ -91,7 +91,7 @@ class Program
         // 打印所有附加字段
         if (track.AdditionalFields != null && track.AdditionalFields.Count > 0)
         {
-            foreach (var field in track.AdditionalFields.OrderBy(f => f.Key))
+            foreach (KeyValuePair<string, string> field in track.AdditionalFields.OrderBy(f => f.Key))
             {
                 writer.WriteLine($"[{field.Key}] = {field.Value}");
             }
@@ -108,7 +108,7 @@ class Program
         // 打印图片信息
         if (track.EmbeddedPictures != null && track.EmbeddedPictures.Count > 0)
         {
-            foreach (var pic in track.EmbeddedPictures)
+            foreach (PictureInfo? pic in track.EmbeddedPictures)
             {
                 writer.WriteLine($"PictureType: {pic.PicType}");
                 writer.WriteLine($"Description: {pic.Description}");
@@ -129,7 +129,7 @@ class Program
         // 打印章节信息
         if (track.Chapters != null && track.Chapters.Count > 0)
         {
-            foreach (var chapter in track.Chapters)
+            foreach (ChapterInfo? chapter in track.Chapters)
             {
                 writer.WriteLine($"Title: {chapter.Title}");
                 writer.WriteLine($"StartTime: {chapter.StartTime}");

src/Core.Tests/Core.Tests.csproj

@@ -8,6 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Blake3" Version="2.2.1" />
     <PackageReference Include="coverlet.collector" Version="6.0.4" />
     <PackageReference Include="SQLitePCLRaw.bundle_e_sqlite3" Version="2.1.10" />
     <PackageReference Include="FluentAssertions" Version="8.9.0" />

src/Core.Tests/DatabaseTests.cs

@@ -40,6 +40,9 @@ public class DatabaseTests
             Assert.Contains("bpm", columns);
             Assert.Contains("description", columns);
 
+            Assert.Contains("artwork_fingerprint", columns);
+            Assert.DoesNotContain("artwork", columns); // 旧 BLOB 列不应存在
+
             // 3. 索引存在
             HashSet<string> indexes = conn.Query<string>(
                 "SELECT name FROM sqlite_master WHERE type='index' AND tbl_name='audio_files';")
@@ -49,6 +52,17 @@ public class DatabaseTests
             Assert.Contains("idx_path", indexes);
             Assert.Contains("idx_unique_id", indexes);
             Assert.Contains("idx_description", indexes);
+            Assert.Contains("idx_artwork_fingerprint", indexes);
+
+            // 4. artworks 表存在
+            int artworksTableCount = conn.ExecuteScalar<int>(
+                "SELECT COUNT(*) FROM sqlite_master WHERE type='table' AND name='artworks';");
+            Assert.Equal(1, artworksTableCount);
+
+            HashSet<string> artworksColumns = conn.Query<string>(
+                "SELECT name FROM pragma_table_info('artworks') ORDER BY cid;").ToHashSet();
+            Assert.Contains("fingerprint", artworksColumns);
+            Assert.Contains("data", artworksColumns);
         }
         finally
         {
@@ -110,7 +124,7 @@ public class DatabaseTests
             Description = "Test explosion sound",
             Category = "SFX",
             Keywords = "test,boom,explosion",
-            FxName = "Test Explosion Boom"
+            FxName = "Test Explosion Boom",
         };
     }
 
@@ -303,4 +317,107 @@ public class DatabaseTests
     }
 
     #endregion
+
+    #region Artwork 测试
+
+    [Fact]
+    public void AddEntry_WithArtwork_ShouldStoreFingerprintAndRetrieveData()
+    {
+        Database.InitializeDatabase();
+        AudioFileMeta meta = CreateSampleMeta();
+        byte[] artworkData = [0x89, 0x50, 0x4E, 0x47]; // PNG 幻数
+        meta.Artwork = artworkData;
+
+        Assert.True(Database.AddEntry(meta));
+
+        try
+        {
+            AudioFileMeta? retrieved = Database.GetEntryById(meta.Id);
+            Assert.NotNull(retrieved);
+            Assert.NotNull(retrieved!.ArtworkFingerprint);
+            Assert.Equal(64, retrieved.ArtworkFingerprint!.Length);
+
+            byte[]? actualData = Database.GetArtworkData(retrieved.ArtworkFingerprint);
+            Assert.NotNull(actualData);
+            Assert.Equal(artworkData, actualData);
+        }
+        finally
+        {
+            DeleteTestEntries(meta.UniqueId);
+            Database.DeleteOrphanedArtworks();
+        }
+    }
+
+    [Fact]
+    public void AddEntries_WithDuplicateArtwork_ShouldDeduplicate()
+    {
+        Database.InitializeDatabase();
+        byte[] artworkData = [0xFF, 0xD8, 0xFF, 0xE0]; // JPEG 幻数
+
+        AudioFileMeta meta1 = CreateSampleMeta();
+        meta1.Artwork = artworkData;
+        AudioFileMeta meta2 = CreateSampleMeta();
+        meta2.Artwork = artworkData;
+
+        Database.AddEntries([meta1, meta2]);
+
+        try
+        {
+            Assert.NotNull(meta1.ArtworkFingerprint);
+            Assert.Equal(meta1.ArtworkFingerprint, meta2.ArtworkFingerprint);
+
+            // artworks 表中只应有一条记录
+            using SQLiteConnection conn = new($"Data Source={GetDefaultDbPath()};Version=3;");
+            conn.Open();
+            int artworkCount = conn.ExecuteScalar<int>(
+                "SELECT COUNT(*) FROM artworks;");
+            Assert.Equal(1, artworkCount);
+        }
+        finally
+        {
+            DeleteTestEntries(meta1.UniqueId, meta2.UniqueId);
+            Database.DeleteOrphanedArtworks();
+        }
+    }
+
+    [Fact]
+    public void DeleteOrphanedArtworks_ShouldRemoveUnreferencedRecords()
+    {
+        Database.InitializeDatabase();
+        byte[] artworkData = [0x47, 0x49, 0x46, 0x38]; // GIF 幻数
+
+        AudioFileMeta meta = CreateSampleMeta();
+        meta.Artwork = artworkData;
+        Database.AddEntry(meta);
+
+        try
+        {
+            string fingerprint = meta.ArtworkFingerprint!;
+            Assert.NotNull(Database.GetArtworkData(fingerprint));
+
+            // 删除音频文件后，artwork 成为孤儿
+            DeleteTestEntries(meta.UniqueId);
+
+            int deleted = Database.DeleteOrphanedArtworks();
+            Assert.True(deleted >= 1); // 至少删除本次测试产生的孤儿
+
+            // 确认本次测试的 artwork 已被清理
+            Assert.Null(Database.GetArtworkData(fingerprint));
+        }
+        finally
+        {
+            DeleteTestEntries(meta.UniqueId);
+            Database.DeleteOrphanedArtworks();
+        }
+    }
+
+    [Fact]
+    public void GetArtworkData_NonExistent_ShouldReturnNull()
+    {
+        Database.InitializeDatabase();
+        byte[]? result = Database.GetArtworkData("nonexistentfingerprint000000000000000000000000000000000000000000000000");
+        Assert.Null(result);
+    }
+
+    #endregion
 }

src/Core.Tests/IntegratedTest.cs

@@ -69,7 +69,11 @@ public class IntegratedTest
                 Assert.Equal(meta.Type, retrieved.Type);
 
                 if (meta.Artwork != null)
-                    Assert.NotNull(retrieved.Artwork);
+                {
+                    Assert.NotNull(retrieved.ArtworkFingerprint);
+                    byte[]? artworkData = Database.GetArtworkData(retrieved.ArtworkFingerprint!);
+                    Assert.NotNull(artworkData);
+                }
             }
         }
         finally

src/Core/AudioFileMeta.cs

@@ -197,6 +197,10 @@ public class AudioFileMeta
     
     public string? MicPerspective { get; set; }
     
+    /// <summary>封面图片指纹（Blake3 十六进制），映射 artworks 表；实际图片数据通过 Database.GetArtworkData() 获取</summary>
+    public string? ArtworkFingerprint { get; set; }
+    
+    /// <summary>封面图片原始数据，仅用于导入管线暂存，不映射数据库列</summary>
     public byte[]? Artwork { get; set; }
     
     public byte[]? Waveform { get; set; }

src/Core/Core.csproj

@@ -7,6 +7,7 @@
     </PropertyGroup>
 
     <ItemGroup>
+      <PackageReference Include="Blake3" Version="2.2.1" />
       <PackageReference Include="Dapper" Version="2.1.72" />
       <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
       <PackageReference Include="System.Data.SQLite" Version="2.0.3" />

src/Core/Database.cs

@@ -1,5 +1,6 @@
 using System.Data;
 using System.Data.SQLite;
+using Blake3;
 using Dapper;
 
 namespace OCES.Resonance.Core;
@@ -107,7 +108,7 @@ public static class Database
                                bwf_umid BLOB,
                                disk_number INTEGER,
                                 track_number INTEGER,
-                               artwork BLOB,
+                                artwork_fingerprint TEXT,
                                 waveform BLOB
                             );
 
@@ -116,6 +117,12 @@ public static class Database
                             CREATE INDEX if not exists idx_path on audio_files(path);
                             CREATE INDEX if not exists idx_unique_id on audio_files(unique_id);
                             CREATE INDEX if not exists idx_description on audio_files(description);
+                            CREATE INDEX if not exists idx_artwork_fingerprint on audio_files(artwork_fingerprint);
+
+                            CREATE TABLE IF NOT EXISTS artworks (
+                                fingerprint TEXT PRIMARY KEY,
+                                data BLOB NOT NULL
+                            );
                                    
                            """;
         
@@ -147,7 +154,7 @@ public static class Database
                     release_date, track_year, is_edited, is_split, location, [group],
                     markers, comments, notes, copyright, coding_history, microphone,
                     mic_perspective,
-                    fx_name, channel_layout, bwf_umid, disk_number, track_number, artwork, waveform,
+                    fx_name, channel_layout, bwf_umid, disk_number, track_number, artwork_fingerprint, waveform,
                     user1, user2, user3, user4, user5, user6, user7, user8
                 ) VALUES (
                     @UniqueId, @ShortId, @Md5, @Path, @Filename, @Folder, @Directory,
@@ -161,11 +168,17 @@ public static class Database
                     @ReleaseDate, @TrackYear, @IsEdited, @IsSplit, @Location, @Group,
                     @Markers, @Comments, @Notes, @Copyright, @BwfCodingHistory, @Microphone,
                     @MicPerspective,
-                    @FxName, @ChannelLayout, @BwfUmid, @DiskNumber, @TrackNumber, @Artwork, @Waveform,
+                    @FxName, @ChannelLayout, @BwfUmid, @DiskNumber, @TrackNumber, @ArtworkFingerprint, @Waveform,
                     @User1, @User2, @User3, @User4, @User5, @User6, @User7, @User8
                 );
             ";
             
+            if (meta.Artwork is { Length: > 0 })
+            {
+                meta.ArtworkFingerprint = ComputeArtworkFingerprint(meta.Artwork);
+                EnsureArtwork(connection, null, meta.ArtworkFingerprint, meta.Artwork);
+            }
+            
             int newId = connection.ExecuteScalar<int>(sql + "; SELECT last_insert_rowid();", meta);
             meta.Id = newId;
             return true;
@@ -203,7 +216,7 @@ public static class Database
                     release_date, track_year, is_edited, is_split, location, [group],
                     markers, comments, notes, copyright, coding_history, microphone,
                     mic_perspective,
-                    fx_name, channel_layout, bwf_umid, disk_number, track_number, artwork, waveform,
+                    fx_name, channel_layout, bwf_umid, disk_number, track_number, artwork_fingerprint, waveform,
                     user1, user2, user3, user4, user5, user6, user7, user8
                 ) VALUES (
                     @UniqueId, @ShortId, @Md5, @Path, @Filename, @Folder, @Directory,
@@ -217,13 +230,18 @@ public static class Database
                     @ReleaseDate, @TrackYear, @IsEdited, @IsSplit, @Location, @Group,
                     @Markers, @Comments, @Notes, @Copyright, @BwfCodingHistory, @Microphone,
                     @MicPerspective,
-                    @FxName, @ChannelLayout, @BwfUmid, @DiskNumber, @TrackNumber, @Artwork, @Waveform,
+                    @FxName, @ChannelLayout, @BwfUmid, @DiskNumber, @TrackNumber, @ArtworkFingerprint, @Waveform,
                     @User1, @User2, @User3, @User4, @User5, @User6, @User7, @User8
                 );
             ";
             
             foreach (AudioFileMeta entry in entries)
             {
+                if (entry.Artwork is { Length: > 0 })
+                {
+                    entry.ArtworkFingerprint = ComputeArtworkFingerprint(entry.Artwork);
+                    EnsureArtwork(connection, transaction, entry.ArtworkFingerprint, entry.Artwork);
+                }
                 connection.Execute(sql, entry, transaction);
                 count++;
             }
@@ -275,10 +293,10 @@ public static class Database
         markers, comments, notes, copyright, coding_history AS bwf_coding_history, microphone,
         mic_perspective,
         fx_name, channel_layout, disk_number, track_number,
-        artwork, waveform, bwf_umid,
+        artwork_fingerprint, waveform, bwf_umid,
         user1, user2, user3, user4, user5, user6, user7, user8";
 
-    // 列表查询公共列（排除 BLOB：artwork / waveform / bwf_umid），减少数据传输
+    // 列表查询公共列（排除 BLOB：waveform / bwf_umid），减少数据传输
     private const string ListSelectColumns = @"
         id, unique_id, short_id, md5, path, filename, folder, directory,
         duration, bit_depth, channels, sample_rate, type,
@@ -292,13 +310,14 @@ public static class Database
         markers, comments, notes, copyright, coding_history AS bwf_coding_history, microphone,
         mic_perspective,
         fx_name, channel_layout, disk_number, track_number,
+        artwork_fingerprint,
         user1, user2, user3, user4, user5, user6, user7, user8";
 
     // 排序白名单，防止 SQL 注入
     private static readonly HashSet<string> AllowedSortColumns = new(StringComparer.OrdinalIgnoreCase)
     {
         "filename", "duration", "sample_rate", "channels",
-        "date_added", "rating", "type", "category", "id"
+        "date_added", "rating", "type", "category", "id",
     };
 
     /// <summary>
@@ -464,5 +483,138 @@ public static class Database
         return connection.ExecuteScalar<int>(sql, parameters);
     }
 
+    /// <summary>
+    /// 获取所有唯一的分类值
+    /// </summary>
+    public static IEnumerable<string> GetAllCategories()
+    {
+        using IDbConnection connection = GetConnection();
+        connection.Open();
+        const string sql = "SELECT DISTINCT category FROM audio_files WHERE category IS NOT NULL AND category != '' ORDER BY category;";
+        return connection.Query<string>(sql);
+    }
+
+    /// <summary>
+    /// 解析 Keywords 字段，返回所有唯一的标签
+    /// </summary>
+    public static IEnumerable<string> GetAllKeywords()
+    {
+        using IDbConnection connection = GetConnection();
+        connection.Open();
+        const string sql = "SELECT keywords FROM audio_files WHERE keywords IS NOT NULL AND keywords != '';";
+        IEnumerable<string> rows = connection.Query<string>(sql);
+        HashSet<string> allKeywords = new(StringComparer.OrdinalIgnoreCase);
+        foreach (string row in rows)
+        {
+            if (string.IsNullOrWhiteSpace(row)) continue;
+            foreach (string part in row.Split(',', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries))
+            {
+                if (!string.IsNullOrWhiteSpace(part))
+                    allKeywords.Add(part);
+            }
+        }
+        return allKeywords.OrderBy(k => k, StringComparer.OrdinalIgnoreCase);
+    }
+
+    /// <summary>
+    /// 更新音频文件的可编辑字段
+    /// </summary>
+    public static bool UpdateEntry(AudioFileMeta meta)
+    {
+        try
+        {
+            using IDbConnection connection = GetConnection();
+            connection.Open();
+            const string sql = """
+                                  UPDATE audio_files SET
+                                      rating = @Rating,
+                                      notes = @Notes,
+                                      keywords = @Keywords,
+                                      category = @Category,
+                                      subcategory = @Subcategory,
+                                      description = @Description,
+                                      comments = @Comments,
+                                      fx_name = @FxName,
+                                      genre = @Genre,
+                                      style = @Style,
+                                      mood = @Mood,
+                                      library = @Library,
+                                      project_name = @ProjectName,
+                                      designer = @Designer,
+                                      recordist = @Recordist,
+                                      publisher = @Publisher,
+                                      manufacturer = @Manufacturer,
+                                      microphone = @Microphone,
+                                      location = @Location,
+                                      user1 = @User1,
+                                      user2 = @User2,
+                                      user3 = @User3,
+                                      user4 = @User4,
+                                      user5 = @User5,
+                                      user6 = @User6,
+                                      user7 = @User7,
+                                      user8 = @User8
+                                  WHERE id = @Id;
+                              """;
+            connection.Execute(sql, meta);
+            return true;
+        }
+        catch (Exception)
+        {
+            return false;
+        }
+    }
+
+    #endregion
+
+    #region Artwork
+    
+    /// <summary>
+    /// 计算 artwork 数据的 Blake3 指纹
+    /// </summary>
+    private static string ComputeArtworkFingerprint(byte[] data)
+    {
+        return Hasher.Hash(data).ToString().ToLowerInvariant();
+    }
+    
+    /// <summary>
+    /// 确保 artwork 数据已存入 artworks 表（指纹不存在时插入）
+    /// </summary>
+    private static void EnsureArtwork(IDbConnection connection, IDbTransaction? transaction, string fingerprint, byte[] data)
+    {
+        const string sql = "INSERT OR IGNORE INTO artworks (fingerprint, data) VALUES (@Fingerprint, @Data);";
+        connection.Execute(sql, new { Fingerprint = fingerprint, Data = data }, transaction);
+    }
+    
+    /// <summary>
+    /// 根据指纹获取 artwork 原始数据
+    /// </summary>
+    public static byte[]? GetArtworkData(string fingerprint)
+    {
+        using IDbConnection connection = GetConnection();
+        connection.Open();
+        const string sql = "SELECT data FROM artworks WHERE fingerprint = @Fingerprint;";
+        return connection.ExecuteScalar<byte[]>(sql, new { Fingerprint = fingerprint });
+    }
+    
+    /// <summary>
+    /// 清理 artworks 表中无 audio_files 引用的孤儿记录
+    /// </summary>
+    /// <returns>删除的记录数</returns>
+    public static int DeleteOrphanedArtworks()
+    {
+        using IDbConnection connection = GetConnection();
+        connection.Open();
+        const string sql = """
+                               DELETE FROM artworks
+                               WHERE fingerprint NOT IN (
+                                   SELECT DISTINCT artwork_fingerprint
+                                   FROM audio_files
+                                   WHERE artwork_fingerprint IS NOT NULL
+                               );
+                           """;
+        return connection.Execute(sql);
+    }
+    
     #endregion
 }

src/Core/PreferencesManager.cs

@@ -28,7 +28,7 @@ public static class PreferencesManager
         // 文件不存在或反序列化失败 → 创建默认实例
         CurrentPreferences = new Preferences
         {
-            DatabasePath = GetDefaultDatabasePath()
+            DatabasePath = GetDefaultDatabasePath(),
         };
 
         // 立即落盘，确保下次启动能直接读取

src/GUI/App.axaml

@@ -1,7 +1,9 @@
 <Application xmlns="https://github.com/avaloniaui"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              x:Class="GUI.App"
+             Name="Resonance"
              xmlns:local="using:GUI"
+             xmlns:l10n="using:GUI.Converters"
              RequestedThemeVariant="Default">
              <!-- "Default" ThemeVariant follows system theme variant. "Dark" or "Light" are other available options. -->
 
@@ -9,6 +11,13 @@
         <local:ViewLocator/>
     </Application.DataTemplates>
 
+    <NativeMenu.Menu>
+        <NativeMenu>
+            <NativeMenuItem Header="{l10n:Localize About}" />
+            <NativeMenuItem Header="{l10n:Localize Preferences}"/>
+        </NativeMenu>
+    </NativeMenu.Menu>
+  
     <Application.Styles>
         <FluentTheme />
     </Application.Styles>

src/GUI/App.axaml.cs

@@ -1,9 +1,7 @@
 using Avalonia;
 using Avalonia.Controls.ApplicationLifetimes;
-using Avalonia.Data.Core;
-using Avalonia.Data.Core.Plugins;
-using System.Linq;
 using Avalonia.Markup.Xaml;
+using GUI.Services;
 using GUI.ViewModels;
 using GUI.Views;
 

src/GUI/Assets/Locale.Designer.cs

@@ -1,48 +0,0 @@
-//------------------------------------------------------------------------------
-// <auto-generated>
-//     This code was generated by a tool.
-//
-//     Changes to this file may cause incorrect behavior and will be lost if
-//     the code is regenerated.
-// </auto-generated>
-//------------------------------------------------------------------------------
-
-namespace GUI {
-    using System;
-    
-    
-    [System.CodeDom.Compiler.GeneratedCodeAttribute("System.Resources.Tools.StronglyTypedResourceBuilder", "4.0.0.0")]
-    [System.Diagnostics.DebuggerNonUserCodeAttribute()]
-    [System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
-    internal class Locale {
-        
-        private static System.Resources.ResourceManager resourceMan;
-        
-        private static System.Globalization.CultureInfo resourceCulture;
-        
-        [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode")]
-        internal Locale() {
-        }
-        
-        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Advanced)]
-        internal static System.Resources.ResourceManager ResourceManager {
-            get {
-                if (object.Equals(null, resourceMan)) {
-                    System.Resources.ResourceManager temp = new System.Resources.ResourceManager("GUI.Locale", typeof(Locale).Assembly);
-                    resourceMan = temp;
-                }
-                return resourceMan;
-            }
-        }
-        
-        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Advanced)]
-        internal static System.Globalization.CultureInfo Culture {
-            get {
-                return resourceCulture;
-            }
-            set {
-                resourceCulture = value;
-            }
-        }
-    }
-}

src/GUI/Assets/Locale.resx

@@ -1,21 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-
-<root>
-    <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
-        <xsd:element name="root" msdata:IsDataSet="true">
-            
-        </xsd:element>
-    </xsd:schema>
-    <resheader name="resmimetype">
-        <value>text/microsoft-resx</value>
-    </resheader>
-    <resheader name="version">
-        <value>1.3</value>
-    </resheader>
-    <resheader name="reader">
-        <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
-    </resheader>
-    <resheader name="writer">
-        <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
-    </resheader>
-</root>

src/GUI/Converters/LocalizeExtension.cs

@@ -0,0 +1,25 @@
+using Avalonia.Data;
+using Avalonia.Markup.Xaml;
+using GUI.Services;
+
+namespace GUI.Converters;
+
+public class LocalizeExtension : MarkupExtension
+{
+    public string Key { get; set; }
+
+    public LocalizeExtension(string key)
+    {
+        Key = key;
+    }
+
+    public override object ProvideValue(IServiceProvider serviceProvider)
+    {
+        return new Binding
+        {
+            Source = LocalizationService.Instance,
+            Path = $"[{Key}]",
+            Mode = BindingMode.OneWay,
+        };
+    }
+}

src/GUI/Converters/ValueConverters.cs

@@ -0,0 +1,152 @@
+using System.Globalization;
+using Avalonia.Data.Converters;
+using GUI.Services;
+
+namespace GUI.Converters;
+
+public class DurationFormatConverter : IValueConverter
+{
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is not double duration) return "--:--";
+        TimeSpan ts = TimeSpan.FromSeconds(duration);
+        if (ts.TotalHours >= 1)
+            return ts.ToString(@"h\:mm\:ss\.ff");
+        return ts.ToString(@"m\:ss\.ff");
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+        => throw new NotSupportedException();
+}
+
+public class SampleRateFormatConverter : IValueConverter
+{
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is not double rate) return "--";
+        return $"{rate / 1000.0:F1}k";
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+        => throw new NotSupportedException();
+}
+
+public class ChannelsFormatConverter : IValueConverter
+{
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        return value switch
+        {
+            int ch when ch == 1 => LocalizationService.Instance["ChannelsMono"],
+            int ch when ch == 2 => LocalizationService.Instance["ChannelsStereo"],
+            null => "--",
+            int ch => $"{ch}ch",
+            _ => "--",
+        };
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+        => throw new NotSupportedException();
+}
+
+public class RatingStarsConverter : IValueConverter
+{
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is not uint rating || rating == 0) return "☆☆☆☆☆";
+        return new string('★', (int)rating) + new string('☆', 5 - (int)rating);
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+        => throw new NotSupportedException();
+}
+
+public class DurationToSliderMaxConverter : IValueConverter
+{
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is not double duration) return 1.0;
+        return Math.Ceiling(duration);
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+        => throw new NotSupportedException();
+}
+
+public class PositionFormatConverter : IValueConverter
+{
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is not double pos) return "0:00";
+        TimeSpan ts = TimeSpan.FromSeconds(pos);
+        return ts.ToString(@"m\:ss");
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+        => throw new NotSupportedException();
+}
+
+public class InverseBoolConverter : IValueConverter
+{
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is bool b) return !b;
+        return true;
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is bool b) return !b;
+        return true;
+    }
+}
+
+public class HalfDoubleConverter : IValueConverter
+{
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is double d && !double.IsNaN(d) && !double.IsInfinity(d))
+            return d / 2.0;
+        return 400.0;
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+        => throw new NotSupportedException();
+}
+
+public class MiddleTruncateConverter : IValueConverter
+{
+    private const int KeepTail = 10;
+
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is not string text || string.IsNullOrEmpty(text)) return value;
+
+        int maxLength = 60;
+        if (parameter != null && int.TryParse(parameter.ToString(), NumberStyles.Integer, CultureInfo.InvariantCulture, out int parsed))
+            maxLength = parsed;
+
+        if (text.Length <= maxLength) return text;
+
+        int head = maxLength - KeepTail - 3;
+        if (head <= 0) return text[..maxLength];
+
+        return string.Concat(text.AsSpan(0, head), "...", text.AsSpan(text.Length - KeepTail, KeepTail));
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+        => throw new NotSupportedException();
+}
+
+public static class ValueConverters
+{
+    public static readonly IValueConverter DurationFormat = new DurationFormatConverter();
+    public static readonly IValueConverter SampleRateFormat = new SampleRateFormatConverter();
+    public static readonly IValueConverter ChannelsFormat = new ChannelsFormatConverter();
+    public static readonly IValueConverter RatingStars = new RatingStarsConverter();
+    public static readonly IValueConverter DurationToSliderMax = new DurationToSliderMaxConverter();
+    public static readonly IValueConverter PositionFormat = new PositionFormatConverter();
+    public static readonly IValueConverter InverseBool = new InverseBoolConverter();
+    public static readonly IValueConverter HalfDouble = new HalfDoubleConverter();
+    public static readonly IValueConverter MiddleTruncate = new MiddleTruncateConverter();
+}

src/GUI/GUI.csproj

@@ -3,26 +3,29 @@
         <OutputType>WinExe</OutputType>
         <TargetFramework>net10.0</TargetFramework>
         <Nullable>enable</Nullable>
+        <ImplicitUsings>enable</ImplicitUsings>
         <ApplicationManifest>app.manifest</ApplicationManifest>
         <AvaloniaUseCompiledBindingsByDefault>true</AvaloniaUseCompiledBindingsByDefault>
     </PropertyGroup>
 
     <ItemGroup>
         <Folder Include="Models\"/>
+        <Folder Include="Resources\"/>
         <AvaloniaResource Include="Assets\**"/>
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="Avalonia" Version="12.0.0"/>
-        <PackageReference Include="Avalonia.Desktop" Version="12.0.0"/>
-        <PackageReference Include="Avalonia.Themes.Fluent" Version="12.0.0"/>
-        <PackageReference Include="Avalonia.Fonts.Inter" Version="12.0.0"/>
+        <PackageReference Include="Avalonia" Version="12.0.3" />
+        <PackageReference Include="Avalonia.Desktop" Version="12.0.3"/>
+        <PackageReference Include="Avalonia.Themes.Fluent" Version="12.0.3"/>
+        <PackageReference Include="Avalonia.Fonts.Inter" Version="12.0.3"/>
         <PackageReference Include="AvaloniaUI.DiagnosticsSupport" Version="2.2.0">
             <IncludeAssets Condition="'$(Configuration)' != 'Debug'">None</IncludeAssets>
             <PrivateAssets Condition="'$(Configuration)' != 'Debug'">All</PrivateAssets>
         </PackageReference>
         <PackageReference Include="CommunityToolkit.Mvvm" Version="8.4.1"/>
         <PackageReference Include="Tmds.DBus.Protocol" Version="0.93.0" />
+        <PackageReference Include="SQLitePCLRaw.bundle_e_sqlite3" Version="2.1.10" />
     </ItemGroup>
 
     <ItemGroup>
@@ -30,17 +33,11 @@
     </ItemGroup>
 
     <ItemGroup>
-      <EmbeddedResource Update="Assets\Locale.resx">
-        <Generator>ResXFileCodeGenerator</Generator>
-        <LastGenOutput>Locale.Designer.cs</LastGenOutput>
+      <EmbeddedResource Include="Resources\LocaleZh.xml">
+        <LogicalName>GUI.LocaleZh.xml</LogicalName>
+      </EmbeddedResource>
+      <EmbeddedResource Include="Resources\LocaleEn.xml">
+        <LogicalName>GUI.LocaleEn.xml</LogicalName>
       </EmbeddedResource>
     </ItemGroup>
-
-    <ItemGroup>
-      <Compile Update="Assets\Locale.Designer.cs">
-        <DesignTime>True</DesignTime>
-        <AutoGen>True</AutoGen>
-        <DependentUpon>Locale.resx</DependentUpon>
-      </Compile>
-    </ItemGroup>
 </Project>

src/GUI/Resources/LocaleEn.xml

@@ -0,0 +1,157 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+    <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+        <xsd:element name="root" msdata:IsDataSet="true">
+        </xsd:element>
+    </xsd:schema>
+    <resheader name="resmimetype">
+        <value>text/microsoft-resx</value>
+    </resheader>
+    <resheader name="version">
+        <value>1.3</value>
+    </resheader>
+    <resheader name="reader">
+        <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    </resheader>
+    <resheader name="writer">
+        <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    </resheader>
+    <data name="About" xml:space="preserve">
+        <value>About…</value>
+    </data>
+    <data name="Preferences" xml:space="preserve">
+        <value>Preferences…</value>
+    </data>
+    <data name="Database" xml:space="preserve">
+        <value>Database</value>
+    </data>
+    <data name="MenuDeleteOrphanArtwork" xml:space="preserve">
+        <value>Delete Unused Artworks</value>
+    </data>
+    <data name="MenuOpenDatabaseFolder" xml:space="preserve">
+        <value>Open database file in Finder...</value>
+    </data>
+    <data name="ScanDirectory" xml:space="preserve">
+        <value>Scan Directory</value>
+    </data>
+    <data name="SelectAudioDirectory" xml:space="preserve">
+        <value>Select Audio Directory</value>
+    </data>
+    <data name="SearchFilesHint" xml:space="preserve">
+        <value>Search files...</value>
+    </data>
+    <data name="Refresh" xml:space="preserve">
+        <value>Refresh</value>
+    </data>
+    <data name="ResetFilters" xml:space="preserve">
+        <value>Reset Filters</value>
+    </data>
+    <data name="NoFilesHint" xml:space="preserve">
+        <value>No files yet. Scan a directory to add audio files.</value>
+    </data>
+    <data name="Metadata" xml:space="preserve">
+        <value>Metadata</value>
+    </data>
+    <data name="Save" xml:space="preserve">
+        <value>Save</value>
+    </data>
+    <data name="BasicInfo" xml:space="preserve">
+        <value>Basic Info</value>
+    </data>
+    <data name="Rating" xml:space="preserve">
+        <value>Rating</value>
+    </data>
+    <data name="TagsAndDescription" xml:space="preserve">
+        <value>Tags &amp; Description</value>
+    </data>
+    <data name="Category" xml:space="preserve">
+        <value>Category</value>
+    </data>
+    <data name="KeywordsCommaSeparated" xml:space="preserve">
+        <value>Keywords (comma-separated)</value>
+    </data>
+    <data name="Description" xml:space="preserve">
+        <value>Description</value>
+    </data>
+    <data name="Notes" xml:space="preserve">
+        <value>Notes</value>
+    </data>
+    <data name="DurationLabel" xml:space="preserve">
+        <value>Duration: </value>
+    </data>
+    <data name="SampleRateLabel" xml:space="preserve">
+        <value>Sample Rate: </value>
+    </data>
+    <data name="BitDepthLabel" xml:space="preserve">
+        <value>Bit Depth: </value>
+    </data>
+    <data name="ChannelsLabel" xml:space="preserve">
+        <value>Channels: </value>
+    </data>
+    <data name="TypeLabel" xml:space="preserve">
+        <value>Format: </value>
+    </data>
+    <data name="SelectFileToViewMetadata" xml:space="preserve">
+        <value>Select a file to view metadata</value>
+    </data>
+    <data name="CategoryPlaceholder" xml:space="preserve">
+        <value>Enter category...</value>
+    </data>
+    <data name="KeywordsPlaceholder" xml:space="preserve">
+        <value>Enter keywords...</value>
+    </data>
+    <data name="DescriptionPlaceholder" xml:space="preserve">
+        <value>Enter description...</value>
+    </data>
+    <data name="NotesPlaceholder" xml:space="preserve">
+        <value>Enter notes...</value>
+    </data>
+    <data name="Processed" xml:space="preserve">
+        <value>Processed: </value>
+    </data>
+    <data name="AddedFormat" xml:space="preserve">
+        <value>Added: {0}</value>
+    </data>
+    <data name="SkippedFormat" xml:space="preserve">
+        <value>Skipped: {0}</value>
+    </data>
+    <data name="Close" xml:space="preserve">
+        <value>Close</value>
+    </data>
+    <data name="Browse" xml:space="preserve">
+        <value>Browse</value>
+    </data>
+    <data name="AllFiles" xml:space="preserve">
+        <value>All Files</value>
+    </data>
+    <data name="Tags" xml:space="preserve">
+        <value>Tags</value>
+    </data>
+    <data name="ScanPreparing" xml:space="preserve">
+        <value>Preparing to scan...</value>
+    </data>
+    <data name="ScanDiscovering" xml:space="preserve">
+        <value>Discovering files...</value>
+    </data>
+    <data name="ScanParsing" xml:space="preserve">
+        <value>Found {0} files, parsing metadata...</value>
+    </data>
+    <data name="ScanComplete" xml:space="preserve">
+        <value>Scan complete: {0} added, {1} skipped</value>
+    </data>
+    <data name="ScanError" xml:space="preserve">
+        <value>Scan error: {0}</value>
+    </data>
+    <data name="NoFileSelected" xml:space="preserve">
+        <value>No file selected</value>
+    </data>
+    <data name="ChannelsMono" xml:space="preserve">
+        <value>Mono</value>
+    </data>
+    <data name="ChannelsStereo" xml:space="preserve">
+        <value>Stereo</value>
+    </data>
+    <data name="SortByField" xml:space="preserve">
+        <value>Sort by</value>
+    </data>
+</root>

src/GUI/Resources/LocaleZh.xml

@@ -0,0 +1,157 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+    <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+        <xsd:element name="root" msdata:IsDataSet="true">
+        </xsd:element>
+    </xsd:schema>
+    <resheader name="resmimetype">
+        <value>text/microsoft-resx</value>
+    </resheader>
+    <resheader name="version">
+        <value>1.3</value>
+    </resheader>
+    <resheader name="reader">
+        <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    </resheader>
+    <resheader name="writer">
+        <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+    </resheader>
+    <data name="About" xml:space="preserve">
+        <value>关于…</value>
+    </data>
+    <data name="Preferences" xml:space="preserve">
+        <value>偏好设置…</value>
+    </data>
+    <data name="Database" xml:space="preserve">
+        <value>数据库</value>
+    </data>
+    <data name="MenuDeleteOrphanArtwork" xml:space="preserve">
+        <value>删除没有使用的封面</value>
+    </data>
+    <data name="MenuOpenDatabaseFolder" xml:space="preserve">
+        <value>在访达中打开数据库文件…</value>
+    </data>
+    <data name="ScanDirectory" xml:space="preserve">
+        <value>扫描目录</value>
+    </data>
+    <data name="SelectAudioDirectory" xml:space="preserve">
+        <value>选择音频目录</value>
+    </data>
+    <data name="SearchFilesHint" xml:space="preserve">
+        <value>搜索文件...</value>
+    </data>
+    <data name="Refresh" xml:space="preserve">
+        <value>刷新</value>
+    </data>
+    <data name="ResetFilters" xml:space="preserve">
+        <value>重置筛选</value>
+    </data>
+    <data name="NoFilesHint" xml:space="preserve">
+        <value>暂无文件，请先扫描目录添加音频文件。</value>
+    </data>
+    <data name="Metadata" xml:space="preserve">
+        <value>元数据</value>
+    </data>
+    <data name="Save" xml:space="preserve">
+        <value>保存</value>
+    </data>
+    <data name="BasicInfo" xml:space="preserve">
+        <value>基础信息</value>
+    </data>
+    <data name="Rating" xml:space="preserve">
+        <value>评分</value>
+    </data>
+    <data name="TagsAndDescription" xml:space="preserve">
+        <value>标签与描述</value>
+    </data>
+    <data name="Category" xml:space="preserve">
+        <value>分类</value>
+    </data>
+    <data name="KeywordsCommaSeparated" xml:space="preserve">
+        <value>关键词（逗号分隔）</value>
+    </data>
+    <data name="Description" xml:space="preserve">
+        <value>描述</value>
+    </data>
+    <data name="Notes" xml:space="preserve">
+        <value>备注</value>
+    </data>
+    <data name="DurationLabel" xml:space="preserve">
+        <value>时长: </value>
+    </data>
+    <data name="SampleRateLabel" xml:space="preserve">
+        <value>采样率: </value>
+    </data>
+    <data name="BitDepthLabel" xml:space="preserve">
+        <value>位深: </value>
+    </data>
+    <data name="ChannelsLabel" xml:space="preserve">
+        <value>声道: </value>
+    </data>
+    <data name="TypeLabel" xml:space="preserve">
+        <value>格式: </value>
+    </data>
+    <data name="SelectFileToViewMetadata" xml:space="preserve">
+        <value>选择文件查看元数据</value>
+    </data>
+    <data name="CategoryPlaceholder" xml:space="preserve">
+        <value>输入分类...</value>
+    </data>
+    <data name="KeywordsPlaceholder" xml:space="preserve">
+        <value>输入关键词...</value>
+    </data>
+    <data name="DescriptionPlaceholder" xml:space="preserve">
+        <value>输入描述...</value>
+    </data>
+    <data name="NotesPlaceholder" xml:space="preserve">
+        <value>输入备注...</value>
+    </data>
+    <data name="Processed" xml:space="preserve">
+        <value>已处理: </value>
+    </data>
+    <data name="AddedFormat" xml:space="preserve">
+        <value>新增: {0}</value>
+    </data>
+    <data name="SkippedFormat" xml:space="preserve">
+        <value>跳过: {0}</value>
+    </data>
+    <data name="Close" xml:space="preserve">
+        <value>关闭</value>
+    </data>
+    <data name="Browse" xml:space="preserve">
+        <value>浏览</value>
+    </data>
+    <data name="AllFiles" xml:space="preserve">
+        <value>全部文件</value>
+    </data>
+    <data name="Tags" xml:space="preserve">
+        <value>标签</value>
+    </data>
+    <data name="ScanPreparing" xml:space="preserve">
+        <value>准备扫描...</value>
+    </data>
+    <data name="ScanDiscovering" xml:space="preserve">
+        <value>正在发现文件...</value>
+    </data>
+    <data name="ScanParsing" xml:space="preserve">
+        <value>发现 {0} 个文件，正在解析元数据...</value>
+    </data>
+    <data name="ScanComplete" xml:space="preserve">
+        <value>扫描完成：新增 {0}，跳过 {1}</value>
+    </data>
+    <data name="ScanError" xml:space="preserve">
+        <value>扫描出错：{0}</value>
+    </data>
+    <data name="NoFileSelected" xml:space="preserve">
+        <value>未选择文件</value>
+    </data>
+    <data name="ChannelsMono" xml:space="preserve">
+        <value>单声道</value>
+    </data>
+    <data name="ChannelsStereo" xml:space="preserve">
+        <value>立体声</value>
+    </data>
+    <data name="SortByField" xml:space="preserve">
+        <value>排序字段</value>
+    </data>
+</root>

src/GUI/Services/LocalizationService.cs

@@ -0,0 +1,168 @@
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Globalization;
+using System.Reflection;
+using System.Text.Json;
+using System.Xml;
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace GUI.Services;
+
+public sealed class LocalizationService : ObservableObject
+{
+    public static LocalizationService Instance { get; } = new();
+
+    private readonly Dictionary<string, Dictionary<string, string>> _strings = new();
+
+    private CultureInfo _currentCulture = CultureInfo.GetCultureInfo("zh-CN");
+    private string _currentCultureKey = "zh-CN";
+
+    public CultureInfo CurrentCulture
+    {
+        get => _currentCulture;
+        set
+        {
+            var key = value.Name;
+            if (key != "zh-CN" && key != "en-US")
+                key = "zh-CN";
+
+            if (!SetProperty(ref _currentCulture, CultureInfo.GetCultureInfo(key), nameof(CurrentCulture)))
+                return;
+
+            _currentCultureKey = key;
+            CultureInfo.CurrentCulture = _currentCulture;
+            CultureInfo.CurrentUICulture = _currentCulture;
+            OnPropertyChanged(new PropertyChangedEventArgs("Item[]"));
+        }
+    }
+
+    public IReadOnlyList<CultureInfo> SupportedCultures { get; }
+
+    private LocalizationService()
+    {
+        LoadResources("zh-CN", "GUI.LocaleZh.xml");
+        LoadResources("en-US", "GUI.LocaleEn.xml");
+
+        SupportedCultures = new ReadOnlyCollection<CultureInfo>(
+        [
+            CultureInfo.GetCultureInfo("zh-CN"),
+            CultureInfo.GetCultureInfo("en-US"),
+        ]);
+
+        LoadCulturePreference();
+    }
+
+    private void LoadResources(string cultureKey, string resourceName)
+    {
+        var dict = new Dictionary<string, string>();
+        var assembly = Assembly.GetExecutingAssembly();
+
+        using var stream = FindResource(assembly, resourceName);
+        if (stream == null) return;
+
+        using var reader = XmlReader.Create(stream);
+        while (reader.Read())
+        {
+            if (reader.NodeType != XmlNodeType.Element || reader.Name != "data") continue;
+            var name = reader.GetAttribute("name");
+            reader.ReadToDescendant("value");
+            var value = reader.ReadElementContentAsString();
+            if (name != null)
+                dict[name] = value;
+        }
+
+        _strings[cultureKey] = dict;
+    }
+
+    private static Stream? FindResource(Assembly assembly, string resourceName)
+    {
+        var stream = assembly.GetManifestResourceStream(resourceName);
+        if (stream != null) return stream;
+
+        foreach (var name in assembly.GetManifestResourceNames())
+        {
+            if (name.EndsWith(resourceName, StringComparison.OrdinalIgnoreCase))
+                return assembly.GetManifestResourceStream(name);
+        }
+
+        return null;
+    }
+
+    public string this[string key]
+    {
+        get
+        {
+            if (_strings.TryGetValue(_currentCultureKey, out var dict) && dict.TryGetValue(key, out var val))
+                return val;
+            if (_currentCultureKey != "zh-CN" && _strings.TryGetValue("zh-CN", out var fallback) && fallback.TryGetValue(key, out var fb))
+                return fb;
+            return $"<{key}>";
+        }
+    }
+
+    public string GetFormatted(string key, params object[] args)
+    {
+        try
+        {
+            return string.Format(_currentCulture, this[key], args);
+        }
+        catch
+        {
+            return this[key];
+        }
+    }
+
+    private void LoadCulturePreference()
+    {
+        var path = GetPreferencesPath();
+        if (!File.Exists(path)) return;
+
+        try
+        {
+            var json = File.ReadAllText(path);
+            using var doc = JsonDocument.Parse(json);
+            if (doc.RootElement.TryGetProperty("Language", out var lang))
+            {
+                var langStr = lang.GetString();
+                if (langStr is "zh-CN" or "en-US")
+                {
+                    CurrentCulture = CultureInfo.GetCultureInfo(langStr);
+                }
+            }
+        }
+        catch
+        {
+            // ignore malformed preference file
+        }
+    }
+
+    public void SaveCulturePreference()
+    {
+        var path = GetPreferencesPath();
+        var dir = Path.GetDirectoryName(path);
+        if (dir != null)
+            Directory.CreateDirectory(dir);
+
+        var opts = new JsonSerializerOptions { WriteIndented = true };
+        var json = JsonSerializer.Serialize(new Dictionary<string, string>
+        {
+            ["Language"] = _currentCultureKey,
+        }, opts);
+        File.WriteAllText(path, json);
+    }
+
+    private static string GetPreferencesPath()
+    {
+        if (OperatingSystem.IsMacOS())
+            return Path.Combine(
+                Environment.GetFolderPath(Environment.SpecialFolder.UserProfile),
+                "Library", "Preferences", "com.oces.Resonance.json");
+        if (OperatingSystem.IsWindows())
+            return Path.Combine(
+                Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
+                "OCES", "Resonance", "preferences.json");
+        return Path.Combine(
+            Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
+            "OCES", "Resonance", "preferences.json");
+    }
+}

src/GUI/Services/SyncChannel.cs

@@ -0,0 +1,26 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using OCES.Resonance.Core;
+
+namespace GUI.Services;
+
+public partial class SyncChannel : ObservableObject
+{
+    public string Id { get; }
+
+    [ObservableProperty]
+    private AudioFileMeta? _selectedFile;
+
+    [ObservableProperty]
+    private string? _filterCategory;
+
+    [ObservableProperty]
+    private string? _filterKeyword;
+
+    [ObservableProperty]
+    private string _searchText = string.Empty;
+
+    public SyncChannel(string id)
+    {
+        Id = id;
+    }
+}

src/GUI/Services/SyncChannelManager.cs

@@ -0,0 +1,18 @@
+namespace GUI.Services;
+
+public class SyncChannelManager
+{
+    private readonly Dictionary<string, SyncChannel> _channels = new();
+
+    public SyncChannel GetOrCreate(string id)
+    {
+        if (!_channels.TryGetValue(id, out SyncChannel? channel))
+        {
+            channel = new SyncChannel(id);
+            _channels[id] = channel;
+        }
+        return channel;
+    }
+
+    public SyncChannel Default => GetOrCreate("default");
+}

src/GUI/ViewLocator.cs

@@ -19,8 +19,8 @@ public class ViewLocator : IDataTemplate
         if (param is null)
             return null;
 
-        var name = param.GetType().FullName!.Replace("ViewModel", "View", StringComparison.Ordinal);
-        var type = Type.GetType(name);
+        string name = param.GetType().FullName!.Replace("ViewModel", "View", StringComparison.Ordinal);
+        Type? type = Type.GetType(name);
 
         if (type != null)
         {

src/GUI/ViewModels/FileListViewModel.cs

@@ -0,0 +1,118 @@
+using System.Collections.ObjectModel;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using GUI.Services;
+using OCES.Resonance.Core;
+
+namespace GUI.ViewModels;
+
+public partial class FileListViewModel : ViewModelBase
+{
+    private readonly SyncChannel _channel;
+
+    public ObservableCollection<AudioFileMeta> Files { get; } = new();
+
+    [ObservableProperty] private AudioFileMeta? _selectedFile;
+
+    [ObservableProperty] private string _searchText = string.Empty;
+
+    [ObservableProperty] private string? _selectedSortBy = "date_added";
+    [ObservableProperty] private bool _sortDescending = true;
+
+    [ObservableProperty] private double? _filterMinDuration;
+    [ObservableProperty] private double? _filterMaxDuration;
+    [ObservableProperty] private int? _filterSampleRate;
+    [ObservableProperty] private int? _filterChannels;
+
+    [ObservableProperty] private bool _isLoading;
+
+    public string[] SortOptions { get; } =
+    [
+        "date_added", "filename", "duration", "sample_rate", "channels", "rating", "type", "category",
+    ];
+
+    public FileListViewModel(SyncChannel channel)
+    {
+        _channel = channel;
+
+        _channel.PropertyChanged += (_, e) =>
+        {
+            if (e.PropertyName is nameof(SyncChannel.FilterCategory)
+                or nameof(SyncChannel.FilterKeyword)
+                or nameof(SyncChannel.SearchText))
+            {
+                SearchText = _channel.SearchText;
+                RefreshFiles();
+            }
+        };
+    }
+
+    partial void OnSelectedFileChanged(AudioFileMeta? value)
+    {
+        _channel.SelectedFile = value;
+    }
+
+    [RelayCommand]
+    private void RefreshFiles()
+    {
+        try
+        {
+            IsLoading = true;
+            Files.Clear();
+
+            IEnumerable<AudioFileMeta> entries = Database.QueryEntries(
+                searchText: string.IsNullOrWhiteSpace(_channel.SearchText) ? null : _channel.SearchText,
+                category: _channel.FilterCategory,
+                sortBy: SelectedSortBy,
+                sortDescending: SortDescending,
+                minDuration: FilterMinDuration,
+                maxDuration: FilterMaxDuration,
+                sampleRate: FilterSampleRate,
+                channels: FilterChannels,
+                limit: 500
+            );
+
+            // 如果有 FilterKeyword，在客户端过滤（Keywords 字段 LIKE 搜索）
+            foreach (AudioFileMeta entry in entries)
+            {
+                if (!string.IsNullOrWhiteSpace(_channel.FilterKeyword))
+                {
+                    if (entry.Keywords == null ||
+                        !entry.Keywords.Split(',', StringSplitOptions.TrimEntries)
+                            .Any(k => k.Equals(_channel.FilterKeyword, StringComparison.OrdinalIgnoreCase)))
+                        continue;
+                }
+                Files.Add(entry);
+            }
+
+            IsLoading = false;
+        }
+        catch (Exception)
+        {
+            IsLoading = false;
+        }
+    }
+
+    [RelayCommand]
+    private void ApplyFilters()
+    {
+        RefreshFiles();
+    }
+
+    [RelayCommand]
+    private void ResetFilters()
+    {
+        FilterMinDuration = null;
+        FilterMaxDuration = null;
+        FilterSampleRate = null;
+        FilterChannels = null;
+        _channel.SearchText = string.Empty;
+        SearchText = string.Empty;
+        RefreshFiles();
+    }
+
+    partial void OnSearchTextChanged(string value)
+    {
+        _channel.SearchText = value;
+    }
+}

src/GUI/ViewModels/MainWindowViewModel.cs

@@ -1,6 +1,71 @@
-namespace GUI.ViewModels;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using GUI.Services;
+
+namespace GUI.ViewModels;
 
 public partial class MainWindowViewModel : ViewModelBase
 {
-    public string Greeting { get; } = "Welcome to Avalonia!";
+    private readonly SyncChannelManager _channelManager;
+    private readonly SyncChannel _channel;
+
+    public TagTreeViewModel TagTreeVM { get; }
+    public FileListViewModel FileListVM { get; }
+    public MetadataPanelViewModel MetadataPanelVM { get; }
+    public PlayerBarViewModel PlayerBarVM { get; }
+    public ScanProgressViewModel ScanProgressVM { get; }
+
+    [ObservableProperty] private bool _isScanning;
+
+    public MainWindowViewModel()
+    {
+        _channelManager = new SyncChannelManager();
+        _channel = _channelManager.Default;
+
+        TagTreeVM = new TagTreeViewModel(_channel);
+        FileListVM = new FileListViewModel(_channel);
+        MetadataPanelVM = new MetadataPanelViewModel(_channel);
+        PlayerBarVM = new PlayerBarViewModel(_channel);
+        ScanProgressVM = new ScanProgressViewModel();
+
+        ScanProgressVM.ScanCompleted += OnScanCompleted;
+
+        // 启动时加载已有数据
+        LoadExistingData();
+    }
+
+    private void LoadExistingData()
+    {
+        try
+        {
+            OCES.Resonance.Core.Database.InitializeDatabase();
+            TagTreeVM.LoadDataCommand.Execute(null);
+            FileListVM.RefreshFilesCommand.Execute(null);
+        }
+        catch (Exception)
+        {
+            // 数据库尚未初始化或暂无数据，静默处理
+        }
+    }
+
+    private void OnScanCompleted()
+    {
+        IsScanning = false;
+        TagTreeVM.LoadDataCommand.Execute(null);
+        FileListVM.RefreshFilesCommand.Execute(null);
+    }
+
+    public void RequestScan(string directory)
+    {
+        if (string.IsNullOrWhiteSpace(directory)) return;
+        IsScanning = true;
+        ScanProgressVM.StartScanCommand.Execute(directory);
+    }
+
+    [RelayCommand]
+    private void CleanOrphanedArtwork()
+    {
+        int count = OCES.Resonance.Core.Database.DeleteOrphanedArtworks();
+        // TODO: 添加用户提示，例如对话框显示 "已清理 {count} 条未使用的资源"
+    }
 }

src/GUI/ViewModels/MetadataPanelViewModel.cs

@@ -0,0 +1,113 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using GUI.Services;
+using OCES.Resonance.Core;
+
+namespace GUI.ViewModels;
+
+public partial class MetadataPanelViewModel : ViewModelBase
+{
+    private readonly SyncChannel _channel;
+
+    [ObservableProperty] private AudioFileMeta? _currentFile;
+
+    [ObservableProperty] private bool _hasFile;
+
+    [ObservableProperty] private string _keywordsText = string.Empty;
+    [ObservableProperty] private string _notesText = string.Empty;
+    [ObservableProperty] private string _categoryText = string.Empty;
+    [ObservableProperty] private string _descriptionText = string.Empty;
+    [ObservableProperty] private uint _rating;
+    [ObservableProperty] private bool _isDirty;
+
+    public MetadataPanelViewModel(SyncChannel channel)
+    {
+        _channel = channel;
+
+        _channel.PropertyChanged += (_, e) =>
+        {
+            if (e.PropertyName == nameof(SyncChannel.SelectedFile))
+            {
+                LoadFile(_channel.SelectedFile);
+            }
+        };
+    }
+
+    private void LoadFile(AudioFileMeta? file)
+    {
+        CurrentFile = file;
+        if (file == null)
+        {
+            KeywordsText = string.Empty;
+            NotesText = string.Empty;
+            CategoryText = string.Empty;
+            DescriptionText = string.Empty;
+            Rating = 0;
+            IsDirty = false;
+            HasFile = false;
+            return;
+        }
+
+        KeywordsText = file.Keywords ?? string.Empty;
+        NotesText = file.Notes ?? string.Empty;
+        CategoryText = file.Category ?? string.Empty;
+        DescriptionText = file.Description ?? string.Empty;
+        Rating = file.Rating ?? 0;
+        IsDirty = false;
+        HasFile = true;
+    }
+
+    partial void OnKeywordsTextChanged(string value)
+    {
+        if (CurrentFile != null && value != (CurrentFile.Keywords ?? string.Empty))
+            IsDirty = true;
+    }
+
+    partial void OnNotesTextChanged(string value)
+    {
+        if (CurrentFile != null && value != (CurrentFile.Notes ?? string.Empty))
+            IsDirty = true;
+    }
+
+    partial void OnCategoryTextChanged(string value)
+    {
+        if (CurrentFile != null && value != (CurrentFile.Category ?? string.Empty))
+            IsDirty = true;
+    }
+
+    partial void OnDescriptionTextChanged(string value)
+    {
+        if (CurrentFile != null && value != (CurrentFile.Description ?? string.Empty))
+            IsDirty = true;
+    }
+
+    partial void OnRatingChanged(uint value)
+    {
+        if (CurrentFile != null && value != (CurrentFile.Rating ?? 0))
+            IsDirty = true;
+    }
+
+    [RelayCommand]
+    private void Save()
+    {
+        if (CurrentFile == null) return;
+
+        CurrentFile.Keywords = KeywordsText;
+        CurrentFile.Notes = NotesText;
+        CurrentFile.Category = CategoryText;
+        CurrentFile.Description = DescriptionText;
+        CurrentFile.Rating = Rating;
+
+        Database.UpdateEntry(CurrentFile);
+        IsDirty = false;
+
+        // 刷新 selected file 以反映变更
+        _channel.SelectedFile = CurrentFile;
+    }
+
+    [RelayCommand]
+    private void SetRating(uint rating)
+    {
+        Rating = rating;
+    }
+}

src/GUI/ViewModels/PlayerBarViewModel.cs

@@ -0,0 +1,74 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using GUI.Services;
+using OCES.Resonance.Core;
+
+namespace GUI.ViewModels;
+
+public partial class PlayerBarViewModel : ViewModelBase
+{
+    private readonly SyncChannel _channel;
+
+    [ObservableProperty] private AudioFileMeta? _currentFile;
+    [ObservableProperty] private bool _hasFile;
+    [ObservableProperty] private string _currentFileName = string.Empty;
+
+    [ObservableProperty] private bool _isPlaying;
+    [ObservableProperty] private double _currentPosition;
+    [ObservableProperty] private double _duration;
+    [ObservableProperty] private double _volume = 0.8;
+
+    public PlayerBarViewModel(SyncChannel channel)
+    {
+        _channel = channel;
+        CurrentFileName = Loc["NoFileSelected"];
+
+        _channel.PropertyChanged += (_, e) =>
+        {
+            if (e.PropertyName == nameof(SyncChannel.SelectedFile))
+            {
+                LoadFile(_channel.SelectedFile);
+            }
+        };
+    }
+
+    private void LoadFile(AudioFileMeta? file)
+    {
+        CurrentFile = file;
+        IsPlaying = false;
+        CurrentPosition = 0;
+
+        if (file == null)
+        {
+            CurrentFileName = Loc["NoFileSelected"];
+            Duration = 0;
+            HasFile = false;
+            return;
+        }
+
+        CurrentFileName = file.Filename;
+        Duration = file.Duration;
+        HasFile = true;
+    }
+
+    [RelayCommand]
+    private void PlayPause()
+    {
+        if (CurrentFile == null) return;
+        IsPlaying = !IsPlaying;
+        // TODO: 接入音频播放库后实现真正播放
+    }
+
+    [RelayCommand]
+    private void Stop()
+    {
+        IsPlaying = false;
+        CurrentPosition = 0;
+        // TODO: 接入音频播放库后实现真正停止
+    }
+
+    partial void OnCurrentPositionChanged(double value)
+    {
+        // TODO: 接入音频播放库后实现 seek
+    }
+}

src/GUI/ViewModels/ScanProgressViewModel.cs

@@ -0,0 +1,129 @@
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using OCES.Resonance.Core;
+
+namespace GUI.ViewModels;
+
+public partial class ScanProgressViewModel : ViewModelBase
+{
+    [ObservableProperty] private bool _isScanning;
+    [ObservableProperty] private string _statusText = "准备扫描...";
+    [ObservableProperty] private int _totalFiles;
+    [ObservableProperty] private int _processedFiles;
+    [ObservableProperty] private int _addedFiles;
+    [ObservableProperty] private int _skippedFiles;
+    [ObservableProperty] private double _progress;
+    [ObservableProperty] private string _currentFile = string.Empty;
+
+    public string AddedText => Loc.GetFormatted("AddedFormat", AddedFiles);
+    public string SkippedText => Loc.GetFormatted("SkippedFormat", SkippedFiles);
+
+    public event Action? ScanCompleted;
+
+    [RelayCommand]
+    private void StartScan(string directory)
+    {
+        if (string.IsNullOrWhiteSpace(directory)) return;
+
+        StatusText = Loc["ScanPreparing"];
+        Task.Run(() => ScanDirectoryInternal(directory));
+    }
+
+    [ObservableProperty] private bool _hasError;
+
+    [RelayCommand]
+    private void Dismiss()
+    {
+        IsScanning = false;
+        HasError = false;
+        StatusText = Loc["ScanPreparing"];
+    }
+
+    private void ScanDirectoryInternal(string directory)
+    {
+        try
+        {
+            HasError = false;
+            IsScanning = true;
+            StatusText = Loc["ScanDiscovering"];
+
+            Database.InitializeDatabase();
+
+            AudioFileScanner scanner = new();
+            AudioMetadataReader reader = new();
+            AudioFileMetaValidator validator = new();
+
+            List<string> files = scanner.ScanDirectory(directory, recursive: true).ToList();
+            TotalFiles = files.Count;
+            ProcessedFiles = 0;
+            AddedFiles = 0;
+            SkippedFiles = 0;
+            Progress = 0;
+
+            StatusText = Loc.GetFormatted("ScanParsing", TotalFiles);
+
+            foreach (string filePath in files)
+            {
+                CurrentFile = Path.GetFileName(filePath);
+                ProcessedFiles++;
+
+                try
+                {
+                    FileInfo fileInfo = new(filePath);
+                    AudioFileMeta? meta = reader.ReadMetadata(fileInfo);
+
+                    if (meta == null)
+                    {
+                        SkippedFiles++;
+                        UpdateProgress();
+                        continue;
+                    }
+
+                    if (!validator.Validate(meta, out _))
+                    {
+                        SkippedFiles++;
+                        UpdateProgress();
+                        continue;
+                    }
+
+                    if (Database.EntryExists(meta.Md5, meta.Path))
+                    {
+                        SkippedFiles++;
+                        UpdateProgress();
+                        continue;
+                    }
+
+                    Database.AddEntry(meta);
+                    AddedFiles++;
+                }
+                catch (Exception)
+                {
+                    SkippedFiles++;
+                }
+
+                UpdateProgress();
+            }
+
+            StatusText = Loc.GetFormatted("ScanComplete", AddedFiles, SkippedFiles);
+        }
+        catch (Exception ex)
+        {
+            HasError = true;
+            StatusText = Loc.GetFormatted("ScanError", ex.Message);
+        }
+        finally
+        {
+            if (!HasError)
+                IsScanning = false;
+            ScanCompleted?.Invoke();
+        }
+    }
+
+    private void UpdateProgress()
+    {
+        Progress = TotalFiles > 0 ? (double)ProcessedFiles / TotalFiles * 100 : 0;
+    }
+
+    partial void OnAddedFilesChanged(int value) => OnPropertyChanged(nameof(AddedText));
+    partial void OnSkippedFilesChanged(int value) => OnPropertyChanged(nameof(SkippedText));
+}

src/GUI/ViewModels/TagTreeViewModel.cs

@@ -0,0 +1,92 @@
+using System.Collections.ObjectModel;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using GUI.Services;
+using OCES.Resonance.Core;
+
+namespace GUI.ViewModels;
+
+public partial class TagTreeViewModel : ViewModelBase
+{
+    private readonly SyncChannel _channel;
+
+    public ObservableCollection<TagTreeNode> CategoryNodes { get; } = new();
+    public ObservableCollection<TagTreeNode> KeywordNodes { get; } = new();
+
+    [ObservableProperty] private TagTreeNode? _selectedNode;
+
+    public TagTreeViewModel(SyncChannel channel)
+    {
+        _channel = channel;
+    }
+
+    [RelayCommand]
+    private void LoadData()
+    {
+        try
+        {
+            CategoryNodes.Clear();
+            KeywordNodes.Clear();
+
+            IEnumerable<string> categories = Database.GetAllCategories();
+            foreach (string cat in categories)
+            {
+                CategoryNodes.Add(new TagTreeNode { Name = cat, Type = TagTreeNodeType.Category });
+            }
+
+            IEnumerable<string> keywords = Database.GetAllKeywords();
+            foreach (string kw in keywords)
+            {
+                KeywordNodes.Add(new TagTreeNode { Name = kw, Type = TagTreeNodeType.Keyword });
+            }
+        }
+        catch (Exception)
+        {
+            // 数据库尚未初始化或暂无数据
+        }
+    }
+
+    partial void OnSelectedNodeChanged(TagTreeNode? value)
+    {
+        if (value == null)
+        {
+            _channel.FilterCategory = null;
+            _channel.FilterKeyword = null;
+            return;
+        }
+
+        switch (value.Type)
+        {
+            case TagTreeNodeType.Category:
+                _channel.FilterCategory = value.Name;
+                _channel.FilterKeyword = null;
+                break;
+            case TagTreeNodeType.Keyword:
+                _channel.FilterCategory = null;
+                _channel.FilterKeyword = value.Name;
+                break;
+        }
+    }
+
+    [RelayCommand]
+    private void ClearFilter()
+    {
+        SelectedNode = null;
+        _channel.FilterCategory = null;
+        _channel.FilterKeyword = null;
+    }
+}
+
+public partial class TagTreeNode : ObservableObject
+{
+    public string Name { get; set; } = string.Empty;
+    public TagTreeNodeType Type { get; set; }
+
+    public override string ToString() => Name;
+}
+
+public enum TagTreeNodeType
+{
+    Category,
+    Keyword,
+}

src/GUI/ViewModels/ViewModelBase.cs

@@ -1,7 +1,9 @@
 using CommunityToolkit.Mvvm.ComponentModel;
+using GUI.Services;
 
 namespace GUI.ViewModels;
 
 public abstract class ViewModelBase : ObservableObject
 {
+    public LocalizationService Loc => LocalizationService.Instance;
 }

src/GUI/Views/FileListView.axaml

@@ -0,0 +1,94 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:GUI.ViewModels"
+             xmlns:core="using:OCES.Resonance.Core"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:converters="using:GUI.Converters"
+             xmlns:l10n="using:GUI.Converters"
+             mc:Ignorable="d"
+             x:Class="GUI.Views.FileListView"
+             x:DataType="vm:FileListViewModel">
+    <Design.DataContext>
+        <vm:FileListViewModel/>
+    </Design.DataContext>
+
+    <UserControl.Resources>
+        <converters:DurationFormatConverter x:Key="DurationFmt"/>
+        <converters:SampleRateFormatConverter x:Key="SampleRateFmt"/>
+        <converters:ChannelsFormatConverter x:Key="ChannelsFmt"/>
+        <converters:RatingStarsConverter x:Key="RatingStarsFmt"/>
+        <converters:InverseBoolConverter x:Key="InverseBool"/>
+    </UserControl.Resources>
+
+    <Grid RowDefinitions="Auto,*" Margin="4">
+        <Border Grid.Row="0" Padding="6" BorderBrush="{DynamicResource SystemBaseLowColorBrush}"
+                BorderThickness="0,0,0,1">
+            <StackPanel Spacing="6">
+                <Grid ColumnDefinitions="*,Auto" Margin="0,0,0,4">
+                    <TextBox Grid.Column="0" PlaceholderText="{l10n:Localize SearchFilesHint}" Text="{Binding SearchText}"/>
+                    <Button Grid.Column="1" Content="⟳" Command="{Binding RefreshFilesCommand}"
+                            Width="28" Height="28" ToolTip.Tip="{l10n:Localize Refresh}" Margin="4,0,0,0"/>
+                </Grid>
+
+                <StackPanel Orientation="Horizontal" Spacing="4">
+                    <ComboBox ItemsSource="{Binding SortOptions}" SelectedItem="{Binding SelectedSortBy}"
+                              Width="140" ToolTip.Tip="{l10n:Localize SortByField}"/>
+                    <Button Content="{l10n:Localize ResetFilters}" Command="{Binding ResetFiltersCommand}"
+                            Height="28" Margin="8,0,0,0"/>
+                </StackPanel>
+            </StackPanel>
+        </Border>
+
+        <Grid Grid.Row="1">
+            <TextBlock Text="{l10n:Localize NoFilesHint}"
+                       HorizontalAlignment="Center" VerticalAlignment="Center"
+                       Foreground="{DynamicResource SystemBaseMediumColorBrush}"
+                       FontSize="14"
+                       IsVisible="{Binding IsLoading, Converter={StaticResource InverseBool}}"/>
+
+            <ListBox ItemsSource="{Binding Files}"
+                     SelectedItem="{Binding SelectedFile}">
+                <ListBox.ItemTemplate>
+                    <DataTemplate x:DataType="core:AudioFileMeta">
+                        <Grid ColumnDefinitions="40,*,80,70,60,50,60,80,80" Margin="2">
+                            <TextBlock Grid.Column="0" Text="{Binding Id}" FontSize="11"
+                                       VerticalAlignment="Center" Margin="4,0"
+                                       Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+                            <StackPanel Grid.Column="1" VerticalAlignment="Center">
+                                <TextBlock Text="{Binding Filename}" FontWeight="SemiBold"
+                                           FontSize="12" TextTrimming="CharacterEllipsis" MaxWidth="250"/>
+                                <TextBlock Text="{Binding Path}" FontSize="10"
+                                           Foreground="{DynamicResource SystemBaseMediumColorBrush}"
+                                           TextTrimming="CharacterEllipsis" MaxWidth="250"/>
+                            </StackPanel>
+                            <TextBlock Grid.Column="2" Text="{Binding Duration, Converter={StaticResource DurationFmt}}"
+                                       VerticalAlignment="Center" FontSize="11"
+                                       Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+                            <TextBlock Grid.Column="3" Text="{Binding SampleRate, Converter={StaticResource SampleRateFmt}}"
+                                       VerticalAlignment="Center" FontSize="11"
+                                       Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+                            <TextBlock Grid.Column="4" Text="{Binding Channels, Converter={StaticResource ChannelsFmt}}"
+                                       VerticalAlignment="Center" FontSize="11"
+                                       Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+                            <TextBlock Grid.Column="5" Text="{Binding BitDepth, StringFormat='{}{0}bit'}"
+                                       VerticalAlignment="Center" FontSize="11"
+                                       Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+                            <TextBlock Grid.Column="6" Text="{Binding Type}"
+                                       VerticalAlignment="Center" FontSize="11"
+                                       Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+                            <TextBlock Grid.Column="7" Text="{Binding Category}"
+                                       VerticalAlignment="Center" FontSize="11" TextTrimming="CharacterEllipsis"/>
+                            <TextBlock Grid.Column="8" Text="{Binding Rating, Converter={StaticResource RatingStarsFmt}}"
+                                       VerticalAlignment="Center" FontSize="10"/>
+                        </Grid>
+                    </DataTemplate>
+                </ListBox.ItemTemplate>
+            </ListBox>
+
+            <ProgressBar IsVisible="{Binding IsLoading}"
+                         IsIndeterminate="{Binding IsLoading}"
+                         VerticalAlignment="Top"/>
+        </Grid>
+    </Grid>
+</UserControl>

src/GUI/Views/FileListView.axaml.cs

@@ -0,0 +1,11 @@
+using Avalonia.Controls;
+
+namespace GUI.Views;
+
+public partial class FileListView : UserControl
+{
+    public FileListView()
+    {
+        InitializeComponent();
+    }
+}

src/GUI/Views/MainWindow.axaml

@@ -1,20 +1,83 @@
 <Window xmlns="https://github.com/avaloniaui"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:vm="using:GUI.ViewModels"
+        xmlns:views="using:GUI.Views"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+        xmlns:l10n="using:GUI.Converters"
+        mc:Ignorable="d" d:DesignWidth="1200" d:DesignHeight="800"
         x:Class="GUI.Views.MainWindow"
         x:DataType="vm:MainWindowViewModel"
+        x:Name="Root"
         Icon="/Assets/avalonia-logo.ico"
-        Title="Resonance">
+        Title="Resonance"
+        Width="1200" Height="800"
+        MinWidth="900" MinHeight="600">
 
     <Design.DataContext>
-        <!-- This only sets the DataContext for the previewer in an IDE,
-             to set the actual DataContext for runtime, set the DataContext property in code (look at App.axaml.cs) -->
         <vm:MainWindowViewModel/>
     </Design.DataContext>
     
-    <TextBlock Text="{Binding Greeting}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
+    <NativeMenu.Menu>
+        <NativeMenu>
+            <NativeMenuItem Header="{l10n:Localize Database}" IsVisible="True">
+                <NativeMenu>
+                    <NativeMenuItem Header="{l10n:Localize MenuDeleteOrphanArtwork}" Command="{Binding CleanOrphanedArtworkCommand}"></NativeMenuItem>
+                    <NativeMenuItem Header="{l10n:Localize MenuOpenDatabaseFolder}"/>
+                </NativeMenu>
+            </NativeMenuItem>
+        </NativeMenu>
+    </NativeMenu.Menu>
     
+    <Grid RowDefinitions="Auto,*,Auto">
+
+        <!-- 工具栏 -->
+        <Border Grid.Row="0" Padding="6,4" BorderBrush="{DynamicResource SystemBaseLowColorBrush}"
+                BorderThickness="0,0,0,1" Background="{DynamicResource SystemAltMediumColorBrush}">
+            <StackPanel Orientation="Horizontal" Spacing="4">
+                <Button Content="{l10n:Localize ScanDirectory}" x:Name="ScanButton" Height="28" Padding="8,0"/>
+                <Button Content="{l10n:Localize Preferences}" Height="28" Padding="8,0" IsEnabled="False"/>
+            </StackPanel>
+        </Border>
+
+        <!-- 主内容区：三栏布局 -->
+        <Grid Grid.Row="1" ColumnDefinitions="220,4,*,4,300">
+
+            <!-- 左侧标签树 -->
+            <Border Grid.Column="0" BorderBrush="{DynamicResource SystemBaseLowColorBrush}"
+                    BorderThickness="0,0,1,0">
+                <views:TagTreeView DataContext="{Binding TagTreeVM}"/>
+            </Border>
+
+            <GridSplitter Grid.Column="1" Width="4" Background="Transparent"/>
+
+            <!-- 中间文件列表 -->
+            <Border Grid.Column="2">
+                <views:FileListView DataContext="{Binding FileListVM}"/>
+            </Border>
+
+            <GridSplitter Grid.Column="3" Width="4" Background="Transparent"/>
+
+            <!-- 右侧元数据面板 -->
+            <Border Grid.Column="4" BorderBrush="{DynamicResource SystemBaseLowColorBrush}"
+                    BorderThickness="1,0,0,0">
+                <views:MetadataPanelView DataContext="{Binding MetadataPanelVM}"/>
+            </Border>
+
+            <!-- 扫描进度遮罩 -->
+            <Border Grid.ColumnSpan="5"
+                    IsVisible="{Binding ScanProgressVM.IsScanning}"
+                    Background="#80000000">
+                <views:ScanProgressView DataContext="{Binding ScanProgressVM}"
+                                        HorizontalAlignment="Center"
+                                        VerticalAlignment="Center"/>
+            </Border>
+        </Grid>
+
+        <!-- 底部播放栏 -->
+        <Border Grid.Row="2">
+            <views:PlayerBarView DataContext="{Binding PlayerBarVM}"/>
+        </Border>
+
+    </Grid>
 </Window>

src/GUI/Views/MainWindow.axaml.cs

@@ -1,4 +1,8 @@
 using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.Platform.Storage;
+using GUI.Services;
+using GUI.ViewModels;
 
 namespace GUI.Views;
 
@@ -7,5 +11,23 @@ public partial class MainWindow : Window
     public MainWindow()
     {
         InitializeComponent();
+        this.ScanButton.Click += OnScanButtonClick;
+    }
+
+    private async void OnScanButtonClick(object? sender, RoutedEventArgs e)
+    {
+        if (DataContext is not MainWindowViewModel vm) return;
+
+        IReadOnlyList<IStorageFolder> folders = await StorageProvider.OpenFolderPickerAsync(new FolderPickerOpenOptions
+        {
+            Title = LocalizationService.Instance["SelectAudioDirectory"],
+            AllowMultiple = false,
+        });
+
+        if (folders.Count > 0)
+        {
+            string path = folders[0].Path.LocalPath;
+            vm.RequestScan(path);
+        }
     }
 }

src/GUI/Views/MetadataPanelView.axaml

@@ -0,0 +1,111 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:GUI.ViewModels"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:l10n="using:GUI.Converters"
+             mc:Ignorable="d"
+             x:Class="GUI.Views.MetadataPanelView"
+             x:DataType="vm:MetadataPanelViewModel">
+    <Design.DataContext>
+        <vm:MetadataPanelViewModel/>
+    </Design.DataContext>
+
+    <ScrollViewer>
+        <Grid RowDefinitions="Auto,*" Margin="8">
+            <StackPanel Grid.Row="0" Orientation="Horizontal" Spacing="4" Margin="0,0,0,8">
+                <TextBlock Text="{l10n:Localize Metadata}" FontWeight="Bold" FontSize="14" VerticalAlignment="Center"/>
+                <Button Content="{l10n:Localize Save}" Command="{Binding SaveCommand}"
+                        IsEnabled="{Binding IsDirty}"
+                        Height="28" Width="60" HorizontalAlignment="Right"/>
+            </StackPanel>
+
+            <StackPanel Grid.Row="1" Spacing="8"
+                        IsVisible="{Binding HasFile}">
+
+                <!-- 基础信息 -->
+                <Border Padding="6" BorderBrush="{DynamicResource SystemBaseLowColorBrush}" BorderThickness="1"
+                        CornerRadius="4">
+                    <StackPanel Spacing="4">
+                        <TextBlock Text="{l10n:Localize BasicInfo}" FontWeight="SemiBold" FontSize="12"
+                                   Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+                        <TextBlock Text="{Binding CurrentFile.Filename}" FontSize="13" FontWeight="Bold"/>
+                        <StackPanel Orientation="Horizontal" Spacing="2">
+                            <TextBlock Text="{l10n:Localize DurationLabel}"/>
+                            <TextBlock Text="{Binding CurrentFile.Duration, StringFormat='{}{0:F2}s'}"/>
+                        </StackPanel>
+                        <StackPanel Orientation="Horizontal" Spacing="2">
+                            <TextBlock Text="{l10n:Localize SampleRateLabel}"/>
+                            <TextBlock Text="{Binding CurrentFile.SampleRate, StringFormat='{}{0} Hz'}"/>
+                        </StackPanel>
+                        <StackPanel Orientation="Horizontal" Spacing="2">
+                            <TextBlock Text="{l10n:Localize BitDepthLabel}"/>
+                            <TextBlock Text="{Binding CurrentFile.BitDepth, StringFormat='{}{0} bit'}"/>
+                        </StackPanel>
+                        <StackPanel Orientation="Horizontal" Spacing="2">
+                            <TextBlock Text="{l10n:Localize ChannelsLabel}"/>
+                            <TextBlock Text="{Binding CurrentFile.Channels}"/>
+                        </StackPanel>
+                        <StackPanel Orientation="Horizontal" Spacing="2">
+                            <TextBlock Text="{l10n:Localize TypeLabel}"/>
+                            <TextBlock Text="{Binding CurrentFile.Type}"/>
+                        </StackPanel>
+                    </StackPanel>
+                </Border>
+
+                <!-- 评分 -->
+                <Border Padding="6" BorderBrush="{DynamicResource SystemBaseLowColorBrush}" BorderThickness="1"
+                        CornerRadius="4">
+                    <StackPanel Spacing="4">
+                        <TextBlock Text="{l10n:Localize Rating}" FontWeight="SemiBold" FontSize="12"
+                                   Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+                        <StackPanel Orientation="Horizontal" Spacing="2">
+                            <Button Content="☆" Command="{Binding SetRatingCommand}" CommandParameter="0"
+                                    Width="28" Height="28" FontSize="16"/>
+                            <Button Content="★" Command="{Binding SetRatingCommand}" CommandParameter="1"
+                                    Width="28" Height="28" FontSize="16"/>
+                            <Button Content="★" Command="{Binding SetRatingCommand}" CommandParameter="2"
+                                    Width="28" Height="28" FontSize="16"/>
+                            <Button Content="★" Command="{Binding SetRatingCommand}" CommandParameter="3"
+                                    Width="28" Height="28" FontSize="16"/>
+                            <Button Content="★" Command="{Binding SetRatingCommand}" CommandParameter="4"
+                                    Width="28" Height="28" FontSize="16"/>
+                            <Button Content="★" Command="{Binding SetRatingCommand}" CommandParameter="5"
+                                    Width="28" Height="28" FontSize="16"/>
+                        </StackPanel>
+                    </StackPanel>
+                </Border>
+
+                <!-- 编辑区 -->
+                <Border Padding="6" BorderBrush="{DynamicResource SystemBaseLowColorBrush}" BorderThickness="1"
+                        CornerRadius="4">
+                    <StackPanel Spacing="6">
+                        <TextBlock Text="{l10n:Localize TagsAndDescription}" FontWeight="SemiBold" FontSize="12"
+                                   Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+
+                        <TextBlock Text="{l10n:Localize Category}"/>
+                        <TextBox Text="{Binding CategoryText}" PlaceholderText="{l10n:Localize CategoryPlaceholder}"/>
+
+                        <TextBlock Text="{l10n:Localize KeywordsCommaSeparated}"/>
+                        <TextBox Text="{Binding KeywordsText}" PlaceholderText="{l10n:Localize KeywordsPlaceholder}" MinHeight="40"
+                                 AcceptsReturn="True"/>
+
+                        <TextBlock Text="{l10n:Localize Description}"/>
+                        <TextBox Text="{Binding DescriptionText}" PlaceholderText="{l10n:Localize DescriptionPlaceholder}" MinHeight="40"
+                                 AcceptsReturn="True"/>
+
+                        <TextBlock Text="{l10n:Localize Notes}"/>
+                        <TextBox Text="{Binding NotesText}" PlaceholderText="{l10n:Localize NotesPlaceholder}" MinHeight="40"
+                                 AcceptsReturn="True"/>
+                    </StackPanel>
+                </Border>
+            </StackPanel>
+
+            <!-- 未选择文件 -->
+            <TextBlock Grid.Row="1" Text="{l10n:Localize SelectFileToViewMetadata}"
+                       HorizontalAlignment="Center" VerticalAlignment="Center"
+                       Foreground="{DynamicResource SystemBaseMediumColorBrush}"
+                       IsVisible="{Binding !HasFile}"/>
+        </Grid>
+    </ScrollViewer>
+</UserControl>

src/GUI/Views/MetadataPanelView.axaml.cs

@@ -0,0 +1,11 @@
+using Avalonia.Controls;
+
+namespace GUI.Views;
+
+public partial class MetadataPanelView : UserControl
+{
+    public MetadataPanelView()
+    {
+        InitializeComponent();
+    }
+}

src/GUI/Views/PlayerBarView.axaml

@@ -0,0 +1,50 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:GUI.ViewModels"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:converters="using:GUI.Converters"
+             mc:Ignorable="d"
+             x:Class="GUI.Views.PlayerBarView"
+             x:DataType="vm:PlayerBarViewModel">
+    <Design.DataContext>
+        <vm:PlayerBarViewModel/>
+    </Design.DataContext>
+
+    <UserControl.Resources>
+        <converters:DurationToSliderMaxConverter x:Key="DurToSlider"/>
+        <converters:PositionFormatConverter x:Key="PosFmt"/>
+        <converters:DurationFormatConverter x:Key="DurFmt"/>
+    </UserControl.Resources>
+
+    <Border Padding="8,4" BorderBrush="{DynamicResource SystemBaseLowColorBrush}"
+            BorderThickness="0,1,0,0" Background="{DynamicResource SystemAltMediumColorBrush}">
+        <Grid ColumnDefinitions="Auto,Auto,*,Auto" Height="48">
+            <StackPanel Grid.Column="0" Orientation="Horizontal" Spacing="4" VerticalAlignment="Center">
+                <Button Content="▶" Command="{Binding PlayPauseCommand}" Width="36" Height="36" FontSize="16"/>
+                <Button Content="⏹" Command="{Binding StopCommand}" Width="36" Height="36" FontSize="16"/>
+            </StackPanel>
+
+            <StackPanel Grid.Column="2" Margin="12,0" VerticalAlignment="Center" Spacing="2">
+                <Slider Minimum="0"
+                        Maximum="{Binding Duration, Converter={StaticResource DurToSlider}}"
+                        Value="{Binding CurrentPosition}"
+                        IsEnabled="{Binding HasFile}"/>
+                <Grid ColumnDefinitions="Auto,*,Auto">
+                    <TextBlock Grid.Column="0" Text="{Binding CurrentPosition, Converter={StaticResource PosFmt}}"
+                               FontSize="11" Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+                    <TextBlock Grid.Column="2" Text="{Binding Duration, Converter={StaticResource DurFmt}}"
+                               FontSize="11" Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+                </Grid>
+            </StackPanel>
+
+            <StackPanel Grid.Column="3" Orientation="Horizontal" Spacing="12" VerticalAlignment="Center" Margin="0,0,12,0">
+                <TextBlock Text="{Binding CurrentFileName}"
+                           MaxWidth="200" TextTrimming="CharacterEllipsis"
+                           FontSize="12" VerticalAlignment="Center"/>
+                <Slider Value="{Binding Volume}" Minimum="0" Maximum="1" Width="80"
+                        IsEnabled="{Binding HasFile}"/>
+            </StackPanel>
+        </Grid>
+    </Border>
+</UserControl>

src/GUI/Views/PlayerBarView.axaml.cs

@@ -0,0 +1,11 @@
+using Avalonia.Controls;
+
+namespace GUI.Views;
+
+public partial class PlayerBarView : UserControl
+{
+    public PlayerBarView()
+    {
+        InitializeComponent();
+    }
+}

src/GUI/Views/ScanProgressView.axaml

@@ -0,0 +1,47 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:GUI.ViewModels"
+             xmlns:converters="using:GUI.Converters"
+             xmlns:l10n="using:GUI.Converters"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             mc:Ignorable="d"
+             x:Class="GUI.Views.ScanProgressView"
+             x:DataType="vm:ScanProgressViewModel">
+    <Design.DataContext>
+        <vm:ScanProgressViewModel/>
+    </Design.DataContext>
+
+    <UserControl.Resources>
+        <converters:HalfDoubleConverter x:Key="HalfDouble"/>
+        <converters:MiddleTruncateConverter x:Key="MiddleTruncate"/>
+    </UserControl.Resources>
+
+    <Border Padding="16" Background="{DynamicResource SystemBaseLowColorBrush}" CornerRadius="8"
+            Width="{Binding $parent[Window].Width, Converter={StaticResource HalfDouble}}">
+        <StackPanel Spacing="8">
+            <TextBlock Text="{Binding StatusText}" FontWeight="SemiBold" FontSize="13" TextWrapping="Wrap"/>
+            <ProgressBar Minimum="0" Maximum="100" Value="{Binding Progress}" Height="8"/>
+            <StackPanel Orientation="Horizontal" Spacing="2">
+                <TextBlock Text="{l10n:Localize Processed}" FontSize="11"
+                           Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+                <TextBlock Text="{Binding ProcessedFiles}" FontSize="11"
+                           Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+                <TextBlock Text=" / " FontSize="11"
+                           Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+                <TextBlock Text="{Binding TotalFiles}" FontSize="11"
+                           Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+            </StackPanel>
+            <StackPanel Orientation="Horizontal" Spacing="12">
+                <TextBlock Text="{Binding AddedText}" FontSize="11"
+                           Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+                <TextBlock Text="{Binding SkippedText}" FontSize="11"
+                           Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+            </StackPanel>
+            <TextBlock Text="{Binding CurrentFile, Converter={StaticResource MiddleTruncate}, ConverterParameter=60}"
+                       FontSize="11"/>
+            <Button Content="{l10n:Localize Close}" Command="{Binding DismissCommand}"
+                    IsVisible="{Binding HasError}" HorizontalAlignment="Right"/>
+        </StackPanel>
+    </Border>
+</UserControl>

src/GUI/Views/ScanProgressView.axaml.cs

@@ -0,0 +1,11 @@
+using Avalonia.Controls;
+
+namespace GUI.Views;
+
+public partial class ScanProgressView : UserControl
+{
+    public ScanProgressView()
+    {
+        InitializeComponent();
+    }
+}

src/GUI/Views/TagTreeView.axaml

@@ -0,0 +1,54 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:GUI.ViewModels"
+             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:l10n="using:GUI.Converters"
+             mc:Ignorable="d"
+             x:Class="GUI.Views.TagTreeView"
+             x:DataType="vm:TagTreeViewModel">
+    <Design.DataContext>
+        <vm:TagTreeViewModel/>
+    </Design.DataContext>
+
+    <Grid RowDefinitions="Auto,*">
+        <StackPanel Orientation="Horizontal" Margin="8,8,8,4" Spacing="4">
+            <TextBlock Text="{l10n:Localize Browse}" FontWeight="Bold" FontSize="14" VerticalAlignment="Center"/>
+            <Button Content="⟳" Command="{Binding LoadDataCommand}" ToolTip.Tip="{l10n:Localize Refresh}"
+                    Width="28" Height="28" HorizontalAlignment="Right"/>
+        </StackPanel>
+
+        <ScrollViewer Grid.Row="1">
+            <StackPanel Spacing="2" Margin="8,0,8,8">
+                <Button Content="{l10n:Localize AllFiles}" Command="{Binding ClearFilterCommand}"
+                        HorizontalAlignment="Stretch" HorizontalContentAlignment="Left"
+                        Height="28" Margin="0,0,0,4"/>
+
+                <TextBlock Text="{l10n:Localize Category}" FontWeight="SemiBold" Margin="0,8,0,2" FontSize="12"
+                           Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+
+                <ListBox ItemsSource="{Binding CategoryNodes}"
+                         SelectedItem="{Binding SelectedNode}"
+                         Height="200">
+                    <ListBox.ItemTemplate>
+                        <DataTemplate x:DataType="vm:TagTreeNode">
+                            <TextBlock Text="{Binding Name}" Padding="4,2"/>
+                        </DataTemplate>
+                    </ListBox.ItemTemplate>
+                </ListBox>
+
+                <TextBlock Text="{l10n:Localize Tags}" FontWeight="SemiBold" Margin="0,8,0,2" FontSize="12"
+                           Foreground="{DynamicResource SystemBaseMediumColorBrush}"/>
+
+                <ListBox ItemsSource="{Binding KeywordNodes}"
+                         SelectedItem="{Binding SelectedNode}">
+                    <ListBox.ItemTemplate>
+                        <DataTemplate x:DataType="vm:TagTreeNode">
+                            <TextBlock Text="{Binding Name}" Padding="4,2"/>
+                        </DataTemplate>
+                    </ListBox.ItemTemplate>
+                </ListBox>
+            </StackPanel>
+        </ScrollViewer>
+    </Grid>
+</UserControl>

src/GUI/Views/TagTreeView.axaml.cs

@@ -0,0 +1,11 @@
+using Avalonia.Controls;
+
+namespace GUI.Views;
+
+public partial class TagTreeView : UserControl
+{
+    public TagTreeView()
+    {
+        InitializeComponent();
+    }
+}

src/Resonance.sln.DotSettings.user

@@ -1,6 +1,11 @@
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+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AGUI_002EViewModels_002EScanProgressViewModel_002Eg_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003FLibrary_003FApplication_0020Support_003FJetBrains_003FRider2026_002E1_003Fresharper_002Dhost_003FSourcesCache_003Fbb74b3c6eaaeb5d783f31310eae5345eba75596a_003FGUI_002EViewModels_002EScanProgressViewModel_002Eg_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AGUI_002EViewModels_002EScanProgressViewModel_002EStartScan_002Eg_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003FLibrary_003FApplication_0020Support_003FJetBrains_003FRider2026_002E1_003Fresharper_002Dhost_003FSourcesCache_003F1a6f588df342309187674fcc524512a9a4a46540_003FGUI_002EViewModels_002EScanProgressViewModel_002EStartScan_002Eg_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AGUI_002EViewModels_002EScanProgressViewModel_002EStartScan_002Eg_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003Fvar_003Ffolders_003F5b_003F4wt_005Fpwy11fz5nkdv7s47r3780000gn_003FT_003FSourceGeneratedDocuments_003F8E641B210524A46B7DCD4502_003FCommunityToolkit_002EMvvm_002ESourceGenerators_003FCommunityToolkit_002EMvvm_002ESourceGenerators_002ERelayCommandGenerator_003FGUI_002EViewModels_002EScanProgressViewModel_002EStartScan_002Eg_002Ecs_002Fz_003A2_002D1/@EntryIndexedValue">ForceIncluded</s:String>
+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AGUI_002EViewModels_002EScanProgressViewModel_002EStartScan_002Eg_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003FLibrary_003FApplication_0020Support_003FJetBrains_003FRider2026_002E1_003Fresharper_002Dhost_003FSourcesCache_003F1a6f588df342309187674fcc524512a9a4a46540_003FGUI_002EViewModels_002EScanProgressViewModel_002EStartScan_002Eg_002Ecs_002Fz_003A2_002D0/@EntryIndexedValue">ForceIncluded</s:String>
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+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AIRelayCommand_007BT_007D_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003FLibrary_003FApplication_0020Support_003FJetBrains_003FRider2026_002E1_003Fresharper_002Dhost_003FSourcesCache_003F49f2a292ecb417be1f61c426de242e503b4371a346bf5b68a843b462337e62_003FIRelayCommand_007BT_007D_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
 	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AOSPlatform_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003FLibrary_003FApplication_0020Support_003FJetBrains_003FRider2026_002E1_003Fresharper_002Dhost_003FSourcesCache_003F9e988c941e6515999ebab7336243c87df16e340b8faeb57b5f562d2b8a7c2c_003FOSPlatform_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
 	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003ATrack_002Ecs_002Fl_003A_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003F_002E_002E_003FLibrary_003FApplication_0020Support_003FJetBrains_003FRider2026_002E1_003Fresharper_002Dhost_003FSourcesCache_003F872a20b9878a835418db772627eab53c29e04a65284443b02d35345255649a3a_003FTrack_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
 	
@@ -24,9 +29,16 @@
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   &lt;/TestAncestor&gt;
 &lt;/SessionState&gt;</s:String>
-	<s:Boolean x:Key="/Default/ResxEditorPersonal/CheckedGroups/=GUI_002FAssets_002FLocale/@EntryIndexedValue">True</s:Boolean>
+	<s:String x:Key="/Default/Environment/UnitTesting/UnitTestSessionStore/Sessions/=7a0de69d_002D085d_002D444a_002D9fbe_002D33683c7b6cab/@EntryIndexedValue">&lt;SessionState ContinuousTestingMode="0" IsActive="True" Name="DatabaseTests" xmlns="urn:schemas-jetbrains-com:jetbrains-ut-session"&gt;
+  &lt;TestAncestor&gt;
+    &lt;TestId&gt;xUnit::24F92458-FB39-44BE-A32F-41275183AF1B::net10.0::Core.Tests.DatabaseTests&lt;/TestId&gt;
+  &lt;/TestAncestor&gt;
+&lt;/SessionState&gt;</s:String>
+	<s:Boolean x:Key="/Default/ResxEditorPersonal/CheckedGroups/=GUI_002FAssets_002FLocale/@EntryIndexedValue">False</s:Boolean>
+	<s:Boolean x:Key="/Default/ResxEditorPersonal/CheckedGroups/=GUI_002FAssets_002FLocale/@EntryIndexRemoved">True</s:Boolean>
 	<s:Boolean x:Key="/Default/ResxEditorPersonal/CheckedGroups/=GUI_002FLocale/@EntryIndexedValue">False</s:Boolean>
 	<s:Boolean x:Key="/Default/ResxEditorPersonal/CheckedGroups/=GUI_002FLocale/@EntryIndexRemoved">True</s:Boolean>
 	<s:Boolean x:Key="/Default/ResxEditorPersonal/CheckedGroups/=GUI_002FResources1/@EntryIndexedValue">False</s:Boolean>
 	<s:Boolean x:Key="/Default/ResxEditorPersonal/CheckedGroups/=GUI_002FResources1/@EntryIndexRemoved">True</s:Boolean>
-	<s:Boolean x:Key="/Default/ResxEditorPersonal/Initialized/@EntryValue">True</s:Boolean></wpf:ResourceDictionary>
+	<s:Boolean x:Key="/Default/ResxEditorPersonal/Initialized/@EntryValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/ResxEditorPersonal/ShowComments/@EntryValue">False</s:Boolean></wpf:ResourceDictionary>