Linux-Only Build

This version is built as a Linux-only binary. All process.platform detection has been replaced with hardcoded "linux" values (via switch ("linux") replacing switch (process.platform)). The Windows and macOS code paths remain in the bundle as dead code but are unreachable. Specific impacts:

• Computer use is restricted: "createCliExecutor called on linux. Computer control is macOS-only."
• Windows PowerShell process introspection has been removed
• macOS-specific clipboard image handling has been removed
• Platform-specific update URLs will only return Linux paths
• Voice mode's Windows-specific check has been removed (the feature itself still requires the native audio module)
• The native installer reports "Unsupported architecture: x64" because architecture detection is also hardcoded

This is a build-time artifact of the npm package targeting Linux. macOS and Windows users should use the native installer for their platform rather than the npm package.