QR code feature — optional local library
========================================

Linkjet generates QR codes for your short links entirely in the browser, with
NO external/CDN calls (required for the WordPress.org plugin directory).

To enable the feature, drop a QR library named exactly:

    qrcode.min.js

into this folder (wp-content/plugins/linkjet/admin/assets/).

It must expose a global `QRCode` constructor, e.g. the widely used, MIT-licensed
"qrcodejs" by David Shim:

    https://github.com/davidshimjs/qrcodejs   (file: qrcode.min.js)

License: MIT — GPL-compatible, so it may be bundled with this GPL plugin.

When the file is present, a QR button appears on every link row. When it is
absent, the QR feature is simply hidden — nothing breaks, and no external
request is ever made.
