test(notification-management-token): add unit test coverage (empty-fallback, massive-scaling)

[ARPANPATRA111]

Description

Fixes #5935

Adds comprehensive test coverage for lib/notification-management-token.ts — the security-critical module handling notification token creation (cryptographic random generation), SHA-256 hashing, extraction from request sources, and timing-safe verification.

Files added

• lib/notification-management-token.empty-fallback.test.ts (26 tests):

  • createNotificationManagementToken(): prefix/format validation, minimum length, uniqueness
  • hashNotificationManagementToken(): hex output format, determinism, empty string handling
  • getNotificationManagementToken(): header/body/query extraction, priority order (header > body > query), non-string/empty/whitespace body handling, trimming, fallback from managementToken to token query param
  • verifyNotificationManagementToken(): null/empty/undefined inputs, invalid hash format, valid round-trip, mismatched token rejection

• lib/notification-management-token.massive-scaling.test.ts (5 tests):

  • 10,000-char token hashing
  • Unicode/emoji token hashing
  • 1000 round-trip verifications
  • 1000 unique token generation
  • 100 unique hash generation

Pillar

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

Checklist before requesting a review:

• I have read the CONTRIBUTING.md file.
• I have tested these changes locally.
• 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.
• I have started the repo.
• I have made sure that i have only one commit to merge in this PR.

[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	3628.47 KB	3628.47 KB	0 B
Total CSS	284.92 KB	284.92 KB	0 B

[ARPANPATRA111]

@Aamod007 @souravjhahind @JhaSourav07 review and merge

[Aamod007]

Difficulty: intermediate – Adds notification-management-token tests for empty fallback and massive scaling scenarios.

Quality: clean – Edge case & scaling tests.

Type: testing – Robustness coverage.

Solid scaling tests!