Summary

Implement the fix for the Windows production icon issue identified in #62. The current Windows icon asset/pipeline appears to produce a blue/fallback box in production builds, likely due to an incomplete or improperly generated .ico asset.

Goals

• Replace/regenerate the Windows .ico asset with a proper multi-resolution icon
• Verify the Windows installer/executable/tile assets remain correctly wired
• Validate the change does not break macOS or Linux icon behavior
• Document validation steps and outcome

Scope

• Update Windows icon assets used by the editor packaging pipeline
• Verify config references remain correct
• Add any lightweight validation/documentation needed for future builds

Depends On

• Investigate and fix Windows app icon showing blue box in production #62 root-cause investigation

Acceptance Criteria

• Windows build uses a proper multi-size icon asset
• No config regressions for installer/exe/taskbar/tile icon references
• macOS/Linux icon assets are not broken by the change
• Ticket and/or PR documents validation