Remove integration tests in config_extended_test.go that duplicate unit tests in config_test.go for findLocalCheatpath. Remove redundant fuzz functions (FuzzFindLocalCheatpathNearestWins, FuzzTagsStress), a duplicate parse test (TestParseInvalidYAML), and a permanently-skipped interactive test (TestPromptIntegration). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>