test: add data-testid attributes to key UI elements for automated testing #56

[YAM1234-B]

Overview

Resolves #56

This PR adds data-testid attributes to key UI elements across the component files to make the codebase ready for automated E2E testing (Playwright / Cypress) and component integration testing (React Testing Library).

Changes

Added data-testid attributes to the following elements without introducing any visual or functional modifications:

Component	Element / Role	data-testid value
FileUpload.tsx	Drag & Drop Zone Container	file-upload-zone
VideoEditor.tsx	Main Export Button	export-button
ExportOverlay.tsx	Export Progress Bar	export-progress
DownloadResult.tsx	Download Video Link	download-button
DownloadResult.tsx	Restart / "New" Button	reset-button
ExportSettings.tsx	CRF Quality Slider Input	quality-slider
AudioSpeedControl.tsx	Speed Playback Slider Input	speed-slider

Verification

• Linting: Ran npm run lint successfully.
• Tests: Ran npm run test run to run the Vitest suite. All 115 tests passed without regressions.

---

Checklist

• All listed elements have correct data-testid attributes
• Tested locally and confirmed no visual/functional regressions

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[github-actions]

👋 Thanks for your PR, @YAM1234-B!

Welcome to Reframe — a browser-based video editor built for everyone 🎬

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• Linked the issue this PR closes (e.g. Closes #123)
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[github-actions]

✅ PR Format Check Passed — @YAM1234-B

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[magic-peach]

Thanks for the contribution! Another open PR (#1741: feat: add data-testid attributes to key UI elements for automated testing) tackles the same issue and is a bit further along (cleaner CI / no merge conflicts), so I'm consolidating there to keep review focused in one place. Closing this one — no reflection on the work itself, just avoiding split review across duplicates. Feel free to bring anything over to #1741 if it adds something that one doesn't have yet!