feat(simulation): ban HashMap via clippy disallowed_types, fix violations (#343)

Adds server/.clippy.toml with disallowed-types for std::collections::HashMap
and std::collections::HashSet. HashMap iteration order is non-deterministic
and breaks deterministic simulation replay (D-030).

Changes:
- server/.clippy.toml: disallow HashMap and HashSet crate-wide
- simulation/movement.rs: WalkabilityMap.chunks and occupied map → BTreeMap;
  add PartialOrd+Ord to ChunkCoord, TilePosition, TilePresence
- simulation/monologue.rs: MonologueState.shown_ids → BTreeSet (simulation state)
- perception/shadowcast.rs: #![allow] — per-frame FOV scratch, iteration irrelevant
- perception/interpretation.rs: #![allow] — per-frame lookup table, key-only access
- perception/query.rs: #![allow] — sector_lookup is a per-frame read-only cache

Also applies cargo fmt to pre-existing format drift in contraband.rs,
dialogue.rs, test_world/mod.rs, and several integration tests.

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

server/tests/content_scaling.rs

@@ -21,7 +21,9 @@ use std::time::Instant;
 use settled_reach_server::bridge::types::*;
 use settled_reach_server::bridge::BridgePlugin;
 use settled_reach_server::knowledge::registry::{EntityRegistry, StableEntityId};
-use settled_reach_server::knowledge::{KnowledgeConfidence, KnowledgeGraph, KnowledgePlugin, StableId};
+use settled_reach_server::knowledge::{
+    KnowledgeConfidence, KnowledgeGraph, KnowledgePlugin, StableId,
+};
 use settled_reach_server::npc::{Contentment, Npc, NpcPlugin, ToleranceThreshold, Want, WantKind};
 use settled_reach_server::simulation::interaction::Interactable;
 use settled_reach_server::simulation::movement::TilePosition;
@@ -462,10 +464,8 @@ fn max_npc_pack_behavioral_regression() {
         .clone();
     let stress_kg = player_kg_snapshot(&stress_app, max_gauntlet_id);
 
-    let baseline_snap = baseline_snapshot
-        .expect("baseline Gauntlet should produce a snapshot");
-    let stress_snap = stress_snapshot
-        .expect("80-NPC stress run should produce a snapshot");
+    let baseline_snap = baseline_snapshot.expect("baseline Gauntlet should produce a snapshot");
+    let stress_snap = stress_snapshot.expect("80-NPC stress run should produce a snapshot");
 
     // Tick index must match (same number of updates).
     assert_eq!(

server/tests/cross_room_transitions.rs

@@ -349,10 +349,7 @@ fn t4_knowledge_graph_survives_room_transition() {
         "T4 post: KG entry must persist after player moves to Hub"
     );
     assert_eq!(
-        world
-            .get::<KnowledgeGraph>(player)
-            .unwrap()
-            .entity_count(),
+        world.get::<KnowledgeGraph>(player).unwrap().entity_count(),
         1,
         "T4 post: exactly 1 KG entry after room transition"
     );
@@ -542,7 +539,10 @@ fn t7_confrontation_verb_disappears_on_retreat_beyond_mid_range() {
         "T7 close: NPC at distance 2 must appear in interaction buffer"
     );
     assert!(
-        interactions[0].verbs.iter().any(|v| v.kind == VerbKind::Talk),
+        interactions[0]
+            .verbs
+            .iter()
+            .any(|v| v.kind == VerbKind::Talk),
         "T7 close: Talk must be available at CLOSE_RANGE (confrontation possible)"
     );
 
@@ -599,7 +599,10 @@ fn t8_sprint_blocks_eavesdrop_then_careful_enables_accumulation() {
         run_listening_system(&mut world);
     }
     assert_eq!(
-        world.get::<ListeningFocus>(player).unwrap().stationary_ticks,
+        world
+            .get::<ListeningFocus>(player)
+            .unwrap()
+            .stationary_ticks,
         0,
         "T8 sprint: Sprint must block stationary_ticks (50 ticks at sprint, still 0)"
     );
@@ -613,7 +616,10 @@ fn t8_sprint_blocks_eavesdrop_then_careful_enables_accumulation() {
     // resets stationary_ticks to 0, and updates last_position to alcove_pos.
     run_listening_system(&mut world);
     assert_eq!(
-        world.get::<ListeningFocus>(player).unwrap().stationary_ticks,
+        world
+            .get::<ListeningFocus>(player)
+            .unwrap()
+            .stationary_ticks,
         0,
         "T8 transition: movement tick must reset stationary_ticks to 0"
     );