Introduced a "loading" div to indicate when admin assets are being fetched. Updated rendering logic and styles in related components to account for this state. Prepared groundwork for potential view transitions.
Replaced `getMiddleware` with `onServerInit` for streamlined middleware registration. Updated `AppAuth` to automatically register its authentication middleware. Added a test case to verify middleware registration. Removed redundant cookie renewal logic from `AdminController` and made related adjustments across modules.
