Implement the reviewed UI icon system and durable review workflow (#853)

Thanks @Nathan-Dane.

crates/engine/src/cmd/features_more.rs

@@ -28,7 +28,7 @@ pub static COMMANDS: &[CommandSpec] = &[
         .params("sketch, curves: [open curve ids, in order]; thickness (across the sketch plane); depth? (default: to the next face); flip?: bool (fill to the other side)"),
     CommandSpec::new("solid.web", "Web", web)
         .at("SOLID", "CREATE")
-        .icon("rib")
+        .icon("web")
         .params("sketch, curves: [open curve ids] (one wall each); thickness; depth? (default: to the next face); flip?: bool"),
     CommandSpec::new("solid.emboss", "Emboss", emboss)
         .at("SOLID", "CREATE")
@@ -36,11 +36,11 @@ pub static COMMANDS: &[CommandSpec] = &[
         .params("sketch, profiles?; depth; mode?: emboss|deboss; targets?; face?: world point [x,y,z] selecting a planar or complete exterior cylindrical wall (inferred when exactly one supported tangent cylinder matches the selected profiles)"),
     CommandSpec::new("solid.replace_face", "Replace Face", replace_face)
         .at("SOLID", "MODIFY")
-        .icon("offset_face")
+        .icon("replace_face")
         .params("faces: [[x,y,z] points on planar faces, or face names from model.faces]; target: plane (XY|XZ|YZ|construction plane|{origin, normal}) | target_face: [x,y,z] on a parallel planar face; body?"),
     CommandSpec::new("solid.align", "Align", align)
         .at("SOLID", "MODIFY")
-        .icon("move")
+        .icon("align")
         .params("bodies: [names]; from: [x,y,z] | {snap: vertex|edge_mid|face_center|circle_center, at: [x,y,z]} | from_face: [x,y,z]; to: (the same) | to_face: [x,y,z] (faces also turn to meet); flip?: bool"),
     CommandSpec::new("solid.remove", "Remove", remove).at("SOLID", "MODIFY").icon("delete").params("bodies: [names] (removed from here on in the timeline)"),
 ];