fix: close dashboard context panels on route exit

[KenkoGeek]

Summary

Close any open resource context panels when the FleetOps dashboard route is exited so a place details panel does not remain visible after navigating to Places.

The cleanup is attached to Ember's Route#deactivate hook, which only runs when the route is fully exited, rather than reacting to every route change.

Fixes fleetbase/fleetbase#458

Testing

• Added a regression test for operations/orders/index route teardown
• pnpm lint
• pnpm build
• pnpm exec ember test --test-port 0 --module "Unit | Route | operations/orders/index" --reporter tap

References

• Ember Route lifecycle: https://api.emberjs.com/ember/release/classes/route/methods/deactivate?anchor=deactivate
• Uses the existing resource-context-panel.closeAll() API from @fleetbase/ember-ui

[roncodes]

This works but I'm not sure this is the appropriate fix to the issue, I will need to investigate further on the correct approach. This seems to work for one section of the module, and the implementation is catch-all for the operations route. It might need a proper fix from the context-panel service itself. Will update after digging a bit deeper.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.99%. Comparing base (7f581a3) to head (394fc6a).

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #332   +/-   ##
=========================================
  Coverage     99.99%   99.99%           
  Complexity    11936    11936           
=========================================
  Files           583      583           
  Lines         44892    44892           
=========================================
  Hits          44891    44891           
  Misses            1        1           

Flag	Coverage Δ
backend	99.99% <ø> (ø)

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