feat(client): resolve OQ-07 — insert-off suppresses verb labels (#522)

Option (a): cursor shape still changes (body orients to targets), but
verb labels and interaction prompts are suppressed when insert_active
is false. Amends D-056 and D-057 with resolution note.

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

client/ui/interaction_prompt.gd

@@ -13,6 +13,8 @@ extends PanelContainer
 var _is_showing: bool = false
 var _active_tween: Tween = null
 var _current_target_id: int = -1
+# OQ-07 (#522): when false, prompt is suppressed (z-layer 6 insert overlay only)
+var _insert_active: bool = true
 
 const FADE_IN: float = 0.15
 const FADE_OUT: float = 0.15
@@ -23,6 +25,11 @@ func _ready() -> void:
 	_is_showing = false
 
 func _process(_delta: float) -> void:
+	# OQ-07: insert off means no verb labels (z-layer 6 insert overlay suppressed)
+	if not _insert_active:
+		if _is_showing:
+			_hide_prompt()
+		return
 	var interactions: Array = GameState.nearby_interactions
 	if interactions.size() > 0:
 		_show_prompt(interactions[0])
@@ -69,6 +76,14 @@ func _hide_prompt() -> void:
 func get_interaction_target() -> int:
 	return _current_target_id
 
+## OQ-07 (#522): insert off hides prompt (diegetic: no insert data on z-layer 6).
+## Cursor shape changes still fire on cursor_renderer.gd.
+func set_insert_active(active: bool) -> void:
+	_insert_active = active
+	if not active and _is_showing:
+		_hide_prompt()
+
+
 ## Returns the selected verb kind (v0.1: first verb on nearest, v0.2: radial selection).
 func get_selected_verb() -> String:
 	var interactions: Array = GameState.nearby_interactions