Neeraj Fix Chart Rendering Issue and Dark Mode Legend

[Neeraj-Kondaveeti]

Description

INITIAL TASK DESCRIPTION:

CHANGES REQUESTED:

Related PRS (if any):

This frontend PR is related to the Development Backend PR.

This PR is hotfix for #4896

Main changes explained:

• Fixed an issue where the Hiring Analytics chart was not rendering.
• Updated API filter handling to allow fetching all roles when no roles are selected.
• Fixed dark mode legend display by replacing text-based indicators with styled color blocks to correctly match chart bars.

How to test:

1. check into current branch
2. do npm install and ... to run this PR locally
3. Clear site data/cache
4. log as admin user
5. Navigate to: http://localhost:5173/applicant-volunteer-ratio
6. Verify:
   • Chart loads correctly and does not get stuck on "Loading..."
7. Toggle dark mode:
   • Legend colors should match chart bars (blue for Total Applications, green for People Hired)
   • Legend should be clearly visible and readable

Screenshots or videos of changes:

Note:

• This PR specifically addresses post-merge feedback related to chart rendering and dark mode legend visibility

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[sonarqubecloud]

Quality Gate passed

Issues
3 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[rajanidi1999]

working as expected and im approving the PR

[one-community]

Thank you all, merging!

[Anusha-Gali]

Hi Neeraj,

I have reviewed your PR locally and the application loads and legends are displayed as per requirement.