fix(client): address PR review — input bug, bounds checks, fixture tests

- Fix input_mapper double-check bug (redundant InputEventKey + pressed filter)
- Add bounds checking for position arrays in entity_renderer and game_state
- Make test snapshot deterministic (incrementing counter, not wall clock)
- Fix tween overlap in monologue_display (cancel active tween before new one)
- Extract TILE_SIZE constant from magic number 32
- Add 5 D-030 Layer 1 fixture tests for snapshot parsing (7/7 total passing)

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

client/scripts/autoloads/input_mapper.gd

@@ -9,40 +9,26 @@ enum Action {
 var input_queue: Array[Dictionary] = []
 
 func _unhandled_input(event: InputEvent) -> void:
-	# Only process key press events (not releases or repeats)
-	if not event is InputEventKey:
-		return
-	if not event.pressed or event.echo:
-		return
-
 	var action: Action = -1
-	var action_name: String = ""
 
 	# Map input actions to semantic Action enum
+	# is_action_pressed handles press detection for all input types (key, gamepad, etc.)
 	if event.is_action_pressed("move_north"):
 		action = Action.MOVE_NORTH
-		action_name = "move_north"
 	elif event.is_action_pressed("move_south"):
 		action = Action.MOVE_SOUTH
-		action_name = "move_south"
 	elif event.is_action_pressed("move_east"):
 		action = Action.MOVE_EAST
-		action_name = "move_east"
 	elif event.is_action_pressed("move_west"):
 		action = Action.MOVE_WEST
-		action_name = "move_west"
 	elif event.is_action_pressed("interact"):
 		action = Action.INTERACT
-		action_name = "interact"
 	elif event.is_action_pressed("perception_mode"):
 		action = Action.USE_PERCEPTION_MODE
-		action_name = "perception_mode"
 	elif event.is_action_pressed("open_menu"):
 		action = Action.OPEN_MENU
-		action_name = "open_menu"
 	elif event.is_action_pressed("pause"):
 		action = Action.PAUSE
-		action_name = "pause"
 
 	# Queue the action if valid
 	if action != -1: