style(simulation): gate bounce — cargo fmt

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

server/src/atlas/cascade.rs

@@ -301,15 +301,13 @@ pub fn run_cascade_from_heightmap(
                 name,
                 feature_type: layer1::FeatureNameType::River,
             })
-            .chain(
-                mountain_assignments
-                    .into_iter()
-                    .map(|(position, name)| layer1::FeatureNameAssignment {
-                        position,
-                        name,
-                        feature_type: layer1::FeatureNameType::Mountain,
-                    }),
-            )
+            .chain(mountain_assignments.into_iter().map(|(position, name)| {
+                layer1::FeatureNameAssignment {
+                    position,
+                    name,
+                    feature_type: layer1::FeatureNameType::Mountain,
+                }
+            }))
             .collect();
         snapshot.layer1 = Some(l1);
         snapshot.terrain_analysis = Some(ta);
@@ -607,9 +605,7 @@ mod tests {
         let river_attractor_count = l1
             .attractors
             .iter()
-            .filter(|a| {
-                a.attractor_type == crate::simulation::generator::AttractorType::RiverMouth
-            })
+            .filter(|a| a.attractor_type == crate::simulation::generator::AttractorType::RiverMouth)
             .count();
         let expected_river_assignments = river_attractor_count.min(river_names.len());
         let actual_river_assignments = l1