Work area details recover from connection failures

Transport errors loading work area details now show a toast instead of crashing the app.

Bug Fixes

Scope-target detail reads on the work-areas tab now gracefully handle network failures. When a load fails — whether you're offline or close the panel mid-request — the app displays a helpful toast message instead of crashing with an unhandled rejection. You can retry by reopening the panel or sheet. The success path remains unchanged.