refactor(server): apply rustfmt and clippy suggestions

Formatting pass across simulation, perception, knowledge, NPC, and
test modules. Includes two clippy fixes in monologue.rs (.values()
instead of for (_, v) pattern).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/perception/vision_cone.rs

@@ -138,8 +138,7 @@ pub fn apply_vision_cone(
 ) -> Vec<(i32, i32, VisibilitySector)> {
     fov.visible_tiles()
         .filter_map(|(x, y)| {
-            classify_tile(observer_x, observer_y, x, y, facing, config)
-                .map(|sector| (x, y, sector))
+            classify_tile(observer_x, observer_y, x, y, facing, config).map(|sector| (x, y, sector))
         })
         .collect()
 }