Real-Time Device Readout Panel #381

Part of #373 Device Readouts:

Build a dedicated telemetry UI component displaying motor positions, setpoints, and live traces. This resolves the current limitation where users have to use external EPICS screens to track positions

Goals

Acceptance criteria : What journeys should the user be able to complete to consider your feature done
Be as specific as you can, check them off once they work. Add more if you find more requirements during development. Issue should only be considered done after all of them are checked

• [ ]. Device readout could go through csweblib for
  PV access (unknown); VISR uses PVWS for its UI.
• Continuous Telemetry during Scans: Telemetry coordinates and readbacks must update continuously even during active scan plans when BlueSky is busy.

Tasks

base on the goals, deduce the tasks required. check them off once they're done

• PV Polling/Subscription: Set up subscription streams to listen to PVs independent of the BlueSky control loop using pvws.
• UI Readout Panel: Design and layout a telemetry widget for selected devices based on Neeli's proposed design refinements.
• Traces & Limits Display: Render live positional traces and soft/hard limits for active devices.

Screen Shoot