chore: remove unused Optional import from main.py

[devin-ai-integration]

chore: remove unused Optional import from main.py

Summary

Removes the unused from typing import Optional import on line 28 of main.py. Optional is never referenced in any type annotation, function signature, or expression in this file. It was a speculative import from initial code generation.

Review & Testing Checklist for Human

• Confirm Optional is not referenced elsewhere in main.py (e.g. in string annotations or comments that would break)

Notes

• Candidate ID: fd2c7d268a60
• Devin Session
• Requested by: bot_apk

[devin-ai-integration]

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