fix: change upload name

infrastructure/Migrations/20260912132858_InitialCreate.Designer.cs

@@ -50,6 +50,10 @@ namespace mws.backend.dotnet.infrastructure.Migrations
                     b.Property<Guid>("ProjectId")
                         .HasColumnType("uuid");
 
+                    b.Property<string>("StorageKey")
+                        .HasMaxLength(512)
+                        .HasColumnType("character varying(512)");
+
                     b.Property<string>("Title")
                         .IsRequired()
                         .HasMaxLength(300)

infrastructure/Migrations/20260912132858_InitialCreate.cs

@@ -147,6 +147,7 @@ namespace mws.backend.dotnet.infrastructure.Migrations
                 {
                     Id = table.Column<Guid>(type: "uuid", nullable: false),
                     ProjectId = table.Column<Guid>(type: "uuid", nullable: false),
+                    StorageKey = table.Column<string>(type: "character varying(512)", maxLength: 512, nullable: true),
                     Title = table.Column<string>(type: "character varying(300)", maxLength: 300, nullable: false),
                     Description = table.Column<string>(type: "text", nullable: true),
                     Status = table.Column<string>(type: "character varying(20)", maxLength: 20, nullable: false),

infrastructure/Migrations/AppDbContextModelSnapshot.cs

@@ -47,6 +47,10 @@ namespace mws.backend.dotnet.infrastructure.Migrations
                     b.Property<Guid>("ProjectId")
                         .HasColumnType("uuid");
 
+                    b.Property<string>("StorageKey")
+                        .HasMaxLength(512)
+                        .HasColumnType("character varying(512)");
+
                     b.Property<string>("Title")
                         .IsRequired()
                         .HasMaxLength(300)

infrastructure/Persistence/Configuration/DocumentConfiguration.cs

@@ -13,6 +13,7 @@ public class DocumentConfiguration : IEntityTypeConfiguration<Document>
         e.Property(d => d.Title).HasMaxLength(300).IsRequired();
         e.Property(d => d.Type).HasConversion<string>().HasMaxLength(20);
         e.Property(d => d.ContentHash).HasMaxLength(64);
+        e.Property(d => d.StorageKey).HasMaxLength(512);
         e.Property(d => d.ContentSize);
         e.Property(d => d.UpdatedContentAt);
 

infrastructure/Storage/S3DocumentContentStore.cs

@@ -15,35 +15,45 @@ public class S3DocumentContentStore(
 {
     private string Bucket => opt.Value.Bucket;
 
-    private static string Key(Guid projectId, Guid documentId) => $"{projectId:N}/{documentId:N}.html";
-
-    public Task EnsureBucketAsync(Guid projectId, CancellationToken ct) => Task.CompletedTask;
-
-    public async Task UploadAsync(Guid projectId, Guid documentId, string contentType, Stream body, CancellationToken ct)
+    public static string FileNameNow(string name)
     {
+        var slug = new string(name.Trim().ToLowerInvariant()
+            .Select(c => char.IsLetterOrDigit(c) ? c : '-')
+            .ToArray()).Trim('-');
+        if (slug.Length == 0)
+        {
+            slug = "document";
+        }
+        return $"{slug}_{DateTime.UtcNow:yyyyMMddHHmmss}";
+    }
+
+    public async Task<string> UploadAsync(Guid projectId, string fileName, string contentType, Stream body, CancellationToken ct)
+    {
+        var key = $"{projectId:N}/{FileNameNow(fileName)}.html";
         try
         {
             await s3.PutObjectAsync(new PutObjectRequest
             {
                 BucketName = Bucket,
-                Key = Key(projectId, documentId),
+                Key = key,
                 InputStream = body,
                 ContentType = contentType,
                 AutoCloseStream = false,
             }, ct);
+            return key;
         }
         catch (AmazonS3Exception ex)
         {
-            log.LogError(ex, "MinIO upload failed for document {DocumentId}", documentId);
+            log.LogError(ex, "MinIO upload failed for {Key}", key);
             throw new StorageUnavailableException("Document upload failed", ex);
         }
     }
 
-    public async Task<Stream> DownloadAsync(Guid projectId, Guid documentId, CancellationToken ct)
+    public async Task<Stream> DownloadAsync(string storageKey, CancellationToken ct)
     {
         try
         {
-            var response = await s3.GetObjectAsync(Bucket, Key(projectId, documentId), ct);
+            var response = await s3.GetObjectAsync(Bucket, storageKey, ct);
             return response.ResponseStream;
         }
         catch (AmazonS3Exception ex) when (ex.StatusCode == HttpStatusCode.NotFound)
@@ -52,33 +62,20 @@ public class S3DocumentContentStore(
         }
         catch (AmazonS3Exception ex)
         {
-            log.LogError(ex, "MinIO download failed for document {DocumentId}", documentId);
+            log.LogError(ex, "MinIO download failed for {Key}", storageKey);
             throw new StorageUnavailableException("Document download failed", ex);
         }
     }
 
-    public async Task<bool> ExistsAsync(Guid projectId, Guid documentId, CancellationToken ct)
+    public async Task DeleteAsync(string storageKey, CancellationToken ct)
     {
         try
         {
-            await s3.GetObjectMetadataAsync(Bucket, Key(projectId, documentId), ct);
-            return true;
-        }
-        catch (AmazonS3Exception ex) when (ex.StatusCode == HttpStatusCode.NotFound)
-        {
-            return false;
-        }
-    }
-
-    public async Task DeleteAsync(Guid projectId, Guid documentId, CancellationToken ct)
-    {
-        try
-        {
-            await s3.DeleteObjectAsync(Bucket, Key(projectId, documentId), ct);
+            await s3.DeleteObjectAsync(Bucket, storageKey, ct);
         }
         catch (AmazonS3Exception ex)
         {
-            log.LogWarning(ex, "MinIO delete failed for document {DocumentId}", documentId);
+            log.LogWarning(ex, "MinIO delete failed for {Key}", storageKey);
         }
     }
 }