uploads: refactor /uploads/:id page for multi-file uploads.

test/factories/upload.rb

@@ -9,16 +9,18 @@ FactoryBot.define do
 
     factory(:completed_source_upload) do
       status { "completed" }
-      upload_media_assets { [build(:upload_media_asset)] }
+      media_asset_count { 1 }
+      upload_media_assets { [build(:upload_media_asset, source_url: "https://example.com/file.jpg", status: "active")] }
     end
 
     factory(:completed_file_upload) do
       status { "completed" }
       source { nil }
+      media_asset_count { 1 }
       file { Rack::Test::UploadedFile.new("#{Rails.root}/test/files/test.jpg") }
 
       upload_media_assets do
-        [build(:upload_media_asset, media_asset: build(:media_asset, file: "test/files/test.jpg"))]
+        [build(:upload_media_asset, media_asset: build(:media_asset, file: "test/files/test.jpg"), source_url: "file://test.jpg", status: "active")]
       end
     end
   end

test/factories/upload_media_asset.rb

@@ -2,5 +2,6 @@ FactoryBot.define do
   factory(:upload_media_asset) do
     upload
     media_asset
+    source_url { FFaker::Internet.http_url }
   end
 end