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

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	tanstack-com	92fbe06	Commit Preview URL Branch Preview URL	Jul 17 2026, 04:12 AM

[coderabbitai]

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Review skipped

Review was skipped as selected files did not have any reviewable changes.

💤 Files selected but had no reviewable changes (1)

• src/hooks/useMutation.ts

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Configuration used: defaults

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Run ID: 54b86f35-047c-4d47-8b72-63172aa539aa

📥 Commits

Reviewing files that changed from the base of the PR and between 2bf0994 and 92fbe06.

📒 Files selected for processing (1)

• src/hooks/useMutation.ts

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✨ Finishing Touches

🧪 Generate unit tests (beta)

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

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