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/query.rs

@@ -62,8 +62,7 @@ impl PerceptionQuery for NaturalVision {
             z,
         );
 
-        let cone_tiles =
-            apply_vision_cone(&fov, observer_pos.x, observer_pos.y, facing, &config);
+        let cone_tiles = apply_vision_cone(&fov, observer_pos.x, observer_pos.y, facing, &config);
 
         let visible_tiles = cone_tiles
             .iter()