bug-fix

DSH Desktop（Windows）内置 pwsh/shell 空结果 bug 修复 + pwsh_direct 直启兜底工具

dsh-reprolab — a deterministic bug-proof executor for DeepSeek Harness: frozen repro tests, RED/GREEN/REGRESSION gates, and replayable evidence. Complements session-level discipline plugins such as dsh-doublecheck.