Reworked the product page's `PipelineVisual` to match twenty-front's
kanban — board header, card layout/fields, hover states, and font
weights.
Also loaded and pinned Inter (twenty-front's product font) for the
app-preview mockups, which previously fell back to the system font.
<img width="879" height="625" alt="image"
src="https://github.com/user-attachments/assets/396f0a90-114b-47f9-92a6-2e74d732a91e"
/>
Abdullah.