wincu v0.4.1

wincu 0.4.1 - fork of dsh-computer-use-win.nn- 16 merged MCP entries over 60+ legacy toolsn- policy layer: red lines, approvals, observation binding, point-ownership and focus guards (fail-closed)n- correctness: cmd-start launch chain, layered target resolution, activation ladder, element-text fallback, real cropped filesn- performance: prewarm, caching, 6s -> 0.4s stability probe, pixel hashing, no temp files in hash moden- tests: 4 static guards, 36-case surface test, 7 upstream suitesnnMIT. Original engine (c) cgissing; DSH integration (c) Yu-tao-Li; fork changes (c) dxxCaO.