Fix/unfollow button #519

[riyanshigupta890-cloud]

Pull Request Template 🚀

Description

Fixes the unfollow button not working on the Friends page. The previous implementation used a single atomic writeBatch containing both the follow/unfollow document write and a distributed shard counter update for global stats. If the shard counter write failed (e.g. due to Firestore security rules restricting writes to the aggregates collection), the entire batch failed atomically — silently blocking the actual follow/unfollow action too, with the error only logged to the console.

This PR splits the two operations: the core follow/unfollow document write (delete on unfollow, set on follow) now happens independently and must succeed for the button to work. The shard counter update is now best-effort and non-blocking — its failure no longer prevents follow/unfollow from working.

Related Issue

Closes #519

Type of Change

• Bug fix (non-breaking change which fixes an issue)

Screenshots / Videos (if applicable)

Testing Done

• Command run: npm run test
• Command run: npm run lint
• Command run: npm run build
• Visual verification on local dev server (http://localhost:5173)

Steps to reproduce/verify:

1. Go to Friends page, click "Follow" on a suggested developer.
2. Confirm they now appear under the "Following" tab.
3. Click the follow button again (now showing "Following") to unfollow.
4. Confirm the developer is removed from "Following" and the button reverts to "Follow".
5. Checked browser console for errors during both actions.

Checklist

• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings or console errors.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• Any dependent changes have been merged and published in downstream modules.

Contributor Declaration

• I confirm that this contribution is made under the rules of GSSoC 2026 and NSoC 2026.
• I confirm that I have been assigned the related issue by a maintainer before opening this PR.
• I have read the Contributing Guidelines and Code of Conduct.

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Project	Deployment	Actions	Updated (UTC)
ranker-hub	Ready	Preview, Comment	Jun 14, 2026 6:23pm