feat: improve admin build (#14485)

#### PR Dependency Tree


* **PR #14485** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Chores**
  * Admin static assets now served under /admin for self-hosted installs
  * CLI is directly executable from the command line
  * Build tooling supports a configurable self-hosted public path
  * Updated admin package script for adding UI components
* Added a PostCSS dependency and plugin to the build toolchain for admin
builds

* **Style**
* Switched queue module to a local queuedash stylesheet, added queuedash
Tailwind layer, and scoped queuedash styles for the admin UI

* **Bug Fixes**
  * Improved error propagation in the Electron renderer
* Migration compatibility to repair a legacy checksum during native
storage upgrades

* **Tests**
  * Added tests covering the migration repair flow
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/admin/src/global.css

@@ -1,5 +1,7 @@
 @config '../tailwind.config.js';
 
+@layer properties, theme, base, components, utilities, queuedash;
+
 @import 'tailwindcss';
 @import 'tailwindcss/utilities';
 @import '@toeverything/theme/style.css';