Enhance authentication and authorization components

- Refactored `AppAuth` to introduce `getGuardContextSchema` for improved user context handling.
- Updated `Authenticator` to utilize `pickKeys` for user data extraction in JWT generation.
- Enhanced `Guard` class to improve permission checks and error handling.
- Modified `SystemController` to return context schema alongside permissions in API responses.
- Added new `permissions` method in `SystemApi` for fetching permissions.
- Improved UI components with additional props and tooltip support for better user experience.

app/src/ui/components/buttons/Button.tsx

@@ -5,13 +5,15 @@ import { twMerge } from "tailwind-merge";
 import { Link } from "ui/components/wouter/Link";
 
 const sizes = {
+   smaller: "px-1.5 py-1 rounded-md gap-1 !text-xs",
    small: "px-2 py-1.5 rounded-md gap-1 text-sm",
    default: "px-3 py-2.5 rounded-md gap-1.5",
    large: "px-4 py-3 rounded-md gap-2.5 text-lg",
 };
 
 const iconSizes = {
-   small: 12,
+   smaller: 12,
+   small: 14,
    default: 16,
    large: 20,
 };