Release v4.106.0

Added

• Screen composition corpus now records working-branch harnesses with exact Stage, Studio, Scene, and Screenplay branch heads, commands, statuses, and release-switch rules for full-app screens parity. (part of #168) (part of #173)
• Working-branch assertions now cover Stage screen planning, Studio Screenplay transport, Studio native Play metadata, Scene form geometry, browser native controls, and MCP revision-edit transcript expectations. (part of #168) (part of #173)

Changed

• Screenplay interoperability documentation now distinguishes working-branch evidence from final released-vector execution for the screens corpus. (part of #168) (part of #173)