fix: use original-fs to bypass Electron asar interception

src/main/updater.ts

@@ -1,5 +1,7 @@
 import { get as httpsGet } from 'https';
-import { createReadStream, createWriteStream, writeFileSync, renameSync, unlinkSync, existsSync, mkdirSync } from 'fs';
+// Use original-fs to bypass Electron's asar interception — required for
+// writing/renaming .asar files in the resources directory.
+import { createReadStream, createWriteStream, writeFileSync, renameSync, unlinkSync, existsSync, mkdirSync } from 'original-fs';
 import { join, dirname } from 'path';
 import { createHash } from 'crypto';
 import { spawn } from 'child_process';