style(simulation): cargo fmt on the T-1174 batch (gate bounce)

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

server/src/atlas/believability.rs

@@ -336,10 +336,7 @@ pub fn analyze(
         );
         let (mut relief_lo, mut relief_hi, mut relief_dry) = (i32::MAX, i32::MIN, 0i32);
         for &co in &RELIEF_TRANSECT_CHUNK_OFFSETS {
-            let cpos = (
-                district_origin_chunk.0 + co,
-                district_origin_chunk.1 + co,
-            );
+            let cpos = (district_origin_chunk.0 + co, district_origin_chunk.1 + co);
             let cctx = derive_chunk_context(world_seed, body_id, prof, cpos, None);
             let tx = cpos.0 * CHUNK_M + CHUNK_M / 2;
             let ty = cpos.1 * CHUNK_M + CHUNK_M / 2;

server/src/atlas/district_profile.rs

@@ -2240,10 +2240,7 @@ mod tests {
             None,
         );
 
-        assert_eq!(
-            districts[&cell_east].basin_direction,
-            BasinDirection::East
-        );
+        assert_eq!(districts[&cell_east].basin_direction, BasinDirection::East);
         assert_eq!(
             districts[&cell_south].basin_direction,
             BasinDirection::South
@@ -3147,7 +3144,11 @@ mod tests {
         let districts = derive_all_districts(test_seed(), &params, &ta, 8, "test_body", None, None);
         // BTreeMap iterates in sorted key order — verify the first key is (0,0).
         let first = districts.keys().next().expect("at least one district");
-        assert_eq!(*first, SurveyCellPos(0, 0), "first district must be at origin");
+        assert_eq!(
+            *first,
+            SurveyCellPos(0, 0),
+            "first district must be at origin"
+        );
     }
 
     #[test]

server/src/atlas/gen_queue.rs

@@ -756,7 +756,10 @@ pub(crate) fn resolve_settlement_morphology_zone(
     heightmap: &crate::atlas::heightmap::BodyHeightmap,
 ) -> Option<crate::simulation::generator::MorphologyZone> {
     let params = body_params?;
-    let (_l1, ta) = terrain_cache.lock().unwrap().get_or_derive(body_id, heightmap);
+    let (_l1, ta) = terrain_cache
+        .lock()
+        .unwrap()
+        .get_or_derive(body_id, heightmap);
     let climate = ClimateConstants::default();
     let profile = crate::atlas::district_profile::derive_at_metres(
         body_seed,

server/src/atlas/layer1.rs

@@ -27,7 +27,7 @@ use crate::atlas::body_world_state::{DrainageBasin, RiverNetwork};
 use crate::atlas::drainage::{self, DrainageResult};
 use crate::atlas::features::{self, TerrainAnalysis};
 use crate::atlas::heightmap::BodyHeightmap;
-use crate::atlas::scale::{BasinDirection, HEIGHTMAP_CELLS_PER_DISTRICT, SurveyCellPos};
+use crate::atlas::scale::{BasinDirection, SurveyCellPos, HEIGHTMAP_CELLS_PER_DISTRICT};
 use crate::atlas::subbiome;
 use crate::simulation::generator::{AttractorType, GeographicAttractor};
 use serde::{Deserialize, Serialize};

server/src/atlas/layer_proxy.rs

@@ -675,20 +675,8 @@ pub fn build_district_grid(
     if state.districts.is_empty() {
         return None;
     }
-    let cols = state
-        .districts
-        .keys()
-        .map(|p| p.0)
-        .max()
-        .unwrap_or(0) as u32
-        + 1;
-    let rows = state
-        .districts
-        .keys()
-        .map(|p| p.1)
-        .max()
-        .unwrap_or(0) as u32
-        + 1;
+    let cols = state.districts.keys().map(|p| p.0).max().unwrap_or(0) as u32 + 1;
+    let rows = state.districts.keys().map(|p| p.1).max().unwrap_or(0) as u32 + 1;
     let n = (cols * rows) as usize;
     let mut morphology = vec![0u8; n];
     let mut elev_q = vec![0u8; n];
@@ -2840,8 +2828,13 @@ mod tests {
 
         // The SAME survey-cell-centre world metres, resolved via the SAME
         // D-256(b) bridge function derive_district_profile uses internally.
-        let (world_x_m, world_y_m) =
-            district_profile::survey_cell_centre_world_m(cell, gcpr, ta.w, ta.h, params.body_radius_km);
+        let (world_x_m, world_y_m) = district_profile::survey_cell_centre_world_m(
+            cell,
+            gcpr,
+            ta.w,
+            ta.h,
+            params.body_radius_km,
+        );
 
         // Riparian equivalent: near_perennial_water_at against the same
         // RiverNetwork, same station spacing/cutoff derive_district_profile
@@ -2891,9 +2884,18 @@ mod tests {
         // returns the default; the wrapper post-call-overrides it.
         expected.basin_direction = basin;
 
-        assert_eq!(batch_profile.morphology_zone as u8, expected.morphology_zone as u8);
-        assert_eq!(batch_profile.tectonic_class as u8, expected.tectonic_class as u8);
-        assert_eq!(batch_profile.glaciation_grade as u8, expected.glaciation_grade as u8);
+        assert_eq!(
+            batch_profile.morphology_zone as u8,
+            expected.morphology_zone as u8
+        );
+        assert_eq!(
+            batch_profile.tectonic_class as u8,
+            expected.tectonic_class as u8
+        );
+        assert_eq!(
+            batch_profile.glaciation_grade as u8,
+            expected.glaciation_grade as u8
+        );
         assert_eq!(
             batch_profile.precipitation_class as u8,
             expected.precipitation_class as u8
@@ -2908,7 +2910,10 @@ mod tests {
             batch_profile.vegetation_class as u8,
             expected.vegetation_class as u8
         );
-        assert_eq!(batch_profile.basin_direction as u8, expected.basin_direction as u8);
+        assert_eq!(
+            batch_profile.basin_direction as u8,
+            expected.basin_direction as u8
+        );
     }
 
     /// D-256(c) invariant: the wrapper (`derive_district_profile`) ≡ core

server/src/atlas/plugin.rs

@@ -1507,7 +1507,10 @@ mod tests {
             SeedChain::for_body(0, "BodyX"),
             &heightmap,
         );
-        assert_eq!(zone, None, "no body_params → no resolution, caller keeps the stub");
+        assert_eq!(
+            zone, None,
+            "no body_params → no resolution, caller keeps the stub"
+        );
     }
 
     /// D-256(d): with real `body_params`, `resolve_settlement_morphology_zone`