PRBLEM Airmail Notice

PRBLEM Airmail Notice adds visually distinctive airmail notice boxes to WordPress posts and pages without cron jobs, background workers or external services.

Features:
* Gutenberg block with notice type, icon, icon position and icon size controls.
* Gutenberg action buttons for downloads and custom links.
* Apply saved notice templates from the Gutenberg sidebar.
* Classic Editor TinyMCE toolbar button with the bundled Plus Box Multiple Outline icon.
* 10 bundled notice icons included with the plugin.
* Add custom icons from Settings > PRBLEM Airmail Notice using the WordPress Media Library.
* Ready notice types: Update, Warning, Info, Tip, Important, Correction and Download.
* Icon position selector: top-right or top-left.
* Icon size selector: 32, 40, 48 or 56 px.
* Editable badge, title, description, footer label and highlighted value.
* Optional download button. Choose a file from the WordPress Media Library or paste a URL.
* Optional custom link button with custom text and new-tab behavior.
* Save reusable templates from Classic Editor and use them again in Gutenberg.
* Manage/delete saved templates from Settings > PRBLEM Airmail Notice.
* Dark/night-mode support for common theme classes.
* Responsive mobile layout.
* Front-end stylesheet is loaded only when Airmail Notice markup is present in the queried posts.
* No WP-Cron tasks, background jobs, tracking or external API requests.