Add Markdown import and code block copy to vault notes.

Support bulk .md/.txt import into the current notebook folder and add hover copy buttons on note code blocks in edit and preview modes.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/readTextFile.ts

@@ -0,0 +1,26 @@
+export async function readTextFile(file: File): Promise<string> {
+  const buf = await file.arrayBuffer();
+  const bytes = new Uint8Array(buf);
+
+  let encoding: string = "utf-8";
+  let offset = 0;
+
+  if (bytes.length >= 2 && bytes[0] === 0xff && bytes[1] === 0xfe) {
+    encoding = "utf-16le";
+    offset = 2;
+  } else if (bytes.length >= 2 && bytes[0] === 0xfe && bytes[1] === 0xff) {
+    encoding = "utf-16be";
+    offset = 2;
+  } else if (
+    bytes.length >= 3 &&
+    bytes[0] === 0xef &&
+    bytes[1] === 0xbb &&
+    bytes[2] === 0xbf
+  ) {
+    encoding = "utf-8";
+    offset = 3;
+  }
+
+  const decoder = new TextDecoder(encoding);
+  return decoder.decode(bytes.slice(offset));
+}