chore(hooks): remove unused 'useMutation' hook

[sukvvon]

Summary

• Remove src/hooks/useMutation.ts (useBaseMutation/useMutation), which had zero importers — every call site in the codebase uses useMutation from @tanstack/react-query instead.

Test plan

• pnpm test (tsc, lint, unit tests) passes

Summary by CodeRabbit

• Refactor
  • Removed legacy mutation-handling functionality, including form submission state, callback processing, error handling, redirects, and route refresh behavior.
  • Integrations relying on the previous mutation APIs may require updates.

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	tanstack-com	92c52c7	Commit Preview URL Branch Preview URL	Aug 02 2026, 06:40 AM

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 8c2f90ab-f307-4a6e-97ab-db13871bcc15

📥 Commits

Reviewing files that changed from the base of the PR and between 750479b and 92c52c7.

📒 Files selected for processing (1)

• src/hooks/useMutation.ts

💤 Files with no reviewable changes (1)

• src/hooks/useMutation.ts

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📝 Walkthrough

Walkthrough

The pull request deletes src/hooks/useMutation.ts. This removes useBaseMutation and useMutation, including mutation state, callbacks, form submission, error handling, redirects, and router invalidation.

Changes

Cohort / File(s)	Summary
Mutation hook removal src/hooks/useMutation.ts	Deletes the exported mutation hooks and their related mutation handling logic.

Estimated code review effort: 2 (Simple) | ~10 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the removal of the unused useMutation hook, which is the main change in the pull request.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/remove-unused-usemutation-hook

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