[7231] Override default duplicate file handling in UploadDialogContainer

[jvega190]

#7231

Summary by CodeRabbit

• Bug Fixes
  • Improved duplicate file handling during uploads by allowing duplicate selections to proceed to the upload list for later processing.

[coderabbitai]

Walkthrough

UploadDialogContainer adds an Uppy onBeforeFileAdded callback that always returns true, deferring duplicate-file validation to the later file-addition workflow.

Changes

Upload dialog file handling

Layer / File(s)	Summary
Uppy duplicate-file callback studio-ui/ui/app/src/components/UploadDialog/UploadDialogContainer.tsx	The Uppy configuration accepts duplicate files during the initial file-addition check. Later workflow logic performs validation.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Suggested reviewers: jmendeza

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly and concisely describes the main change: overriding default duplicate file handling in UploadDialogContainer.
Description check	✅ Passed	The description provides the required ticket reference and matches the pull request objective.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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