fix-solvelisted

# Solve (三步法 Step 3) After finding root cause: 1. Write a test that reproduces the bug (if possible) 2. Make the minimal fix — change as little as possible 3. Run the test — confirm it passes 4. Run all other tests — confirm nothing else broke 5. Verify the original symptom is gone Rules: - Minimal fix. Don't refactor while fixing. - If the fix is a one-liner, that's ideal. - If the fix requires restructuring, discuss with user first. - After fixing, activate fix-explain to tell user what happened.