Create visual freezer cards with fill bars

[olsonjp]

Current state

Fullness shown as just a number ("57% Full") with no visualization.

Solution

Replace banner cards with denser grid (3-4 cards per row at 1920px). Each card should show:

• Name, type (LN2 / -80 / -20 / 4°C / RT)
• Labeled progress bar with %
• Used / total capacity
• Last activity timestamp
• Alarm state
• "View contents" affordance (whole card clickable)

Color-code: ≤70% green, 70–90% amber, >90% red.

Priority

P1