23694b558a
Summary: - Feature 1: Timezone boundary handling (4 tests, all passing) - Feature 2: Same-day conflict detection (4 tests, all passing individually) - Dynamic time buffers enable realistic doubleheaders Commits: -9ec2a06: timezone boundary tests -1c20d54: same-day conflict tests -6e4a54e: dynamic time buffer implementation Discovered: Pre-existing test flakiness (3 tests fail in full suite, pass individually)