viewer layout variants + telemetry pill removal + camera2/3 monitor

- camera_panel macro: layout='full'/'stacked'/'compact' param for
  different explore/panner arrangements in wide vs control views
- status.html: add camera2 and camera3 monitor containers
- ui-core.js: drop badge/pill for string telemetry values

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>