fix(frontend): adjust dataset detail page's alignment and padding

[xuang7]

What changes were proposed in this PR?

This PR fixes some UI alignment issues on the dataset detail page:

• status tag icons not being centered within their colored background boxes.
• redundant margins on the file preview area.
• vertical misalignment between the version selector and the download button.
• unnecessary left padding on the version storage section.
• redundant margins on upload progress containers.

Current layout (extra padding on file preview):

New layout:

New version section:

current	updated

Any related issues, documentation, discussions?

Resolves #4583

How was this PR tested?

Manually tested

Was this PR authored or co-authored using generative AI tooling?

Generated-by: Claude Opus 4.7

[xuang7]

This PR is a small layout fix. It would be good if it could be included in the release. No functionality changes, so it's safe to include or skip. Could you help review? Thanks! @bobbai00

[bobbai00]

LGTM

[bobbai00]

@xuang7 can you raise another PR that backport this change to the branch release/v1-1-0-incubating and assign me as the reviewer?

[aglinxinyuan]

Do we want to merge this PR into the release branch and merge the release branch into main after the release? (without deleting the release branch)

@Yicong-Huang, what do you think? Any other way to avoid duplicate PRs?

This comment is not blocking. Feel free to raise another PR that backports this change.

[Yicong-Huang]

@Yicong-Huang, what do you think? Any other way to avoid duplicate PRs?

see #4580 I am building up a CI to use a backport label on PR to automatically merge both into main and the target release branch. If the label is added, CIs against the target release PR will ideally be run on the PR. stay tuned.