Show project dates on Gantt project rows

Gantt project rows can now reflect a project's configured start and end dates, even when the project has no dated child actions. When dated child work extends beyond the project range, the row spans the combined period, preserving the existing rollup while making project-level dates visible.

Open a project in Gantt view to see its project dates reflected on the project row alongside dated child work.

This helps project managers and portfolio teams compare the planned project window with the underlying schedule more clearly.