WIP: GUI

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。

src/Core/Database.cs

@@ -464,5 +464,87 @@ 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 != '';";
+        var rows = connection.Query<string>(sql);
+        var allKeywords = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+        foreach (var row in rows)
+        {
+            if (string.IsNullOrWhiteSpace(row)) continue;
+            foreach (var 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
 }