Show the actual time remaining during exam simulations

timer_label and timer_caption_label were fully driven (text, color,
visibility) but never parented into the scene tree, so only the bare
progress bar rendered - no MM:SS readout or "Time remaining"/"Time
elapsed" caption in any session mode. Parent them into timer_footer
alongside the existing bar.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

scripts/ui/question_player.gd

@@ -701,10 +701,6 @@ func _ready() -> void:
 	bottom_progress_bar.size_flags_horizontal = Control.SIZE_SHRINK_CENTER
 	bottom_progress_group.add_child(bottom_progress_bar)
 
-	# The timer readout still runs (BlockSessionService pacing/scoring depends on
-	# it, and _update_timer_bar keeps its text current), it's just no longer
-	# parented into the bottom bar - the caption + digits and the "Ctrl+Enter"
-	# hint were clutter next to the Submit button.
 	timer_caption_label = Label.new()
 	timer_caption_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_RIGHT
 	_set_scaled_label(timer_caption_label, 12, Brand.SLATE)
@@ -720,6 +716,8 @@ func _ready() -> void:
 	timer_footer = HBoxContainer.new()
 	timer_footer.add_theme_constant_override("separation", 12)
 	card_content.add_child(timer_footer)
+	timer_footer.add_child(timer_caption_label)
+	timer_footer.add_child(timer_label)
 	timer_bar = ProgressBar.new()
 	timer_bar.show_percentage = false
 	timer_bar.min_value = 0.0