Add lighting presets to 3D effects

Squashed from #3442 onto main.

docs/mcp.md

@@ -1440,6 +1440,24 @@ See [Revolve](revolve.md) for the scope and limitations.
 {"name":"run_command","arguments":{"command":"effect.expandAppearance","params":{}}}
 ```
 
+## 3D lighting presets
+
+`effect.lightingPreset {index: int, preset: "standard" | "diffuse" | "topLeft" | "right", item?, ids?, target?}`
+replaces the lighting rig and ambient of an existing Revolve, Extrude & Bevel, Inflate or Rotate
+effect. `item: null` addresses object-level effects; an item index addresses a fill/stroke's
+effects. All targets must have a 3D effect at `index`, otherwise nothing changes. The operation
+is one undo step and preserves Shading, geometry, source paint and the view.
+
+The four original rigs use one white front light at 80% intensity. Standard keeps the existing
+default; Diffuse uses 100% Softness and 35% Ambient Light, Top Left uses Rotation 135 and Height
+45, and Right uses Rotation 0 and Height 30. Full values and the public behavior reference are in
+[3D lighting presets](three-d.md#presets). These are original settings, not imported preset files.
+The document stores their numeric settings; manual edits remain possible through `effect.setParams`.
+
+```json
+{"name":"run_command","arguments":{"command":"effect.lightingPreset","params":{"index":0,"item":null,"preset":"topLeft"}}}
+```
+
 ## Extrude & Bevel, Inflate and Rotate
 
 `effect.apply {effect: "threeD.extrude" | "threeD.inflate" | "threeD.rotate", params: {...}, ids?, item?}` applies