test: Add Code Coverage Reports with Istanbul

[SujalTripathi]

Description

No code coverage tracking exists. We can't tell which parts
of the codebase are tested and which aren't.

Requirements

• Configure Istanbul/NYC for coverage reporting
• Set 80% coverage target (lines, functions, branches)
• Generate HTML coverage report locally
• Add coverage badge to README
• Block PRs that drop coverage below 80%
• Integrate with GitHub Actions CI

Acceptance Criteria

• Coverage reports generate with npm run test:coverage
• Coverage badge in README
• CI fails if coverage drops below 80%

Tech Involved

jest --coverage, istanbul, codecov or coveralls

@Bindu2020324 please assign me these issue

[armaansingh2048]

Hi @Bindu2020324 ,
I’d like to work on this issue under NSoC 2026. The feature aligns with my interest in improving user experience and React-based development. Could you please assign this issue to me?

Thank you!

[Bindu2020324]

Hlo @armaansingh2048 , please share an update if you are still working on it.

[armaansingh2048]

@Bindu2020324 gimme till eot I'll get it done ,I'm on it

[HarshMrigank]

i @Bindu202324,

I'd like to work on this issue. The issue appears to have been inactive for over a week, and there doesn't seem to be any recent progress or linked PR.

Could you please assign this issue to me if it's currently available? I have reviewed the requirements and acceptance criteria and can start working on the Istanbul/NYC coverage integration, coverage thresholds, CI checks, and README badge updates.

Thanks.