Release v7.15.0

Added

• Screenplay screen authoring guidance now covers component data-context bindings, exposed templates, manual form columns, packages/icons, hierarchical outlets, routes, toolbar dialogs, and support-level reporting. (part of #536)
• MCP screen authoring workflow now connects revision-checked proposal/apply editing with same-source validation, render, and runtime parity checks. (part of #536)

Changed

• Stage and render guidance now flags authored UI omissions and silent default composition as unsupported output rather than partial delivery. (part of #536)