Add waiting flag to workflow page

[MiyazonoKaori]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

The workflow page does not have any waiting flag. If the pre-processing is too long, I cannot know whether the work is executing normally or failing.

2. Additional context or comments

No response

3. Can you help us with this feature?

• [ ] I am interested in contributing to this feature.