More #363 work, relative paths for attachments when uploading

plugs/editor/upload.ts

@@ -23,17 +23,16 @@ async function saveFile(file: UploadFile) {
     // root folder case
     prefix = "";
   }
-  const suggestedName = prefix + file.name;
 
   const finalFileName = await editor.prompt(
     "File name for pasted attachment",
-    suggestedName,
+    file.name,
   );
   if (!finalFileName) {
     return;
   }
   await space.writeAttachment(
-    finalFileName,
+    prefix + finalFileName,
     file.content,
   );
   let attachmentMarkdown = `[${finalFileName}](${encodeURI(finalFileName)})`;
@@ -46,4 +45,4 @@ async function saveFile(file: UploadFile) {
 export async function uploadFile(_ctx: any, accept?: string, capture?: string) {
   const uploadFile = await editor.uploadFile(accept, capture);
   await saveFile(uploadFile);
-}
+}