fix(extrude): commit typed height from dynamic input on Enter

ExtrudeCommand never opted into dyn_commit_as_text(), so a typed
Enter fell through to generic point-resolution instead of
on_text_input, producing a near-zero height that silently failed
to commit. Mirror PresspullCommand's pattern, gated to the Height
step.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/modules/insert/solid3d_cmds.rs

@@ -472,6 +472,9 @@ impl CadCommand for ExtrudeCommand {
     fn dyn_live_value(&self, cursor: DVec3) -> Option<f64> {
         Some((cursor - self.anchor).dot(self.profile_direction?))
     }
+    fn dyn_commit_as_text(&self) -> bool {
+        self.step == ExtrudeStep::Height
+    }
     fn is_selection_gathering(&self) -> bool {
         self.step == ExtrudeStep::Pick
     }