Cleanup Feature Progress

Clean up PROGRESS.md for a completed feature, leaving only essential completion information.

Purpose

After a feature is fully complete, validated, and reviewed, consolidate all the detailed progress notes into a concise completion summary. This keeps PROGRESS.md maintainable while preserving critical information for future reference.

Step 1: Read PROGRESS.md

MANDATORY FIRST STEP:

1. Read PROGRESS.md
2. Identify the feature section to clean up (usually the most recent one)
3. Extract key information:
   • What was the feature about
   • What tests passed
   • What manual tests weren't performed or didn't pass
   • How the core functionality was validated