feat(themes): add sakura and midnight_ember theme presets for enhanced user experience

[nandhanay]

Description

Fixes #8973
Added sakura and midnight_ember theme presets to themes.ts and updated the README.md theme gallery.

Pillar

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

Visual Preview

Added to theme presets array. Will be visible via ?theme=sakura and ?theme=midnight_ember.

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.

[vercel]

@nandhanay is attempting to deploy a commit to the jhasourav07's projects Team on Vercel.

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[retenta-bot]

This PR adds new theme presets to improve user customization options. It's worth noting that similar past decisions focused on enhancing theme rendering based on user preferences, which significantly improved user experience by addressing issues with theme visibility on first visits. Your contribution aligns well with these efforts. Thank you for your work on this, and I look forward to your updates!

[github-actions]

🚨 Hey @nandhanay, the CI Pipeline is failing on this PR and it has been marked as status:blocked.

Please fix the issues before this can be reviewed. Here's how:

1. Run checks locally before pushing:

npm run format:check   # Check Prettier formatting
npm run lint           # Run ESLint
npm run typecheck      # TypeScript type check
npm run test           # Run unit tests (Vitest)
npm run build          # Verify production build passes

2. Auto-fix common issues:

npm run format         # Auto-fix formatting with Prettier
npm run lint -- --fix  # Auto-fix lint errors where possible

3. Check the full failure log here:
👉 View CI Run

Once you push a fix and the CI passes, the status:blocked label will be removed automatically. 💪

[Aamod007]

These new themes (\sakura\ and \midnight_ember) look beautiful! However, the main CI pipeline (\Format · Lint · Typecheck · Test) is failing. Please fix the build errors so we can merge these in!

[github-actions]

⚠️ Hey @nandhanay, this pull request has been inactive for 3 days. It will be automatically closed in 2 days if no further activity occurs.

If you are still working on this, please push your latest changes or leave a comment to keep it active.

[Aamod007]

These are beautiful additions to our theme catalog! The color palettes for \sakura\ and \midnight_ember\ look well-balanced and complement our existing lineup perfectly. Updating \ hemes.ts, \ hemes.test.ts, and the documentation all together shows great attention to detail.

Labels applied:

• type:design: Adds new visual theme presets for user customization.
• level:beginner: Straightforward dictionary additions and test count updates.
• quality:clean: Simple, accurate, and completely documented.