fix(client): address PR #36 re-review — 7 items from Hoshe + Tyre

Warnings: facing indicator tests use Godot-normalized rotation range
(-PI, PI] instead of raw addition (SW/W/NW in test_rendering,
West in test_client_p3). Suggestions: cache font in world_radial
_draw(), fix docstring on deactivate_insert() trigger, document
tile-coordinate system on _eval_player_near (D-066), add public
reset_facing_state() to InputMapper (D-030 testability).

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

client/scripts/checklist/checklist_evaluator.gd

@@ -160,6 +160,9 @@ func _evaluate_condition(cond: Dictionary) -> bool:
 	return false
 
 
+## x/y and radius are in tile coordinates (matching GameState.player_position),
+## not pixels. D-066 dual-scale: YAML authors write tile coords, pixel conversion
+## happens only at render time.
 func _eval_player_near(cond: Dictionary) -> bool:
 	var tx: float = float(cond.get("x", 0))
 	var ty: float = float(cond.get("y", 0))