Device-map: refresh visual layout

[unocelli]

Summary

This PR refreshes the Device Map UI to make the layout cleaner and more readable.

What changed

• redesigned device cards with a more modern visual structure
• added device type badges and icons per device category
• improved spacing, sizing, and horizontal alignment across server, flow, and device lanes
• reworked lane positioning logic to keep cards centered with consistent gaps

Notes

• this PR is mostly visual, but it also updates map positioning calculations to support the new layout
• no functional changes are intended for device configuration/edit flows