Add RTL tests for the PendingValidations urgency-sort queue

[1nonlypiece]

📌 Description

src/pages/PendingValidations.tsx is the verifier's working queue. It sorts
pending tasks by daysRemaining and toggles between ascending/descending
urgency, reads from the Zustand useVerifierStore, and navigates into
ValidationDetail. It has no test file, so the sort toggle, empty-queue
state, and row navigation are untested.

This issue adds RTL coverage for the pending validations queue.

Goal: test the urgency sort toggle, empty state, and row-to-detail
navigation with the store mocked.

🎯 Requirements and Context

• Mock useVerifierStore (src/Zustand/Store.ts) to supply a set of
  ValidationTasks with varied daysRemaining.
• Assert default sort order, that toggling reverses it, and that the toggle label
  updates (High to Low ↔ Low to High).
• Assert the "All caught up!" empty state when there are no pending validations.
• Assert clicking a row navigates to the corresponding ValidationDetail route.

🛠️ Suggested Execution

1. Create a branch

git checkout -b feature/test-pending-validations

2. Implement changes

• Tests: add src/pages/__tests__/PendingValidations.test.tsx using RTL,
  MemoryRouter, and a mocked store + useNavigate.

3. Test and commit

• Run npm run test from the repo root.
• Cover edge cases: empty queue, single task, ties in daysRemaining, toggle
  twice returns to original order.

Example commit message

test: add RTL coverage for PendingValidations queue

✅ Guidelines

• Minimum 95% test coverage on PendingValidations.tsx.
• Clear, behavior-focused test names.
• Timeframe: 96 hours.

🏷️ Labels

type-testing · area-frontend · MAYBE REWARDED · GRANTFOX OSS ·
OFFICIAL CAMPAIGN

💬 Community & Support

• Join the Disciplr contributor Discord to coordinate and get unblocked fast:
  https://discord.gg/xvNAvMJf
• Please introduce yourself before you start so we can avoid duplicate work.

[Mystery-CLI]

I have read through the required implementations and understand what to do can i work on it?

[grantfox-oss]

🦊 GrantFox — @Mystery-CLI has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #136)
2. Your PR will be reviewed by the Disciplr-Org maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign campaign!

@Mystery-CLI's PR #160 was approved and merged by @1nonlypiece.

🏆 @Mystery-CLI: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (258 total points). Track your full progress on GrantFox.

👏 Great work, @Mystery-CLI! Keep contributing to Disciplr-Org.