fix: add onUploadStart prop to be called when a file upload started

[tomrndom]

ref: https://app.clickup.com/t/86b9n7p5w

Signed-off-by: Tomás Castillo tcastilloboireau@gmail.com

Summary by CodeRabbit

Release Notes

• New Features
  • Added optional onUploadStart callback to the file upload component, triggering when upload begins and enabling custom behavior independent of completion events.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 41ae16b4-1f00-429c-8e04-13428125acf7

📥 Commits

Reviewing files that changed from the base of the PR and between 9b8531e and 0697857.

📒 Files selected for processing (1)

• src/components/inputs/upload-input-v3/index.js

📝 Walkthrough

Walkthrough

UploadInputV3 gains an optional onUploadStart callback prop (default null). It is destructured from the component's props and invoked with the file argument inside handleAddedFile when the first upload item is added, before existing upload progress handling.

Changes

onUploadStart callback for UploadInputV3

Layer / File(s)	Summary
onUploadStart prop declaration and invocation src/components/inputs/upload-input-v3/index.js	Adds onUploadStart = null to props destructuring and calls onUploadStart(file) inside handleAddedFile when the callback is provided.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

A bunny hops in, file in paw,
"Upload begins!" it says with awe.
onUploadStart now rings the bell,
Before the progress bars can swell.
🐇✨ Small change, but oh so well!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding an onUploadStart prop to the UploadInputV3 component that is invoked when file uploads begin.
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.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/upload-v3-on-upload-start

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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@src/components/inputs/upload-input-v3/index.js`:
- Around line 142-145: The handleAddedFile callback uses the onUploadStart prop
but the useCallback hook has an empty dependency array, causing the callback to
capture a stale reference to onUploadStart that won't update when the prop
changes. Add onUploadStart to the dependency array of the useCallback in the
handleAddedFile function to ensure the latest prop value is always captured.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: cb918a50-1ac7-40a2-9ca9-2a533ab27cb9

📥 Commits

Reviewing files that changed from the base of the PR and between 8cf6c39 and 9b8531e.

📒 Files selected for processing (1)

• src/components/inputs/upload-input-v3/index.js