feat(api): add compact=true param for slim single-row streak card

[vbarik317-droid]

Closes #5724.

Summary

Adds a compact=true query param to /api/streak that renders a slim, single-row version of the streak card (280×100px) instead of the full 3D isometric grid. Useful for narrow README layouts and sidebar badges.

Changes

• types/index.ts: added compact?: boolean to BadgeParams
• app/api/streak/route.ts: parses compact from the query string and passes it through to the badge params
• lib/svg/generator.ts: added generateCompactSVG() and branched generateSVG() to call it early when params.compact is true, before the expensive tower computation runs

Behavior

• compact=true → renders username + 🔥 current streak count in a slim card, no isometric towers
• compact omitted → full isometric card renders unchanged (no regression)
• Existing bg, accent, text, and font params are sanitized and applied the same way as the full card, so theming stays consistent

Testing

Tested locally with npm run dev + curl:

• /api/streak?user=octocat&compact=true → 280×100 slim card
• /api/streak?user=octocat → unchanged 600×420 full card
• /api/streak?user=octocat&compact=true&bg=1a1a2e&accent=ff6b35&text=eaeaea → theme overrides apply correctly

Checklist

• compact=true triggers slim card render
• All theme/color params still apply
• Full card renders when compact is omitted
• Correct viewBox dimensions for compact layout

[vercel]

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[vbarik317-droid]

Fix: streakParamsSchema already validated year correctly, but the route wasn't using the parsed value — it fell back to raw searchParams.get('year') for the date math, so invalid years slipped through. Now using the validated value consistently. Added a route-level test for year=2099 → 400.
@JhaSourav07 ready for review/merge when you get a chance, thanks!

[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	3694.34 KB	3694.34 KB	0 B
Total CSS	296.06 KB	296.06 KB	0 B

[Aamod-Dev]

This is a great feature! The compact=true parameter gives users much-needed flexibility for integrating the streak card in tighter layouts like repository README sidebars. Bypassing the expensive isometric tower computation in generateSVG when params.compact is true is also a smart performance optimization. Approved!

[github-actions]

🎉 Congratulations @vbarik317-droid! Your PR has been successfully merged. 🚀

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