The custom display name feature added in cd627f33c had a critical bug where
the backend successfully stored custom names but the frontend never received
them, making the feature appear non-functional.
Root cause:
- DockerHost.CustomDisplayName was stored in backend state (models.go:201)
- SetDockerHostCustomDisplayName() correctly updated the field
- BUT DockerHostFrontend struct was missing customDisplayName field
- AND ToFrontend() converter didn't copy CustomDisplayName
- Result: WebSocket state broadcasts stripped out the custom name
When users edited a Docker host display name:
- API returned 200 OK ✓
- Success notification appeared ✓
- Edit state cleared ✓
- But subsequent state broadcasts lacked customDisplayName ✗
- UI continued showing original name ✗
Fix:
- Add CustomDisplayName field to DockerHostFrontend (models_frontend.go:105)
- Copy d.CustomDisplayName in ToFrontend() converter (converters.go:204)
- Now custom display names properly propagate to frontend via WebSocket
The feature now works as originally intended - custom names persist across
agent reconnections and display correctly in the UI.
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