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/knowledge/graph.rs

@@ -108,22 +108,20 @@ impl KnowledgeGraph {
     // --- Write Operations ---
 
     /// Record a direct observation of another entity (entity is in LOS).
-    pub fn observe_entity(
-        &mut self,
-        target: StableId,
-        position: TilePosition,
-        tick: u64,
-    ) {
-        let entry = self.entities.entry(target).or_insert_with(|| EntityKnowledge {
-            last_known_position: None,
-            last_observed_tick: 0,
-            last_updated_tick: 0,
-            confidence: KnowledgeConfidence::Direct,
-            source: KnowledgeSource::DirectObservation { tick },
-            state: KnowledgeState::Active,
-            relationship: RelationshipState::Unknown,
-            known_attributes: BTreeMap::new(),
-        });
+    pub fn observe_entity(&mut self, target: StableId, position: TilePosition, tick: u64) {
+        let entry = self
+            .entities
+            .entry(target)
+            .or_insert_with(|| EntityKnowledge {
+                last_known_position: None,
+                last_observed_tick: 0,
+                last_updated_tick: 0,
+                confidence: KnowledgeConfidence::Direct,
+                source: KnowledgeSource::DirectObservation { tick },
+                state: KnowledgeState::Active,
+                relationship: RelationshipState::Unknown,
+                known_attributes: BTreeMap::new(),
+            });
         entry.last_known_position = Some(position);
         entry.last_observed_tick = tick;
         entry.last_updated_tick = tick;
@@ -251,10 +249,7 @@ mod tests {
         g.observe_entity(target, make_position(5, 10), 100);
         g.set_relationship(&target, RelationshipState::Hostile);
 
-        assert_eq!(
-            g.relationship_with(&target),
-            RelationshipState::Hostile
-        );
+        assert_eq!(g.relationship_with(&target), RelationshipState::Hostile);
     }
 
     #[test]
@@ -330,10 +325,7 @@ mod tests {
         };
         // Age = 200 - 100 = 100, which is > decay_after (10)
         g.decay(200, &thresholds);
-        assert_eq!(
-            g.confidence_of(&target),
-            Some(KnowledgeConfidence::KnowsOf)
-        );
+        assert_eq!(g.confidence_of(&target), Some(KnowledgeConfidence::KnowsOf));
     }
 
     #[test]

server/src/knowledge/mod.rs

@@ -12,9 +12,7 @@ pub mod graph;
 pub mod registry;
 pub mod types;
 
-pub use events::{
-    KnowledgeEvent, KnowledgeEventQueue, KnowledgeEventType,
-};
+pub use events::{KnowledgeEvent, KnowledgeEventQueue, KnowledgeEventType};
 pub use graph::KnowledgeGraph;
 pub use registry::{EntityRegistry, StableEntityId};
 pub use types::*;
@@ -33,8 +31,7 @@ impl Plugin for KnowledgePlugin {
                 (
                     events::process_knowledge_events
                         .after(crate::perception::observer::compute_observer_snapshot),
-                    events::decay_knowledge
-                        .after(events::process_knowledge_events),
+                    events::decay_knowledge.after(events::process_knowledge_events),
                 ),
             );
         tracing::debug!("KnowledgePlugin initialized");