feat: integrate PortIndicators into RackDevice

[ggfevans]

Parent Epic

Part of #71 (Network Interface Visualization and Connectivity)

Summary

Wire up the PortIndicators component into RackDevice.svelte, passing interface data from device types.

Acceptance Criteria

• Import PortIndicators into RackDevice.svelte
• Pass device.interfaces to PortIndicators
• Pass current rackView prop
• Position component after device content, before drag overlay (layer 3.5)
• Add onPortClick handler that emits port selection event
• Conditionally render only when device.interfaces?.length > 0
• Respect global "show ports" toggle (if implemented)

Integration Point

Insert after line ~336 in RackDevice.svelte (after device content block):

{#if device.interfaces?.length > 0}
  <PortIndicators
    interfaces={device.interfaces}
    deviceWidth={deviceWidth}
    deviceHeight={deviceHeight}
    rackView={rackView}
    onPortClick={handlePortClick}
  />
{/if}

Dependencies

• feat: PortIndicators SVG component #249 (PortIndicators component)

References

• RackDevice structure: src/lib/components/RackDevice.svelte