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/tests/game_loop.rs

@@ -66,14 +66,20 @@ fn player_moves_north_through_full_pipeline() {
         rmp_serde::from_slice(&response).expect("deserialize snapshot");
 
     // Snapshot captures state at end of tick 0 (before advance_tick increments to 1)
-    assert_eq!(snapshot.version, 6);
+    assert_eq!(snapshot.version, PROTOCOL_VERSION);
     assert_eq!(snapshot.tick, 0);
     assert_eq!(snapshot.entities.len(), 1);
 
     // v2 fields populated
     assert_eq!(snapshot.game_time.day, 0);
-    assert_eq!(snapshot.game_time.day_phase, settled_reach_server::simulation::time::DayPhase::Morning);
-    assert_eq!(snapshot.game_time.tick_rate, settled_reach_server::simulation::time::TickRate::Full);
+    assert_eq!(
+        snapshot.game_time.day_phase,
+        settled_reach_server::simulation::time::DayPhase::Morning
+    );
+    assert_eq!(
+        snapshot.game_time.tick_rate,
+        settled_reach_server::simulation::time::TickRate::Full
+    );
 
     let player_entity = &snapshot.entities[0];
     // Player started at (16, 16, 0), moved north (y-1) to (16, 15, 0)
@@ -82,7 +88,10 @@ fn player_moves_north_through_full_pipeline() {
     assert_eq!(player_entity.y, 15.5);
     assert_eq!(player_entity.z, 0);
     assert!(matches!(player_entity.kind, EntityKind::Player));
-    assert!(matches!(player_entity.visibility, VisibilitySector::Forward));
+    assert!(matches!(
+        player_entity.visibility,
+        VisibilitySector::Forward
+    ));
 
     // Clean up
     drop(reader);

server/tests/shadowcast_bench.rs

@@ -4,9 +4,9 @@
 //! Run with: cargo test --test shadowcast_bench -- --ignored --nocapture
 
 use rand::Rng;
-use rand_chacha::ChaCha8Rng;
 use rand::SeedableRng;
-use settled_reach_server::perception::shadowcast::{symmetric_shadowcast, recursive_shadowcast};
+use rand_chacha::ChaCha8Rng;
+use settled_reach_server::perception::shadowcast::{recursive_shadowcast, symmetric_shadowcast};
 use std::collections::HashSet;
 use std::time::Instant;
 
@@ -173,12 +173,14 @@ fn benchmark_symmetric_vs_recursive() {
 
         let results = bench_config(&config);
 
-        println!("  Symmetric:  {:.2}ms total, {:.2}µs/call, {:.1} tiles avg",
+        println!(
+            "  Symmetric:  {:.2}ms total, {:.2}µs/call, {:.1} tiles avg",
             results.symmetric_ms,
             results.symmetric_ms * 1000.0 / config.iterations as f64,
             results.symmetric_avg_tiles
         );
-        println!("  Recursive:  {:.2}ms total, {:.2}µs/call, {:.1} tiles avg",
+        println!(
+            "  Recursive:  {:.2}ms total, {:.2}µs/call, {:.1} tiles avg",
             results.recursive_ms,
             results.recursive_ms * 1000.0 / config.iterations as f64,
             results.recursive_avg_tiles