Deep - Fix - Volunteer status pie chart

[deep3072]

Description

Added a new pie chart to show Total Mentors next to Total Volunteer pie chart

Related PRS (if any):

To test this backend PR you need to checkout the #4138 frontend PR.

Main changes explained:

• Added mentor statistics to the existing volunteer analytics flow: getVolunteerStatsData now calls a new helper for mentor counts and returns a mentorNumberStats block alongside the volunteer numbers (reportsController.js).
• Built getMentorNumberStats in overviewReportHelper.js; it mirrors the volunteer aggregation but filters role: 'Mentor', counting Active/New/Deactivated mentors and computing percentages plus optional comparison deltas.
• Exposed getMentorNumberStats in the helper’s export so other code can consume the same mentor breakdown whenever needed.

How to test:

1. Check into deep-fix-volunteer-status-pie-chart branch in the backend.
2. Check into deep-fix-volunteer-status-pie-chart branch in frontend and run it to test.
3. Run npm install, and ... to run this PR locally.
4. Clear site data/cache.
5. Log in as Admin user.
6. Go to dashboard→ Reports→ Total Org Summary
7. Verify if the Total Mentors Chart is properly loaded or not.
8. Verify the count is changing as per date filters.

Screenshots or videos of changes:

Before:

Screen.Recording.2025-09-28.at.14.46.46.mov

After:

Screen.Recording.2025-09-28.at.14.41.37.mov

[ChiragBellara]

Reviewed the working of PR #1759
The API's work as expected and the screen loads with all the correct information.

Also, added relevant comments to the frontend PR #4138

[laynet]

Reviewed PR #1759. I followed the testing instructions and logged in as admin user running the frontend with PR #4138. The graph loads as expected and displays the correct data when the date filters are used with a significant lag. I’ve also reviewed the frontend.

[akshith312]

Provided Feedback on related FE PR 4138.

[laharinandipati]

Working as expected. Checked the frontend. No rendering needed

[Aswin20010]

Tested the new Mentor Status Pie Chart under Reports → Total Org Summary. Verified data rendering from mentorNumberStats, correct alignment beside the volunteer chart, and consistent count updates based on date filters. Confirmed the connector lines and pill-shaped callouts render correctly using externalLabelGuidesPlugin.js. Checked layout spacing, responsiveness, and dark mode — all functioning as expected. Approved the Frontend and related Backend PR.

[Aditya-gam]

• Reviewed this PR by testing the frontend on localhost and left a review requesting changes on the frontend PR #4138.
• Backend properly returns the data to the client site, but there is an issue with data aggregation.
• New mentors who remain active are counted twice: once in "active" AND once in "new," inflating the total and making percentages misleading (e.g., 3 new active mentors → counted as 6 in the total).

• This same issue exists for the volunteer status donut chart too, and I have tried to fix it in these PRs: #4191 + #1794
• Test Video:

TestVideo.mov

[one-community]

Thank you all, merging!

[deep3072]

• Backend properly returns the data to the client site, but there is an issue with data aggregation.

Hi @Aditya-gam, good observation. I've made the changes. Thanks

addressed