Drop toolbar text labels in favor of hover tooltips

Varying label widths (especially when a button hides itself, e.g.
"Labs" on a question with no lab results) broke even spacing between
icons. Every toolbar button already has a tooltip_text carrying the
same label as hover text, so drop the labels/wrapper containers
entirely and go back to plain, uniformly-spaced 44x44 icon buttons.

scripts/ui/question_player.gd

@@ -280,8 +280,8 @@ func _ready() -> void:
 	timer_label.horizontal_alignment = HORIZONTAL_ALIGNMENT_RIGHT
 
 	question_toolbar = HFlowContainer.new()
-	question_toolbar.add_theme_constant_override("h_separation", 10)
+	question_toolbar.add_theme_constant_override("h_separation", 8)
-	question_toolbar.add_theme_constant_override("v_separation", 10)
+	question_toolbar.add_theme_constant_override("v_separation", 8)
 	question_toolbar.alignment = FlowContainer.ALIGNMENT_END
 
 	# All the underlying buttons are constructed up front (same as before) so every
@@ -402,19 +402,22 @@ func _ready() -> void:
 	Style.style_chip(app_feedback_button, Style.CYAN)
 	app_feedback_button.pressed.connect(func(): main.open_feedback_dialog())
 
-	# Every action is directly visible and labeled - no "More" overflow or popups
+	# Every action is directly visible - no "More" overflow or popups hiding
-	# hiding controls behind an extra click.
+	# controls behind an extra click. No text labels either (their varying widths
-	question_toolbar.add_child(_toolbar_labeled_group([text_smaller_button, text_larger_button], "Text size"))
+	# broke even spacing when a button hid itself) - each button's existing
-	question_toolbar.add_child(_toolbar_labeled_button(calculator_button, "Calculator"))
+	# tooltip_text carries the label as hover text instead.
-	question_toolbar.add_child(_toolbar_labeled_button(labs_button, "Labs"))
+	question_toolbar.add_child(text_smaller_button)
-	question_toolbar.add_child(_toolbar_labeled_button(clear_highlight_button, "Clear highlight"))
+	question_toolbar.add_child(text_larger_button)
-	question_toolbar.add_child(_toolbar_labeled_button(flag_button, "Flag"))
+	question_toolbar.add_child(calculator_button)
-	question_toolbar.add_child(_toolbar_labeled_button(flashcard_button, "Flashcard"))
+	question_toolbar.add_child(labs_button)
-	question_toolbar.add_child(_toolbar_labeled_button(bookmark_button, "Bookmark"))
+	question_toolbar.add_child(clear_highlight_button)
-	question_toolbar.add_child(_toolbar_labeled_button(report_button, "Report"))
+	question_toolbar.add_child(flag_button)
-	question_toolbar.add_child(_toolbar_labeled_button(notes_button, "Notes"))
+	question_toolbar.add_child(flashcard_button)
-	question_toolbar.add_child(_toolbar_labeled_button(theme_button, "Theme"))
+	question_toolbar.add_child(bookmark_button)
-	question_toolbar.add_child(_toolbar_labeled_button(app_feedback_button, "Feedback"))
+	question_toolbar.add_child(report_button)
+	question_toolbar.add_child(notes_button)
+	question_toolbar.add_child(theme_button)
+	question_toolbar.add_child(app_feedback_button)
 
 	header_toolbar_host = HBoxContainer.new()
 	header_toolbar_host.alignment = BoxContainer.ALIGNMENT_END
@@ -782,10 +785,7 @@ func _fit_modal_panels() -> void:
 func _refresh_responsive_layout() -> void:
 	if header_toolbar_host == null or header_row == null or header_stack == null:
 		return
-	# The toolbar now has 11 labeled groups (vs. 12 bare 44px icons before), so it
+	var compact := size.x < 1120.0
-	# needs real room to lay out on one line - give it enough minimum width to do
-	# that and raise the compact-mode threshold to match.
-	var compact := size.x < 1360.0
 	var target_parent: Control = header_row
 	if compact:
 		target_parent = header_stack
@@ -793,7 +793,7 @@ func _refresh_responsive_layout() -> void:
 		header_toolbar_host.reparent(target_parent)
 	header_toolbar_host.size_flags_horizontal = Control.SIZE_EXPAND_FILL if compact else Control.SIZE_SHRINK_END
 	question_toolbar.size_flags_horizontal = Control.SIZE_EXPAND_FILL
-	header_toolbar_host.custom_minimum_size.x = 0.0 if compact else 980.0
+	header_toolbar_host.custom_minimum_size.x = 0.0 if compact else 520.0
 	if size.x < 560.0:
 		nav_palette.columns = 5
 	else:
@@ -1012,9 +1012,6 @@ func _apply_question_theme() -> void:
 	question_panel.add_theme_stylebox_override("panel", _question_content_box(dark))
 	if navigator_popup != null:
 		navigator_popup.add_theme_stylebox_override("panel", Brand.content_card_box(dark, false))
-	if question_toolbar != null:
-		for label in question_toolbar.find_children("ToolbarLabel", "Label", true, false):
-			(label as Label).add_theme_color_override("font_color", Brand.muted_color(dark))
 	progress_button.add_theme_color_override("font_color", Brand.text_color(dark))
 	progress_button.add_theme_color_override("font_hover_color", Brand.SKY_BLUE)
 	progress_button.add_theme_color_override("font_disabled_color", Brand.text_color(dark))
@@ -2131,48 +2128,6 @@ func _toggle_question_navigator() -> void:
 	navigator_popup.popup(Rect2i(Vector2i(popup_x, popup_y), popup_size))
 
 
-func _toolbar_labeled_button(button: Button, label_text: String) -> Control:
-	var wrap := VBoxContainer.new()
-	wrap.add_theme_constant_override("separation", 2)
-	wrap.alignment = BoxContainer.ALIGNMENT_CENTER
-	wrap.size_flags_horizontal = Control.SIZE_SHRINK_CENTER
-	wrap.visible = button.visible
-	wrap.add_child(button)
-	var label := Label.new()
-	label.name = "ToolbarLabel"
-	label.text = label_text
-	label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
-	label.size_flags_horizontal = Control.SIZE_SHRINK_CENTER
-	_set_scaled_label(label, 11, Brand.SLATE)
-	wrap.add_child(label)
-	# Some buttons (labs, notes, flashcard, bookmark) toggle their own .visible at
-	# runtime depending on the question/session - without this, the icon disappears
-	# but its label stays behind, leaving an orphaned label floating in a gap.
-	button.visibility_changed.connect(func(): wrap.visible = button.visible)
-	return wrap
-
-
-func _toolbar_labeled_group(buttons: Array, label_text: String) -> Control:
-	var wrap := VBoxContainer.new()
-	wrap.add_theme_constant_override("separation", 2)
-	wrap.alignment = BoxContainer.ALIGNMENT_CENTER
-	wrap.size_flags_horizontal = Control.SIZE_SHRINK_CENTER
-	var row := HBoxContainer.new()
-	row.add_theme_constant_override("separation", 4)
-	row.alignment = BoxContainer.ALIGNMENT_CENTER
-	for button in buttons:
-		row.add_child(button)
-	wrap.add_child(row)
-	var label := Label.new()
-	label.name = "ToolbarLabel"
-	label.text = label_text
-	label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
-	label.size_flags_horizontal = Control.SIZE_SHRINK_CENTER
-	_set_scaled_label(label, 11, Brand.SLATE)
-	wrap.add_child(label)
-	return wrap
-
-
 func _navigate_to_question(target_index: int) -> void:
 	if target_index == BlockSessionService.current_index:
 		navigator_popup.hide()