feat(api): add account workspaces and signed content events

server/src/WebDrop.Core/ShareService.cs

@@ -18,7 +18,7 @@ public sealed class ShareService(
             || !Codec.TryDecodeExact(req.OwnerHash, TokenHash.Size, out var ownerHash))
             throw new WebDropException(ErrorCode.BadRequest);
 
-        var settings = req.Settings ?? new ShareSettings();
+        var settings = req.Settings ?? CreationDefaults.Share(limits);
         settings.Validate(limits);
         long now = clock.NowMs;
         var share = new Share(id, settings, readHash, ownerHash, creatorEndpointHash, now,
@@ -102,6 +102,7 @@ public sealed class ShareService(
                     if (item is not null) throw new WebDropException(ErrorCode.BadRequest);
                     if (tx.CountShareItems(id) >= limits.MaxItemsLimit) throw new WebDropException(ErrorCode.TooLarge);
                     long cap = env.IsGated ? maxDownloads ?? share.Settings.FileMaxDownloads : 0;
+                    if (env.IsGated && !ServerSettingChoices.IsFileMaxDownloadsAllowed(cap, share.Settings.FileMaxDownloads)) throw new WebDropException(ErrorCode.BadRequest);
                     item = new ShareItem(id, env.ItemId, env.ItemFlags, cap, 0, 0, -1, null,
                         0, now, share.ExpiresAt, null);
                     tx.InsertShareItem(item);