refactor(simulation): split the input.rs and dialogue.rs dispatchers (T-1062)

input.rs 2,739 → 858 lines: per-domain action handlers moved to their
owning modules (inventory, movement, stance, examine, follow, interaction,
save_io, settings, bridge::debug, economy, vision_cone, bookmark,
test_world reset + new teleport.rs); input.rs keeps the queue, the thin
dispatch table, and pause/cooldown glue. All 9 type_complexity allows
dissolved via one PlayerInputQuery alias.

dialogue.rs → dialogue/ directory module: selection (631), response
(1,473), confrontation (714), mod.rs (226, shared session components +
re-exports — public paths preserved). Documented seam deviation:
process_walk_away lives with confrontation (D-064/D-063 share the same
world-response shape).

Mechanical, zero behavior change: determinism + golden_suite byte-identical
(independently re-verified); 1,504 lib tests unchanged — 23 input tests
moved with their subjects, 53 dialogue tests redistributed, zero deleted.
System scheduling registrations untouched (input_plugin.rs 0-line diff).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

server/src/test_world/reset.rs

@@ -115,6 +115,67 @@ impl RoomSnapshots {
     }
 }
 
+/// Handle Reset verb: restore a room's entities to their initial positions.
+/// Target entity must have a RoomResetTrigger component. Respects debounce.
+pub fn handle_reset(
+    commands: &mut Commands,
+    registry: &crate::knowledge::EntityRegistry,
+    reset_triggers: &Query<&RoomResetTrigger>,
+    room_snapshots: &mut Option<ResMut<RoomSnapshots>>,
+    target_entity_id: Option<u64>,
+    current_tick: u64,
+) {
+    let Some(target_id) = target_entity_id else {
+        tracing::warn!("Reset verb without target_entity_id");
+        return;
+    };
+
+    let Some(snapshots) = room_snapshots.as_mut() else {
+        tracing::warn!("Reset verb but RoomSnapshots resource not available");
+        return;
+    };
+
+    let target_stable = crate::knowledge::StableId(target_id);
+    let Some(target_entity) = registry.to_entity(&target_stable) else {
+        tracing::warn!(target_id, "Reset: target entity not in registry");
+        return;
+    };
+
+    let Ok(trigger) = reset_triggers.get(target_entity) else {
+        tracing::warn!(target_id, "Reset: target is not a reset trigger");
+        return;
+    };
+
+    let Some(changes) = snapshots.plan_reset(&trigger.room_name, current_tick) else {
+        tracing::info!(
+            room = trigger.room_name.as_str(),
+            "Reset: debounced or unknown room"
+        );
+        return;
+    };
+
+    let mut restored = 0;
+    for (entity, position, is_floor_item) in changes {
+        if is_floor_item {
+            commands
+                .entity(entity)
+                .remove::<crate::simulation::inventory::CarriedBy>()
+                .remove::<crate::simulation::inventory::InventorySlot>()
+                .insert(position);
+        } else {
+            commands.entity(entity).insert(position);
+        }
+        restored += 1;
+    }
+
+    tracing::info!(
+        room = trigger.room_name.as_str(),
+        restored,
+        current_tick,
+        "Room reset executed via Reset verb"
+    );
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -208,4 +269,221 @@ mod tests {
         assert!(snapshots.can_reset("room", 110));
         assert!(snapshots.can_reset("room", 200));
     }
+
+    // -----------------------------------------------------------------------
+    // Reset verb tests (#490; moved from input.rs, T-1062)
+    // -----------------------------------------------------------------------
+
+    use crate::bridge::types::{PlayerAction, PlayerInput};
+    use crate::knowledge::EntityRegistry;
+    use crate::simulation::input::{process_player_input, InputQueue};
+    use crate::simulation::inventory::{CarriedBy, InventorySlot, ItemName};
+    use crate::simulation::movement::PlayerCharacter;
+    use crate::simulation::time::SimulationTime;
+
+    #[test]
+    fn reset_verb_restores_floor_item() {
+        // #490: Take a floor item, then Reset verb restores it to original position.
+        let mut world = bevy_ecs::world::World::new();
+        world.insert_resource(InputQueue::default());
+        world.insert_resource(SimulationTime::default());
+        world.init_resource::<EntityRegistry>();
+
+        // Player
+        let player = world
+            .spawn((PlayerCharacter, TilePosition::new(5, 5, 0)))
+            .id();
+        let player_sid = world.resource_mut::<EntityRegistry>().register(player);
+
+        // Floor item at (5, 4)
+        let item = world
+            .spawn((TilePosition::new(5, 4, 0), ItemName("Keycard".into())))
+            .id();
+        let item_sid = world.resource_mut::<EntityRegistry>().register(item);
+
+        // Reset plate entity
+        let plate = world
+            .spawn((
+                crate::simulation::interaction::Interactable,
+                RoomResetTrigger {
+                    room_name: "test_room".to_string(),
+                },
+                TilePosition::new(5, 3, 0),
+            ))
+            .id();
+        let plate_sid = world.resource_mut::<EntityRegistry>().register(plate);
+
+        // Record snapshot: item is a floor item at its original position
+        let mut snapshots = RoomSnapshots::default();
+        snapshots.record("test_room", item, TilePosition::new(5, 4, 0), true);
+        world.insert_resource(snapshots);
+
+        let mut schedule = bevy_ecs::schedule::Schedule::default();
+        schedule.add_systems(process_player_input);
+
+        // Step 1: Take the item
+        world.resource_mut::<InputQueue>().push(PlayerInput {
+            tick: 0,
+            action: PlayerAction::Interact {
+                target_entity_id: Some(item_sid.0),
+                verb: Some("Take".into()),
+            },
+        });
+        schedule.run(&mut world);
+
+        assert!(
+            world.get::<TilePosition>(item).is_none(),
+            "Item should be picked up"
+        );
+        assert_eq!(world.get::<CarriedBy>(item).unwrap().0, player_sid);
+
+        // Step 2: Reset via verb
+        world.resource_mut::<InputQueue>().push(PlayerInput {
+            tick: 1,
+            action: PlayerAction::Interact {
+                target_entity_id: Some(plate_sid.0),
+                verb: Some("Reset".into()),
+            },
+        });
+        world.resource_mut::<SimulationTime>().tick = 1;
+        schedule.run(&mut world);
+
+        // Item should be back on the ground at original position
+        let pos = world
+            .get::<TilePosition>(item)
+            .expect("Item should be restored to ground");
+        assert_eq!(
+            *pos,
+            TilePosition::new(5, 4, 0),
+            "Item at original position"
+        );
+        assert!(
+            world.get::<CarriedBy>(item).is_none(),
+            "CarriedBy removed after reset"
+        );
+        assert!(
+            world.get::<InventorySlot>(item).is_none(),
+            "InventorySlot removed after reset"
+        );
+    }
+
+    #[test]
+    fn reset_verb_debounces() {
+        // #490: Reset debounce prevents rapid-fire resets.
+        let mut world = bevy_ecs::world::World::new();
+        world.insert_resource(InputQueue::default());
+        world.insert_resource(SimulationTime::default());
+        world.init_resource::<EntityRegistry>();
+
+        let _player = world
+            .spawn((PlayerCharacter, TilePosition::new(5, 5, 0)))
+            .id();
+
+        // NPC entity
+        let npc = world.spawn(TilePosition::new(10, 10, 0)).id();
+        world.resource_mut::<EntityRegistry>().register(npc);
+
+        // Reset plate
+        let plate = world
+            .spawn((
+                crate::simulation::interaction::Interactable,
+                RoomResetTrigger {
+                    room_name: "test_room".to_string(),
+                },
+                TilePosition::new(5, 3, 0),
+            ))
+            .id();
+        let plate_sid = world.resource_mut::<EntityRegistry>().register(plate);
+
+        let mut snapshots = RoomSnapshots::default();
+        snapshots.record("test_room", npc, TilePosition::new(10, 10, 0), false);
+        world.insert_resource(snapshots);
+
+        let mut schedule = bevy_ecs::schedule::Schedule::default();
+        schedule.add_systems(process_player_input);
+
+        // First reset at tick 0 — should succeed
+        world.resource_mut::<InputQueue>().push(PlayerInput {
+            tick: 0,
+            action: PlayerAction::Interact {
+                target_entity_id: Some(plate_sid.0),
+                verb: Some("Reset".into()),
+            },
+        });
+        schedule.run(&mut world);
+
+        // Move NPC to verify debounce blocks second reset
+        *world.get_mut::<TilePosition>(npc).unwrap() = TilePosition::new(20, 20, 0);
+
+        // Second reset at tick 5 — should be debounced (< 10 ticks)
+        world.resource_mut::<InputQueue>().push(PlayerInput {
+            tick: 5,
+            action: PlayerAction::Interact {
+                target_entity_id: Some(plate_sid.0),
+                verb: Some("Reset".into()),
+            },
+        });
+        world.resource_mut::<SimulationTime>().tick = 5;
+        schedule.run(&mut world);
+
+        // NPC should still be at moved position (reset was debounced)
+        assert_eq!(
+            world.get::<TilePosition>(npc).unwrap().x,
+            20,
+            "NPC not reset — debounced"
+        );
+
+        // Third reset at tick 10 — should succeed
+        world.resource_mut::<InputQueue>().push(PlayerInput {
+            tick: 10,
+            action: PlayerAction::Interact {
+                target_entity_id: Some(plate_sid.0),
+                verb: Some("Reset".into()),
+            },
+        });
+        world.resource_mut::<SimulationTime>().tick = 10;
+        schedule.run(&mut world);
+
+        // NPC should be back at original position
+        assert_eq!(
+            world.get::<TilePosition>(npc).unwrap().x,
+            10,
+            "NPC reset after debounce elapsed"
+        );
+    }
+
+    #[test]
+    fn reset_verb_without_snapshots_is_noop() {
+        // Reset verb when no RoomSnapshots resource exists should not panic.
+        let mut world = bevy_ecs::world::World::new();
+        world.insert_resource(InputQueue::default());
+        world.insert_resource(SimulationTime::default());
+        world.init_resource::<EntityRegistry>();
+
+        world.spawn((PlayerCharacter, TilePosition::new(5, 5, 0)));
+
+        let plate = world
+            .spawn((
+                crate::simulation::interaction::Interactable,
+                RoomResetTrigger {
+                    room_name: "test_room".to_string(),
+                },
+                TilePosition::new(5, 3, 0),
+            ))
+            .id();
+        let plate_sid = world.resource_mut::<EntityRegistry>().register(plate);
+
+        // No RoomSnapshots resource inserted — should be gracefully handled
+        world.resource_mut::<InputQueue>().push(PlayerInput {
+            tick: 0,
+            action: PlayerAction::Interact {
+                target_entity_id: Some(plate_sid.0),
+                verb: Some("Reset".into()),
+            },
+        });
+
+        let mut schedule = bevy_ecs::schedule::Schedule::default();
+        schedule.add_systems(process_player_input);
+        schedule.run(&mut world); // should not panic
+    }
 }