style(simulation): gate bounce — fmt wrap + clippy needless_range_loop

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

server/src/atlas/district_profile.rs

@@ -2188,7 +2188,9 @@ fn lake_from_hydrology_at(ta: &TerrainAnalysis, px: f64, py: f64) -> (bool, i32)
             0
         } else {
             let depth = (filled - original).max(0.0);
-            ((depth / basin_max_depth) * 100.0).round().clamp(0.0, 100.0) as i32
+            ((depth / basin_max_depth) * 100.0)
+                .round()
+                .clamp(0.0, 100.0) as i32
         }
     } else {
         0

server/src/atlas/hydrology_equilibrium.rs

@@ -417,13 +417,13 @@ pub fn solve(
     // built from — walked directly here rather than through `basins` to
     // avoid a second clone of every basin's cell list.
     let mut basin_max_depth_scaled = vec![0i64; n];
-    for b in 0..basin_count {
-        let max_depth = basin_cells[b]
+    for cells in basin_cells.iter().take(basin_count) {
+        let max_depth = cells
             .iter()
             .map(|&c| (filled[c] - original[c]).max(0))
             .max()
             .unwrap_or(0);
-        for &c in &basin_cells[b] {
+        for &c in cells {
             basin_max_depth_scaled[c] = max_depth;
         }
     }