[Frontend] Render container ports and creation dates

[rodriguecyber]

Scope

Frontend only. Assume the container API already returns ports and createdAt; do not modify agent or server code in this issue.

Problem

The container table currently renders a dash for Ports and Created even though the API will provide real values.

Tasks

• Extend frontend Container types with ports and createdAt.
• remove mock badges on the Ports and Created table header
• Render published ports in a compact readable format.
• Render a consistent human-readable creation date.
• Show None or an equivalent empty state when no ports are published.
• Keep row actions, filtering, inspection, and log behavior unchanged.

Acceptance criteria

• Published ports are visible in the table.
• Containers with no ports have a clear empty value.
• Invalid or missing timestamps do not break rendering.
• Add focused formatting or component tests.

Related API issue

The protocol and backend response changes are tracked separately.