fix: [Test failure] TC-00314 clear selected unit button on subsection button click

[saraburns1]

When unit analytics button is active, clicking the subsection analytics button should deeactivate the unit button and reset sidebar to subsection dashboards
When subsection analytics button is active, clicking it again should deactivate the subsection button and reset the sidebar to course dashboards

Screen.Recording.2025-12-01.at.4.26.23.PM.mov

Closes openedx/wg-build-test-release#542

[codecov]

Codecov Report

❌ Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 47.92%. Comparing base (9d50d2e) to head (26f354b).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/components/SubSectionAnalyticsButton.tsx	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #104      +/-   ##
==========================================
- Coverage   48.50%   47.92%   -0.58%     
==========================================
  Files          15       15              
  Lines         334      338       +4     
  Branches       64       66       +2     
==========================================
  Hits          162      162              
- Misses        162      166       +4     
  Partials       10       10              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[brian-smith-tcril]

LGTM!

[brian-smith-tcril]

Just verifying this exists (it does)

frontend-plugin-aspects/src/hooks.ts

Lines 142 to 144 in e8d7b45

	setFilterUnit: (value: Block | null) => {
	state.filterUnit.set(value);
	},