fix(client): address PR #62 review suggestions — polish pass

- interaction_list.gd: skip queue_redraw() when position unchanged (Tyre #4)
- time_display.tscn: widen bounding rect 154x44→184x54, add clip note
  for #314 wireframe (Tyre #3)
- test_time_display_sprint17.gd: document private state access pattern
  in header (Tyre #5), add upper bound assertion for D-031 1439 max (Hoshe #6)

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

client/ui/interaction_list.gd

@@ -41,10 +41,14 @@ func _ready() -> void:
 	mouse_filter = Control.MOUSE_FILTER_IGNORE
 
 
+var _last_screen_pos: Vector2 = Vector2.ZERO
+
 func _process(_delta: float) -> void:
 	if _showing:
 		_update_screen_position()
-		queue_redraw()
+		if position != _last_screen_pos:
+			_last_screen_pos = position
+			queue_redraw()
 
 
 func _draw() -> void:

client/ui/time_display.tscn

@@ -3,7 +3,9 @@
 [ext_resource type="Script" path="res://ui/time_display.gd" id="1_tdisplay"]
 
 ; #263: Time display — top-left placeholder per D-013/D-051.
-; Position will be updated when #314 wireframe lands.
+; Position and size will be refined when #314 wireframe lands.
+; NOTE: draw-based content manages its own layout; Control rect is a
+; minimum bounding box, not a clip rect. Increase if content grows.
 [node name="TimeDisplay" type="Control"]
 anchors_preset = 0
 anchor_left = 0.0
@@ -12,8 +14,8 @@ anchor_right = 0.0
 anchor_bottom = 0.0
 offset_left = 16.0
 offset_top = 16.0
-offset_right = 170.0
-offset_bottom = 60.0
+offset_right = 200.0
+offset_bottom = 70.0
 grow_horizontal = 2
 grow_vertical = 2
 mouse_filter = 2