fix(simulation): Clippy cleanup and CI enforcement (#635)

Fix all Clippy warnings across the server codebase (2411 insertions, 1341
deletions). Raise type-complexity-threshold to 750 and too-many-arguments
to 12 in .clippy.toml for idiomatic Bevy ECS system signatures. The server
now passes `cargo clippy -- --deny warnings` cleanly.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/src/npc/routine.rs

@@ -132,12 +132,7 @@ pub fn enter_activity(
     mut commands: Commands,
     time: Res<SimulationTime>,
     npcs: Query<
-        (
-            Entity,
-            &TilePosition,
-            &DailyRoutine,
-            Option<&ActivityState>,
-        ),
+        (Entity, &TilePosition, &DailyRoutine, Option<&ActivityState>),
         (
             With<Npc>,
             With<ActiveSim>,
@@ -287,8 +282,7 @@ pub fn detect_routine_deviation(
     let phase = time.day_phase();
     let tick = time.tick;
 
-    for (entity, pos, routine, activity_opt, path_req, computed_path, deviating_opt) in
-        npcs.iter()
+    for (entity, pos, routine, activity_opt, path_req, computed_path, deviating_opt) in npcs.iter()
     {
         let Some(entry) = routine.entry_for_phase(phase) else {
             // No routine entry for this phase — nothing to deviate from.
@@ -388,7 +382,7 @@ mod tests {
             .spawn((
                 Npc,
                 crate::simulation::tier::ActiveSim, // system requires With<ActiveSim> (#94)
-                TilePosition::new(5, 5, 0), // Not at afternoon location
+                TilePosition::new(5, 5, 0),         // Not at afternoon location
                 DailyRoutine {
                     entries: vec![RoutineEntry {
                         phase: DayPhase::Afternoon,
@@ -570,7 +564,10 @@ mod tests {
         let state = world.get::<ActivityState>(entity).unwrap();
         assert_eq!(state.activity, "Work");
         assert_eq!(state.phase, DayPhase::Afternoon);
-        assert_eq!(state.started_tick, MINUTES_PER_PHASE * TICKS_PER_GAME_MINUTE);
+        assert_eq!(
+            state.started_tick,
+            MINUTES_PER_PHASE * TICKS_PER_GAME_MINUTE
+        );
     }
 
     #[test]
@@ -933,7 +930,10 @@ mod tests {
         run_deviation_system(&mut world);
 
         let queue = world.resource::<RoutineDeviationEventQueue>();
-        assert!(queue.is_empty(), "on-schedule NPC should not emit a deviation event");
+        assert!(
+            queue.is_empty(),
+            "on-schedule NPC should not emit a deviation event"
+        );
     }
 
     #[test]