Add live controls to the depth viewer

[temiroff]

Summary

• relay the selected DepthViewer raw frame.bin through the local editor server
• decode and render metric depth in the browser canvas
• show near/far, auto-range, palette, and missing-pixel controls below the live image
• persist display settings and redraw immediately without recooking
• keep ROS2 and the Jetson as raw transport only

Verification

• python -m pytest tests -q (755 passed, 8 skipped, 62 subtests passed)
• npm run build

Managed Runtime release

No Runtime release is required. The relay and canvas renderer are editor/editor-server behavior and do not alter the managed device bundle.