Fix TSX Badge URL Extraction in ExportPanel

[tamilr0727-ux]

Description

Fixes badge download failures in ExportPanel.tsx when the export format is set to TSX by improving badge URL extraction to support all supported snippet formats.

Changes

• Updated badge URL extraction logic to correctly handle TSX export snippets.
• Extended parsing to support URLs embedded in JavaScript template literals in addition to the existing Markdown and HTML formats.
• Ensured download actions (SVG, PNG, and PDF) use the extracted badge URL regardless of the selected export format.
• Preserved existing behavior for Markdown and HTML snippets.
• Added regression tests covering all supported export formats.

Validation

Implemented tests covering:

• Successful URL extraction from Markdown snippets.
• Successful URL extraction from HTML snippets.
• Successful URL extraction from TSX template literal snippets.
• SVG, PNG, and PDF downloads using the extracted URL.
• Invalid or malformed snippets continuing to return an appropriate error instead of failing unexpectedly.

Verification

✅ vitest run passes successfully.
✅ Badge downloads work correctly for Markdown, HTML, and TSX export formats.
✅ Existing download functionality remains unchanged for previously supported formats.

Fixes #8769

Pillar

• 🎨 Pillar 1 — New Theme Design
• 📐 Pillar 2 — Geometric SVG Improvement
• 🕐 Pillar 3 — Timezone Logic Optimization
• 🛠️ Other (Bug fix, refactoring, docs)

Visual Preview

Can Check in the Files Changed Section.

Checklist before requesting a review:

• I have read the CONTRIBUTING.md file.
• I have tested these changes locally (localhost:3000/api/streak?user=YOUR_USERNAME).
• I have run npm run format and npm run lint locally and resolved all errors (CI will fail otherwise).
• My commits follow the Conventional Commits format (e.g., feat(themes): ..., fix(calculate): ...).
• I have updated README.md if I added a new theme or URL parameter.
• I have started the repo.
• I have made sure that i have only one commit to merge in this PR.
• The SVG output matches the CommitPulse "premium quality" aesthetic standard (no raw elements, smooth animations, correct fonts).
• (Recommended) I joined the CommitPulse Discord community for contributor discussions, mentorship, and faster PR support.

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[retenta-bot]

This PR addresses badge download failures by improving the URL extraction logic for TSX formats, ensuring compatibility with various snippet types. It also includes regression tests to maintain existing functionality. This aligns with our previous decisions to enhance testing and ensure robust handling of different formats. Thank you for your contributions!

[github-actions]

📦 Next.js Bundle Size Report (Gzipped Sizes)

✨ No significant bundle size changes detected.

📊 Summary of Totals

Category	PR Size	Base Size	Difference
Total JS	4939.25 KB	4939.27 KB	-0.01 KB (-0.00%)
Total CSS	348.46 KB	348.46 KB	0 B