Scale/Set layer to Canvas Size

Add right-click or Transform options bar commands such as:

• Fit to Canvas — scale proportionally to fit within canvas bounds
• Fill Canvas — scale proportionally to fully cover the canvas
• Stretch to Canvas — scale non-proportionally to exactly match canvas width & height

This would be a huge time-saver for compositing, mockups, and batch workflows.

Currently, Free Transform (Ctrl+T) treats the layer's own size as 100%, so there's no quick way to scale it to the canvas. We have to manually calculate percentages or type in the canvas dimensions in pixels. Premiere Pro already offers convenient Scale to Frame Size / Set to Frame Size commands — Photoshop needs the same!