Xshell window keepalive focus fix.
- Records the current foreground window before sending the keepalive command.
- Sends ls + Enter to the visible Xshell/XshellCore window.
- Restores the original foreground window immediately after the keepalive input.
Validation:
- go test ./... passed
- Rebuilt opsera.exe and opsera-skill.zip without UPX
SHA256:
- opsera.exe: 6e0384046f178d54736e67d56c2a0a5e8bfab93d3aa0d0140fbf48ab7bf07767
- opsera-skill.zip: 7763786424471ef7b1c9e4211f9583be292530a1360fd2b85776252fc4ebe272