Description:
Migrate the project’s package manager from Yarn to PNPM and upgrade all packages that do not introduce breaking changes.
Tasks:
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Replace Yarn with PNPM as the package manager
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Update lockfile to pnpm-lock.yaml
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Upgrade dependencies to latest safe (non-breaking) versions
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Ensure CI/CD pipeline uses PNPM
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Verify local development works correctly with PNPM