test: Enhance ControlsPanel with error resilience coverage

[deepsikha-dash]

Description

Fixes #6868

Pillar

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

Visual Preview

N/A

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.

[retenta-bot]

This PR aims to improve the error resilience of the ControlsPanel, which is a crucial aspect of maintaining a robust user experience. It is similar to previous decisions made regarding the calculateStreak function, where dead code was removed to enhance functionality and accuracy. Ensuring that components handle errors gracefully is vital for overall application stability. Thank you for your contribution, and I look forward to your updates on the checklist!

[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	3975.85 KB	3975.85 KB	0 B
Total CSS	331.16 KB	331.16 KB	0 B