Nachet Frontend Chore: migrate functions to arrow syntax

For style consistency and scope consistency for 'this' we need to migrate traditional function definitions in frontend/ to arrow syntax.

Ref this issue for PRs
Update one module at a time.

Start by inspecting the frontend/ directory and choose one module, as the issue requests updating one module at a time. Identify its traditional function definitions, check nearby usage for scope-sensitive behavior, and run the relevant frontend checks if available. Done means that module's eligible functions use arrow syntax without changing behavior.

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