🎨 Palette: Add focus visible styles to Order Fuel actions

[dhaatrik]

💡 What

Added explicit focus-visible styling (focus-visible:ring-2 focus-visible:ring-primary focus-visible:outline-none) to the interactive buttons within the OrderFuel component.

🎯 Why

Because the application uses a brutalist design system with complex borders and shadow changes on hover, the default browser focus ring was often insufficient or entirely overwritten on these buttons. This made keyboard navigation confusing as users couldn't clearly see which action they were focused on.

📸 Before/After

(See Playwright verification screenshots for demonstration)
Before: Keyboard tabbing to the quick amount selectors or primary buttons resulted in no visible change to the element.
After: Keyboard tabbing to the buttons now clearly outlines them with the primary theme color.

♿ Accessibility

Improved keyboard accessibility (WCAG 2.1 SC 2.4.7 Focus Visible) by ensuring all primary and secondary interactive elements in the crucial ordering flow have a highly visible focus indicator that works well with the existing custom styling.

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PR created automatically by Jules for task 8395701548949568402 started by @DhaatuTheGamer

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