frontend: components: video-manager: VideoStreamCreationDialog: Fix form state reset

[joaoantoniocardoso]

This is a backport from #3855 into 1.4

Summary by Sourcery

Bug Fixes:

• Fix stale form state in the video stream creation dialog when reopening it after changes.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Adds a watcher on the show prop in VideoStreamCreationDialog to reset the form state whenever the dialog is opened, ensuring the form is reinitialized from the current stream data on each open.

Sequence diagram for dialog open triggering form reset in VideoStreamCreationDialog

sequenceDiagram
  actor User
  participant ParentComponent
  participant VideoStreamCreationDialog
  participant Form

  User->>ParentComponent: clickOpenVideoStreamDialog()
  ParentComponent->>VideoStreamCreationDialog: set prop show = true
  activate VideoStreamCreationDialog
  VideoStreamCreationDialog->>VideoStreamCreationDialog: watch show(newVal)
  alt newVal is true
    VideoStreamCreationDialog->>VideoStreamCreationDialog: resetFormFromStream()
    VideoStreamCreationDialog->>Form: initializeFromCurrentStream()
  end
  deactivate VideoStreamCreationDialog

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Class diagram for VideoStreamCreationDialog with show watcher

classDiagram
  class VideoStreamCreationDialog {
    <<VueComponent>>
    +boolean show
    +any settings
    +VForm form
    +resetFormFromStream()
  }

  class VideoStreamCreationDialogWatchers {
    +show(newVal boolean)
  }

  VideoStreamCreationDialog ..> VideoStreamCreationDialogWatchers : watch

  class VForm {
    +initializeFromCurrentStream()
  }

  VideoStreamCreationDialog --> VForm : uses ref form

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File-Level Changes

Change	Details	Files
Ensure the video stream creation dialog form reinitializes from the current stream whenever the dialog is shown.	Introduce a watch section in the Vue component to observe the show prop. Call resetFormFromStream() inside the watcher when show becomes true so the form state is refreshed on open.	core/frontend/src/components/video-manager/VideoStreamCreationDialog.vue

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[joaoantoniocardoso]

Closing: the watch block already exists on 1.4.