feat(engine): add Menu dropdown for Stats/Achievements/Profile/Settings/Leaderboard

Continues the UI-first pass. The five informational overlays were
each behind a single-key shortcut (S/A/P/O/L) with no visible UI
affordance. Add a "Menu ▾" button to the action bar that toggles a
popover with one row per overlay. Each row dispatches the same code
path the keyboard accelerator uses by writing a new
`Toggle*RequestEvent`:

- Stats        → ToggleStatsRequestEvent
- Achievements → ToggleAchievementsRequestEvent
- Profile      → ToggleProfileRequestEvent
- Settings     → ToggleSettingsRequestEvent
- Leaderboard  → ToggleLeaderboardRequestEvent

Each plugin's existing toggle handler now reads either its key or
the matching request event so the spawn / despawn / fetch logic stays
in the owning plugin (the popover never duplicates that behaviour).

Action bar order is now (left → right):
  Menu ▾   Undo   Pause   Help   Modes ▾   New Game

Menu sits on the far left because it's a navigation aggregator;
New Game stays on the far right as the most consequential action.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

ARCHITECTURE.md

@@ -251,7 +251,7 @@ The "Shortcut" column lists optional keyboard accelerators. Every action in this
 | `CursorPlugin` | — | Custom cursor sprite during drag |
 | `SelectionPlugin` | — | Keyboard-driven card selection |
 | `GamePlugin` | N | Core game state resource, new-game flow, win/game-over overlays |
-| `HudPlugin` | — | Score, move counter, timer, auto-complete badge |
+| `HudPlugin` | — | Score, move counter, timer, auto-complete badge, and the top-right action button bar (Undo / Pause / Help / New Game). Each button fires the same request event the corresponding hotkey does. |
 | `StatsPlugin` | S | Stats overlay and persistence |
 | `ProgressPlugin` | — | XP/level system, persistence |
 | `AchievementPlugin` | A | Unlock evaluation, toast events, persistence |

solitaire_engine/src/achievement_plugin.rs

@@ -17,7 +17,9 @@ use solitaire_data::{
     save_progress_to,
 };
 
-use crate::events::{AchievementUnlockedEvent, GameWonEvent, XpAwardedEvent};
+use crate::events::{
+    AchievementUnlockedEvent, GameWonEvent, ToggleAchievementsRequestEvent, XpAwardedEvent,
+};
 use crate::game_plugin::GameMutation;
 use crate::progress_plugin::{LevelUpEvent, ProgressResource, ProgressStoragePath, ProgressUpdate};
 use crate::resources::GameStateResource;
@@ -73,6 +75,7 @@ impl Plugin for AchievementPlugin {
             .add_message::<AchievementUnlockedEvent>()
             .add_message::<GameWonEvent>()
             .add_message::<XpAwardedEvent>()
+            .add_message::<ToggleAchievementsRequestEvent>()
             // Run after GameMutation (so GameWonEvent is available), after
             // StatsUpdate (so stats reflect this win), and after ProgressUpdate
             // (so daily_challenge_streak is up to date for daily_devotee).
@@ -197,14 +200,17 @@ pub fn display_name_for(id: &str) -> String {
         .unwrap_or_else(|| id.to_string())
 }
 
-/// Toggle the achievements overlay with the `A` key.
+/// Toggle the achievements overlay — `A` keyboard accelerator or
+/// `ToggleAchievementsRequestEvent` from the HUD Menu popover.
 fn toggle_achievements_screen(
     mut commands: Commands,
     keys: Res<ButtonInput<KeyCode>>,
+    mut requests: MessageReader<ToggleAchievementsRequestEvent>,
     achievements: Res<AchievementsResource>,
     screens: Query<Entity, With<AchievementsScreen>>,
 ) {
-    if !keys.just_pressed(KeyCode::KeyA) {
+    let button_clicked = requests.read().count() > 0;
+    if !keys.just_pressed(KeyCode::KeyA) && !button_clicked {
         return;
     }
     if let Ok(entity) = screens.single() {

solitaire_engine/src/challenge_plugin.rs

@@ -8,7 +8,9 @@ use bevy::prelude::*;
 use solitaire_core::game_state::GameMode;
 use solitaire_data::{challenge_count, challenge_seed_for, save_progress_to};
 
-use crate::events::{GameWonEvent, InfoToastEvent, NewGameRequestEvent};
+use crate::events::{
+    GameWonEvent, InfoToastEvent, NewGameRequestEvent, StartChallengeRequestEvent,
+};
 use crate::game_plugin::GameMutation;
 use crate::progress_plugin::{ProgressResource, ProgressStoragePath, ProgressUpdate};
 use crate::resources::GameStateResource;
@@ -33,6 +35,7 @@ impl Plugin for ChallengePlugin {
         app.add_message::<ChallengeAdvancedEvent>()
             .add_message::<GameWonEvent>()
             .add_message::<NewGameRequestEvent>()
+            .add_message::<StartChallengeRequestEvent>()
             .add_message::<InfoToastEvent>()
             // Run after ProgressUpdate so we don't fight ProgressPlugin's add_xp.
             .add_systems(Update, advance_on_challenge_win.after(ProgressUpdate))
@@ -70,11 +73,14 @@ fn advance_on_challenge_win(
 
 fn handle_start_challenge_request(
     keys: Res<ButtonInput<KeyCode>>,
+    mut requests: MessageReader<StartChallengeRequestEvent>,
     progress: Res<ProgressResource>,
     mut new_game: MessageWriter<NewGameRequestEvent>,
     mut info_toast: MessageWriter<InfoToastEvent>,
 ) {
-    if !keys.just_pressed(KeyCode::KeyX) {
+    // Either X or the HUD Modes-popover "Challenge" row triggers this.
+    let button_clicked = requests.read().count() > 0;
+    if !keys.just_pressed(KeyCode::KeyX) && !button_clicked {
         return;
     }
     if progress.0.level < CHALLENGE_UNLOCK_LEVEL {

solitaire_engine/src/daily_challenge_plugin.rs

@@ -18,7 +18,10 @@ use chrono::{Local, NaiveDate};
 use solitaire_data::{daily_seed_for, save_progress_to};
 use solitaire_sync::ChallengeGoal;
 
-use crate::events::{GameWonEvent, InfoToastEvent, NewGameRequestEvent, XpAwardedEvent};
+use crate::events::{
+    GameWonEvent, InfoToastEvent, NewGameRequestEvent, StartDailyChallengeRequestEvent,
+    XpAwardedEvent,
+};
 use crate::game_plugin::GameMutation;
 use crate::progress_plugin::{ProgressResource, ProgressStoragePath, ProgressUpdate};
 use crate::resources::GameStateResource;
@@ -83,6 +86,7 @@ impl Plugin for DailyChallengePlugin {
             .add_message::<DailyGoalAnnouncementEvent>()
             .add_message::<GameWonEvent>()
             .add_message::<NewGameRequestEvent>()
+            .add_message::<StartDailyChallengeRequestEvent>()
             .add_message::<XpAwardedEvent>()
             .add_systems(Startup, fetch_server_challenge)
             .add_systems(Update, poll_server_challenge)
@@ -189,11 +193,16 @@ fn handle_daily_completion(
 
 fn handle_start_daily_request(
     keys: Res<ButtonInput<KeyCode>>,
+    mut requests: MessageReader<StartDailyChallengeRequestEvent>,
     daily: Res<DailyChallengeResource>,
     mut new_game: MessageWriter<NewGameRequestEvent>,
     mut announce: MessageWriter<DailyGoalAnnouncementEvent>,
 ) {
-    if keys.just_pressed(KeyCode::KeyC) {
+    // Either C or the HUD Modes-popover "Daily Challenge" row triggers this.
+    let button_clicked = requests.read().count() > 0;
+    if !keys.just_pressed(KeyCode::KeyC) && !button_clicked {
+        return;
+    }
     new_game.write(NewGameRequestEvent {
         seed: Some(daily.seed),
         mode: None,
@@ -204,7 +213,6 @@ fn handle_start_daily_request(
         .clone()
         .unwrap_or_else(|| "Daily Challenge".to_string());
     announce.write(DailyGoalAnnouncementEvent(desc));
-    }
 }
 
 #[cfg(test)]

solitaire_engine/src/events.rs

@@ -86,6 +86,74 @@ pub struct AchievementUnlockedEvent(pub AchievementRecord);
 #[derive(Message, Debug, Clone, Copy, Default)]
 pub struct ManualSyncRequestEvent;
 
+/// Request to toggle the pause overlay. Fired by the HUD "Pause" button so
+/// the same toggle path runs whether the player presses `Esc` or clicks.
+/// Consumed by `pause_plugin::toggle_pause`, which honours the same drag /
+/// game-over / selection guards either way.
+#[derive(Message, Debug, Clone, Copy, Default)]
+pub struct PauseRequestEvent;
+
+/// Request to toggle the help / controls overlay. Fired by the HUD "Help"
+/// button alongside the existing `F1` accelerator so the overlay is
+/// reachable without a keyboard. Consumed by `help_plugin::toggle_help_screen`.
+#[derive(Message, Debug, Clone, Copy, Default)]
+pub struct HelpRequestEvent;
+
+/// Request to start a Zen-mode game. Fired by the HUD Modes-popover "Zen"
+/// row alongside the existing `Z` accelerator. The handler in
+/// `input_plugin` enforces the level gate (Zen unlocks at level 5) and
+/// shows an informational toast when locked.
+#[derive(Message, Debug, Clone, Copy, Default)]
+pub struct StartZenRequestEvent;
+
+/// Request to start the next Challenge-mode game. Fired by the HUD
+/// Modes-popover "Challenge" row alongside the existing `X` accelerator.
+/// The handler in `challenge_plugin` enforces the level gate, picks the
+/// next seed from `progress.challenge_index`, and writes the
+/// corresponding `NewGameRequestEvent`.
+#[derive(Message, Debug, Clone, Copy, Default)]
+pub struct StartChallengeRequestEvent;
+
+/// Request to start a Time Attack session. Fired by the HUD
+/// Modes-popover "Time Attack" row alongside the existing `T`
+/// accelerator. The handler in `time_attack_plugin` enforces the level
+/// gate, initialises `TimeAttackResource`, and writes the corresponding
+/// `NewGameRequestEvent`.
+#[derive(Message, Debug, Clone, Copy, Default)]
+pub struct StartTimeAttackRequestEvent;
+
+/// Request to start today's Daily Challenge. Fired by the HUD
+/// Modes-popover "Daily Challenge" row alongside the existing `C`
+/// accelerator. The handler in `daily_challenge_plugin` reads
+/// `DailyChallengeResource::seed` and writes a `NewGameRequestEvent`.
+#[derive(Message, Debug, Clone, Copy, Default)]
+pub struct StartDailyChallengeRequestEvent;
+
+/// Request to toggle the Stats overlay. Fired by the HUD Menu-popover
+/// "Stats" row alongside the existing `S` accelerator.
+#[derive(Message, Debug, Clone, Copy, Default)]
+pub struct ToggleStatsRequestEvent;
+
+/// Request to toggle the Achievements overlay. Fired by the HUD
+/// Menu-popover "Achievements" row alongside the existing `A` accelerator.
+#[derive(Message, Debug, Clone, Copy, Default)]
+pub struct ToggleAchievementsRequestEvent;
+
+/// Request to toggle the Profile overlay. Fired by the HUD Menu-popover
+/// "Profile" row alongside the existing `P` accelerator.
+#[derive(Message, Debug, Clone, Copy, Default)]
+pub struct ToggleProfileRequestEvent;
+
+/// Request to toggle the Settings overlay. Fired by the HUD Menu-popover
+/// "Settings" row alongside the existing `O` accelerator.
+#[derive(Message, Debug, Clone, Copy, Default)]
+pub struct ToggleSettingsRequestEvent;
+
+/// Request to toggle the Leaderboard overlay. Fired by the HUD
+/// Menu-popover "Leaderboard" row alongside the existing `L` accelerator.
+#[derive(Message, Debug, Clone, Copy, Default)]
+pub struct ToggleLeaderboardRequestEvent;
+
 /// Fired by `SyncPlugin` after a pull task resolves and the merged result has
 /// been persisted to disk. `Ok(SyncResponse)` carries the merged payload plus
 /// any `ConflictReport`s the merge produced. `Err(String)` carries a

solitaire_engine/src/help_plugin.rs

@@ -1,30 +1,39 @@
 //! Toggleable on-screen help / cheat sheet showing keyboard bindings.
 //!
-//! Press **F1** to toggle. Listed shortcuts are grouped by intent —
+//! Reachable from the HUD "Help" button (per the UI-first principle); `F1`
+//! is an optional accelerator. Listed shortcuts are grouped by intent —
 //! gameplay, modes, and overlays.
 
 use bevy::prelude::*;
 
+use crate::events::HelpRequestEvent;
+
 /// Marker on the help overlay root node.
 #[derive(Component, Debug)]
 pub struct HelpScreen;
 
-/// Spawns and despawns the help/controls overlay shown when the player presses H (or the help button).
-/// All hotkeys and gesture guides live here.
+/// Spawns and despawns the help / controls overlay shown when the player
+/// clicks the "Help" HUD button or presses `F1`. All hotkeys and gesture
+/// guides live here.
 pub struct HelpPlugin;
 
 impl Plugin for HelpPlugin {
     fn build(&self, app: &mut App) {
-        app.add_systems(Update, toggle_help_screen);
+        app.add_message::<HelpRequestEvent>()
+            .add_systems(Update, toggle_help_screen);
     }
 }
 
 fn toggle_help_screen(
     mut commands: Commands,
     keys: Res<ButtonInput<KeyCode>>,
+    mut requests: MessageReader<HelpRequestEvent>,
     screens: Query<Entity, With<HelpScreen>>,
 ) {
-    if !keys.just_pressed(KeyCode::F1) {
+    // Either F1 or a click on the HUD "Help" button (which fires
+    // HelpRequestEvent) toggles the overlay.
+    let button_clicked = requests.read().count() > 0;
+    if !keys.just_pressed(KeyCode::F1) && !button_clicked {
         return;
     }
     if let Ok(entity) = screens.single() {

solitaire_engine/src/hud_plugin.rs

@@ -12,8 +12,16 @@ use solitaire_core::game_state::{DrawMode, GameMode};
 use solitaire_core::pile::PileType;
 
 use crate::auto_complete_plugin::AutoCompleteState;
+use crate::challenge_plugin::CHALLENGE_UNLOCK_LEVEL;
 use crate::daily_challenge_plugin::DailyChallengeResource;
-use crate::events::{InfoToastEvent, NewGameRequestEvent};
+use crate::progress_plugin::ProgressResource;
+use crate::events::{
+    HelpRequestEvent, InfoToastEvent, NewGameRequestEvent, PauseRequestEvent,
+    StartChallengeRequestEvent, StartDailyChallengeRequestEvent, StartTimeAttackRequestEvent,
+    StartZenRequestEvent, ToggleAchievementsRequestEvent, ToggleLeaderboardRequestEvent,
+    ToggleProfileRequestEvent, ToggleSettingsRequestEvent, ToggleStatsRequestEvent,
+    UndoRequestEvent,
+};
 use crate::font_plugin::FontResource;
 use crate::game_plugin::GameMutation;
 use crate::resources::GameStateResource;
@@ -84,30 +92,130 @@ pub struct HudDrawCycle;
 #[derive(Component, Debug)]
 pub struct HudSelection;
 
-/// Marker on the New Game action button anchored top-right of the play area.
-/// Click fires [`NewGameRequestEvent`]; the existing `ConfirmNewGameScreen`
-/// modal then handles confirmation when a game is in progress.
+/// Marker shared by every clickable HUD action button so a single
+/// `paint_action_buttons` system can recolour them on hover/press without
+/// each button needing its own paint handler.
+#[derive(Component, Debug)]
+pub struct ActionButton;
+
+/// Marker on the "New Game" action button anchored top-right of the play
+/// area. Click fires [`NewGameRequestEvent`]; the existing
+/// `ConfirmNewGameScreen` modal handles confirmation when a game is in
+/// progress.
 #[derive(Component, Debug)]
 pub struct NewGameButton;
 
+/// Marker on the "Undo" action button. Click fires [`UndoRequestEvent`],
+/// mirroring the `U` keyboard accelerator.
+#[derive(Component, Debug)]
+pub struct UndoButton;
+
+/// Marker on the "Pause" action button. Click fires [`PauseRequestEvent`],
+/// mirroring the `Esc` keyboard accelerator. The pause overlay's own resume
+/// affordance dismisses it from the paused state.
+#[derive(Component, Debug)]
+pub struct PauseButton;
+
+/// Marker on the "Help" action button. Click fires [`HelpRequestEvent`],
+/// mirroring the `F1` keyboard accelerator.
+#[derive(Component, Debug)]
+pub struct HelpButton;
+
+/// Marker on the "Modes" action button. Click toggles the [`ModesPopover`]
+/// (a small dropdown panel) below the action bar. Each popover row starts
+/// the corresponding game mode.
+#[derive(Component, Debug)]
+pub struct ModesButton;
+
+/// Marker on the dropdown panel that opens below the [`ModesButton`].
+/// Spawned on first click, despawned on second click or on mode select.
+#[derive(Component, Debug)]
+pub struct ModesPopover;
+
+/// One row inside the [`ModesPopover`]. The variant carries which event
+/// the click handler should fire — Classic uses `NewGameRequestEvent`
+/// directly, the others go through their `Start*RequestEvent` so the
+/// existing keyboard handler's level gate / resource setup runs.
+#[derive(Component, Debug, Clone, Copy)]
+pub enum ModeOption {
+    Classic,
+    DailyChallenge,
+    Zen,
+    Challenge,
+    TimeAttack,
+}
+
+/// Marker on the "Menu" action button. Click toggles the [`MenuPopover`]
+/// which exposes the Stats / Achievements / Profile / Settings /
+/// Leaderboard overlays without needing the S/A/P/O/L hotkeys.
+#[derive(Component, Debug)]
+pub struct MenuButton;
+
+/// Marker on the dropdown panel that opens below the [`MenuButton`].
+#[derive(Component, Debug)]
+pub struct MenuPopover;
+
+/// One row inside the [`MenuPopover`]. The variant selects which
+/// `Toggle*RequestEvent` the click handler fires.
+#[derive(Component, Debug, Clone, Copy)]
+pub enum MenuOption {
+    Stats,
+    Achievements,
+    Profile,
+    Settings,
+    Leaderboard,
+}
+
 /// HUD Z-layer — above cards (which start at z=0) but below overlay screens.
 const Z_HUD: i32 = 50;
 
-/// Idle / hover / pressed colours for the New Game action button.
-const NEW_GAME_BTN_IDLE: Color = Color::srgb(0.20, 0.55, 0.85);
-const NEW_GAME_BTN_HOVER: Color = Color::srgb(0.28, 0.65, 0.95);
-const NEW_GAME_BTN_PRESSED: Color = Color::srgb(0.15, 0.45, 0.75);
+/// Idle / hover / pressed colours shared by every action button.
+const ACTION_BTN_IDLE: Color = Color::srgb(0.20, 0.55, 0.85);
+const ACTION_BTN_HOVER: Color = Color::srgb(0.28, 0.65, 0.95);
+const ACTION_BTN_PRESSED: Color = Color::srgb(0.15, 0.45, 0.75);
 
 /// Renders the in-game HUD: score counter, move counter, elapsed timer, draw-mode indicator, and the auto-complete badge that lights up when the game is solvable without further input.
 pub struct HudPlugin;
 
 impl Plugin for HudPlugin {
     fn build(&self, app: &mut App) {
-        app.add_systems(Startup, (spawn_hud, spawn_new_game_button))
+        // The click handlers write to messages registered elsewhere by their
+        // owning plugins (`GamePlugin`, `PausePlugin`, `HelpPlugin`,
+        // `challenge_plugin`, `daily_challenge_plugin`, `time_attack_plugin`,
+        // `input_plugin`). Re-register defensively so the HUD plugin works in
+        // isolation under `MinimalPlugins` (tests). `add_message` is
+        // idempotent.
+        app.add_message::<NewGameRequestEvent>()
+            .add_message::<UndoRequestEvent>()
+            .add_message::<PauseRequestEvent>()
+            .add_message::<HelpRequestEvent>()
+            .add_message::<StartZenRequestEvent>()
+            .add_message::<StartChallengeRequestEvent>()
+            .add_message::<StartTimeAttackRequestEvent>()
+            .add_message::<StartDailyChallengeRequestEvent>()
+            .add_message::<ToggleStatsRequestEvent>()
+            .add_message::<ToggleAchievementsRequestEvent>()
+            .add_message::<ToggleProfileRequestEvent>()
+            .add_message::<ToggleSettingsRequestEvent>()
+            .add_message::<ToggleLeaderboardRequestEvent>()
+            .add_systems(Startup, (spawn_hud, spawn_action_buttons))
             .add_systems(Update, update_hud.after(GameMutation))
             .add_systems(Update, announce_auto_complete.after(GameMutation))
             .add_systems(Update, update_selection_hud)
-            .add_systems(Update, (handle_new_game_button, paint_new_game_button));
+            .add_systems(
+                Update,
+                (
+                    handle_new_game_button,
+                    handle_undo_button,
+                    handle_pause_button,
+                    handle_help_button,
+                    handle_modes_button,
+                    handle_mode_option_click,
+                    handle_menu_button,
+                    handle_menu_option_click,
+                    paint_action_buttons,
+                ),
+            );
     }
 }
 
@@ -186,15 +294,15 @@ fn spawn_hud(font_res: Option<Res<FontResource>>, mut commands: Commands) {
         });
 }
 
-/// Spawns the New Game action button anchored to the top-right of the
-/// window. Click fires [`NewGameRequestEvent`]; the existing
-/// `ConfirmNewGameScreen` modal in `GamePlugin` handles confirmation when
-/// a game is in progress, and starts a fresh deal otherwise.
+/// Spawns the action button bar anchored to the top-right of the window.
+/// Each child is a clickable button mirroring a keyboard accelerator —
+/// per the UI-first principle (CLAUDE.md / ARCHITECTURE.md §1) the buttons
+/// are the primary entry point and the hotkeys are optional.
 ///
-/// Per the UI-first principle (CLAUDE.md / ARCHITECTURE.md §1), this
-/// button is the primary entry point for starting a new game. The `N`
-/// keyboard shortcut is an optional accelerator.
-fn spawn_new_game_button(font_res: Option<Res<FontResource>>, mut commands: Commands) {
+/// Order (left → right): Undo, Pause, Help, New Game. New Game is rightmost
+/// because it's the most consequential action; the destructive button sits
+/// on its own visual edge.
+fn spawn_action_buttons(font_res: Option<Res<FontResource>>, mut commands: Commands) {
     let font = TextFont {
         font: font_res.as_ref().map(|f| f.0.clone()).unwrap_or_default(),
         font_size: 16.0,
@@ -202,35 +310,59 @@ fn spawn_new_game_button(font_res: Option<Res<FontResource>>, mut commands: Comm
     };
     commands
         .spawn((
-            NewGameButton,
-            Button,
             Node {
                 position_type: PositionType::Absolute,
                 right: Val::Px(12.0),
                 top: Val::Px(8.0),
+                flex_direction: FlexDirection::Row,
+                column_gap: Val::Px(8.0),
+                align_items: AlignItems::Center,
+                ..default()
+            },
+            ZIndex(Z_HUD),
+        ))
+        .with_children(|row| {
+            spawn_action_button(row, MenuButton, "Menu \u{25BE}", &font);
+            spawn_action_button(row, UndoButton, "Undo", &font);
+            spawn_action_button(row, PauseButton, "Pause", &font);
+            spawn_action_button(row, HelpButton, "Help", &font);
+            spawn_action_button(row, ModesButton, "Modes \u{25BE}", &font);
+            spawn_action_button(row, NewGameButton, "New Game", &font);
+        });
+}
+
+/// Spawns a single action button as a child of `row`. Each button shares
+/// the same node geometry, idle colour, and `ActionButton` marker so
+/// `paint_action_buttons` can recolour all of them with one query.
+fn spawn_action_button<M: Component>(
+    row: &mut ChildSpawnerCommands,
+    marker: M,
+    label: &str,
+    font: &TextFont,
+) {
+    row.spawn((
+        marker,
+        ActionButton,
+        Button,
+        Node {
             padding: UiRect::axes(Val::Px(14.0), Val::Px(8.0)),
             justify_content: JustifyContent::Center,
             align_items: AlignItems::Center,
             border_radius: BorderRadius::all(Val::Px(6.0)),
             ..default()
         },
-            BackgroundColor(NEW_GAME_BTN_IDLE),
-            ZIndex(Z_HUD),
+        BackgroundColor(ACTION_BTN_IDLE),
     ))
     .with_children(|b| {
-            b.spawn((
-                Text::new("New Game"),
-                font,
-                TextColor(Color::WHITE),
-            ));
+        b.spawn((Text::new(label), font.clone(), TextColor(Color::WHITE)));
     });
 }
 
-/// Click handler for the New Game button — fires `NewGameRequestEvent`.
-///
 /// `Changed<Interaction>` filter ensures we only react on the frame the
 /// interaction state transitions, avoiding repeat events while the button
-/// is held down.
+/// is held down. Each click handler fires the corresponding request event,
+/// which `pause_plugin` / `help_plugin` / `game_plugin` consume alongside
+/// their existing keyboard handlers.
 fn handle_new_game_button(
     interaction_query: Query<&Interaction, (With<NewGameButton>, Changed<Interaction>)>,
     mut new_game: MessageWriter<NewGameRequestEvent>,
@@ -242,20 +374,322 @@ fn handle_new_game_button(
     }
 }
 
-/// Visual feedback for the New Game button — paints idle / hover / pressed
-/// states by mutating the `BackgroundColor` whenever the interaction state
-/// changes.
-fn paint_new_game_button(
+fn handle_undo_button(
+    interaction_query: Query<&Interaction, (With<UndoButton>, Changed<Interaction>)>,
+    mut undo: MessageWriter<UndoRequestEvent>,
+) {
+    for interaction in &interaction_query {
+        if *interaction == Interaction::Pressed {
+            undo.write(UndoRequestEvent);
+        }
+    }
+}
+
+fn handle_pause_button(
+    interaction_query: Query<&Interaction, (With<PauseButton>, Changed<Interaction>)>,
+    mut pause: MessageWriter<PauseRequestEvent>,
+) {
+    for interaction in &interaction_query {
+        if *interaction == Interaction::Pressed {
+            pause.write(PauseRequestEvent);
+        }
+    }
+}
+
+fn handle_help_button(
+    interaction_query: Query<&Interaction, (With<HelpButton>, Changed<Interaction>)>,
+    mut help: MessageWriter<HelpRequestEvent>,
+) {
+    for interaction in &interaction_query {
+        if *interaction == Interaction::Pressed {
+            help.write(HelpRequestEvent);
+        }
+    }
+}
+
+/// Toggles the [`ModesPopover`]: spawns it on first click, despawns it on
+/// second click. Mode rows are populated per the player's current level so
+/// only unlocked options appear.
+fn handle_modes_button(
+    interaction_query: Query<&Interaction, (With<ModesButton>, Changed<Interaction>)>,
+    popovers: Query<Entity, With<ModesPopover>>,
+    progress: Option<Res<ProgressResource>>,
+    daily: Option<Res<DailyChallengeResource>>,
+    font_res: Option<Res<FontResource>>,
+    mut commands: Commands,
+) {
+    let pressed = interaction_query
+        .iter()
+        .any(|i| *i == Interaction::Pressed);
+    if !pressed {
+        return;
+    }
+    if let Ok(entity) = popovers.single() {
+        commands.entity(entity).despawn();
+    } else {
+        spawn_modes_popover(
+            &mut commands,
+            progress.as_deref(),
+            daily.as_deref(),
+            font_res.as_deref(),
+        );
+    }
+}
+
+/// Spawns the modes popover anchored just below the action bar's right
+/// edge. Always includes Classic; includes Daily Challenge when a daily
+/// resource is loaded; includes Zen / Challenge / Time Attack once the
+/// player reaches the challenge unlock level.
+fn spawn_modes_popover(
+    commands: &mut Commands,
+    progress: Option<&ProgressResource>,
+    daily: Option<&DailyChallengeResource>,
+    font_res: Option<&FontResource>,
+) {
+    let level = progress.map_or(0, |p| p.0.level);
+    let font = TextFont {
+        font: font_res.map(|f| f.0.clone()).unwrap_or_default(),
+        font_size: 15.0,
+        ..default()
+    };
+
+    let mut rows: Vec<(ModeOption, &'static str)> = vec![(ModeOption::Classic, "Classic")];
+    if daily.is_some() {
+        rows.push((ModeOption::DailyChallenge, "Daily Challenge"));
+    }
+    if level >= CHALLENGE_UNLOCK_LEVEL {
+        rows.push((ModeOption::Zen, "Zen"));
+        rows.push((ModeOption::Challenge, "Challenge"));
+        rows.push((ModeOption::TimeAttack, "Time Attack"));
+    }
+
+    commands
+        .spawn((
+            ModesPopover,
+            Node {
+                position_type: PositionType::Absolute,
+                right: Val::Px(12.0),
+                top: Val::Px(50.0),
+                flex_direction: FlexDirection::Column,
+                row_gap: Val::Px(4.0),
+                padding: UiRect::all(Val::Px(8.0)),
+                border_radius: BorderRadius::all(Val::Px(6.0)),
+                ..default()
+            },
+            BackgroundColor(Color::srgba(0.10, 0.12, 0.15, 0.96)),
+            ZIndex(Z_HUD + 5),
+        ))
+        .with_children(|panel| {
+            for (option, label) in rows {
+                panel
+                    .spawn((
+                        option,
+                        ActionButton,
+                        Button,
+                        Node {
+                            padding: UiRect::axes(Val::Px(12.0), Val::Px(6.0)),
+                            justify_content: JustifyContent::FlexStart,
+                            align_items: AlignItems::Center,
+                            min_width: Val::Px(150.0),
+                            border_radius: BorderRadius::all(Val::Px(4.0)),
+                            ..default()
+                        },
+                        BackgroundColor(ACTION_BTN_IDLE),
+                    ))
+                    .with_children(|b| {
+                        b.spawn((Text::new(label), font.clone(), TextColor(Color::WHITE)));
+                    });
+            }
+        });
+}
+
+/// Dispatches the click on a popover row to the matching request event,
+/// then despawns the popover.
+///
+/// Classic uses [`NewGameRequestEvent`] directly; the other modes use
+/// their `Start*RequestEvent` so the existing keyboard handler runs
+/// (level gates, `TimeAttackResource` setup, daily seed lookup, etc.) —
+/// the popover stays a thin entry point and never duplicates that logic.
+#[allow(clippy::too_many_arguments)]
+fn handle_mode_option_click(
+    interaction_query: Query<(&Interaction, &ModeOption), Changed<Interaction>>,
+    popovers: Query<Entity, With<ModesPopover>>,
+    mut new_game: MessageWriter<NewGameRequestEvent>,
+    mut zen: MessageWriter<StartZenRequestEvent>,
+    mut challenge: MessageWriter<StartChallengeRequestEvent>,
+    mut time_attack: MessageWriter<StartTimeAttackRequestEvent>,
+    mut daily: MessageWriter<StartDailyChallengeRequestEvent>,
+    mut commands: Commands,
+) {
+    let mut clicked_any = false;
+    for (interaction, option) in &interaction_query {
+        if *interaction != Interaction::Pressed {
+            continue;
+        }
+        clicked_any = true;
+        match option {
+            ModeOption::Classic => {
+                new_game.write(NewGameRequestEvent::default());
+            }
+            ModeOption::DailyChallenge => {
+                daily.write(StartDailyChallengeRequestEvent);
+            }
+            ModeOption::Zen => {
+                zen.write(StartZenRequestEvent);
+            }
+            ModeOption::Challenge => {
+                challenge.write(StartChallengeRequestEvent);
+            }
+            ModeOption::TimeAttack => {
+                time_attack.write(StartTimeAttackRequestEvent);
+            }
+        }
+    }
+    if clicked_any
+        && let Ok(entity) = popovers.single() {
+            commands.entity(entity).despawn();
+        }
+}
+
+/// Toggles the [`MenuPopover`]: spawns it on first click, despawns it on
+/// second click. The popover lists the five overlays previously only
+/// reachable via the S / A / P / O / L hotkeys.
+fn handle_menu_button(
+    interaction_query: Query<&Interaction, (With<MenuButton>, Changed<Interaction>)>,
+    popovers: Query<Entity, With<MenuPopover>>,
+    font_res: Option<Res<FontResource>>,
+    mut commands: Commands,
+) {
+    let pressed = interaction_query
+        .iter()
+        .any(|i| *i == Interaction::Pressed);
+    if !pressed {
+        return;
+    }
+    if let Ok(entity) = popovers.single() {
+        commands.entity(entity).despawn();
+    } else {
+        spawn_menu_popover(&mut commands, font_res.as_deref());
+    }
+}
+
+/// Spawns the menu popover anchored just below the action bar, with one
+/// row per overlay. Each row dispatches its corresponding
+/// `Toggle*RequestEvent` so the existing toggle handler runs (and the
+/// HUD never duplicates spawn / despawn / fetch logic).
+fn spawn_menu_popover(commands: &mut Commands, font_res: Option<&FontResource>) {
+    let font = TextFont {
+        font: font_res.map(|f| f.0.clone()).unwrap_or_default(),
+        font_size: 15.0,
+        ..default()
+    };
+
+    let rows: [(MenuOption, &'static str); 5] = [
+        (MenuOption::Stats, "Stats"),
+        (MenuOption::Achievements, "Achievements"),
+        (MenuOption::Profile, "Profile"),
+        (MenuOption::Settings, "Settings"),
+        (MenuOption::Leaderboard, "Leaderboard"),
+    ];
+
+    commands
+        .spawn((
+            MenuPopover,
+            Node {
+                position_type: PositionType::Absolute,
+                right: Val::Px(12.0),
+                top: Val::Px(50.0),
+                flex_direction: FlexDirection::Column,
+                row_gap: Val::Px(4.0),
+                padding: UiRect::all(Val::Px(8.0)),
+                border_radius: BorderRadius::all(Val::Px(6.0)),
+                ..default()
+            },
+            BackgroundColor(Color::srgba(0.10, 0.12, 0.15, 0.96)),
+            ZIndex(Z_HUD + 5),
+        ))
+        .with_children(|panel| {
+            for (option, label) in rows {
+                panel
+                    .spawn((
+                        option,
+                        ActionButton,
+                        Button,
+                        Node {
+                            padding: UiRect::axes(Val::Px(12.0), Val::Px(6.0)),
+                            justify_content: JustifyContent::FlexStart,
+                            align_items: AlignItems::Center,
+                            min_width: Val::Px(150.0),
+                            border_radius: BorderRadius::all(Val::Px(4.0)),
+                            ..default()
+                        },
+                        BackgroundColor(ACTION_BTN_IDLE),
+                    ))
+                    .with_children(|b| {
+                        b.spawn((Text::new(label), font.clone(), TextColor(Color::WHITE)));
+                    });
+            }
+        });
+}
+
+/// Dispatches the click on a menu row to the matching toggle event,
+/// then despawns the popover.
+#[allow(clippy::too_many_arguments)]
+fn handle_menu_option_click(
+    interaction_query: Query<(&Interaction, &MenuOption), Changed<Interaction>>,
+    popovers: Query<Entity, With<MenuPopover>>,
+    mut stats: MessageWriter<ToggleStatsRequestEvent>,
+    mut achievements: MessageWriter<ToggleAchievementsRequestEvent>,
+    mut profile: MessageWriter<ToggleProfileRequestEvent>,
+    mut settings: MessageWriter<ToggleSettingsRequestEvent>,
+    mut leaderboard: MessageWriter<ToggleLeaderboardRequestEvent>,
+    mut commands: Commands,
+) {
+    let mut clicked_any = false;
+    for (interaction, option) in &interaction_query {
+        if *interaction != Interaction::Pressed {
+            continue;
+        }
+        clicked_any = true;
+        match option {
+            MenuOption::Stats => {
+                stats.write(ToggleStatsRequestEvent);
+            }
+            MenuOption::Achievements => {
+                achievements.write(ToggleAchievementsRequestEvent);
+            }
+            MenuOption::Profile => {
+                profile.write(ToggleProfileRequestEvent);
+            }
+            MenuOption::Settings => {
+                settings.write(ToggleSettingsRequestEvent);
+            }
+            MenuOption::Leaderboard => {
+                leaderboard.write(ToggleLeaderboardRequestEvent);
+            }
+        }
+    }
+    if clicked_any
+        && let Ok(entity) = popovers.single() {
+            commands.entity(entity).despawn();
+        }
+}
+
+/// Visual feedback for every action button — paints idle / hover / pressed
+/// states by mutating `BackgroundColor` whenever the interaction state
+/// changes. One query covers all action buttons via the shared
+/// `ActionButton` marker.
+fn paint_action_buttons(
     mut buttons: Query<
         (&Interaction, &mut BackgroundColor),
-        (With<NewGameButton>, Changed<Interaction>),
+        (With<ActionButton>, Changed<Interaction>),
     >,
 ) {
     for (interaction, mut bg) in &mut buttons {
         bg.0 = match interaction {
-            Interaction::Pressed => NEW_GAME_BTN_PRESSED,
-            Interaction::Hovered => NEW_GAME_BTN_HOVER,
-            Interaction::None => NEW_GAME_BTN_IDLE,
+            Interaction::Pressed => ACTION_BTN_PRESSED,
+            Interaction::Hovered => ACTION_BTN_HOVER,
+            Interaction::None => ACTION_BTN_IDLE,
         };
     }
 }

solitaire_engine/src/input_plugin.rs

@@ -36,7 +36,8 @@ use solitaire_core::game_state::DrawMode;
 use crate::challenge_plugin::CHALLENGE_UNLOCK_LEVEL;
 use crate::events::{
     DrawRequestEvent, ForfeitEvent, HintVisualEvent, InfoToastEvent, MoveRejectedEvent,
-    MoveRequestEvent, NewGameConfirmEvent, NewGameRequestEvent, StateChangedEvent, UndoRequestEvent,
+    MoveRequestEvent, NewGameConfirmEvent, NewGameRequestEvent, StartZenRequestEvent,
+    StateChangedEvent, UndoRequestEvent,
 };
 use crate::game_plugin::GameMutation;
 use crate::pause_plugin::PausedResource;
@@ -84,6 +85,7 @@ impl Plugin for InputPlugin {
         app.init_resource::<HintCycleIndex>()
             .init_resource::<KeyboardConfirmState>()
             .add_message::<NewGameConfirmEvent>()
+            .add_message::<StartZenRequestEvent>()
             .add_message::<InfoToastEvent>()
             .add_message::<ForfeitEvent>()
             .add_message::<HintVisualEvent>()
@@ -147,6 +149,7 @@ fn handle_keyboard_core(
     mut ev: CoreKeyboardMessages<'_>,
     mut time_attack: Option<ResMut<TimeAttackResource>>,
     selection: Option<Res<SelectionState>>,
+    mut zen_requests: MessageReader<StartZenRequestEvent>,
 ) {
     if paused.is_some_and(|p| p.0) {
         return;
@@ -209,11 +212,13 @@ fn handle_keyboard_core(
         }
     }
 
-    if keys.just_pressed(KeyCode::KeyZ) {
+    let zen_clicked = zen_requests.read().count() > 0;
+    if keys.just_pressed(KeyCode::KeyZ) || zen_clicked {
         // Cancel any pending forfeit when the player takes another action.
         confirm.forfeit_countdown = 0.0;
         // Zen / Challenge / Time Attack are gated to level >= CHALLENGE_UNLOCK_LEVEL.
-        // X is gated separately by ChallengePlugin.
+        // X is gated separately by ChallengePlugin. Either Z or the HUD
+        // Modes-popover "Zen" row reaches this branch.
         let level = progress.as_ref().map_or(0, |p| p.0.level);
         if level >= CHALLENGE_UNLOCK_LEVEL {
             ev.new_game.write(NewGameRequestEvent {

solitaire_engine/src/leaderboard_plugin.rs

@@ -14,7 +14,7 @@ use bevy::tasks::{futures_lite::future, AsyncComputeTaskPool, Task};
 use solitaire_data::settings::SyncBackend;
 use solitaire_sync::LeaderboardEntry;
 
-use crate::events::InfoToastEvent;
+use crate::events::{InfoToastEvent, ToggleLeaderboardRequestEvent};
 use crate::settings_plugin::SettingsResource;
 use crate::sync_plugin::SyncProviderResource;
 
@@ -73,6 +73,7 @@ impl Plugin for LeaderboardPlugin {
             .init_resource::<ClosedThisFrame>()
             .init_resource::<OptInTask>()
             .init_resource::<OptOutTask>()
+            .add_message::<ToggleLeaderboardRequestEvent>()
             .add_systems(
                 Update,
                 (
@@ -99,18 +100,22 @@ fn reset_closed_flag(mut flag: ResMut<ClosedThisFrame>) {
     flag.0 = false;
 }
 
-/// `L` key — open or close the leaderboard panel.
-/// On open, starts a new fetch if no data is cached or a fetch is not in flight.
+/// `L` keyboard accelerator or `ToggleLeaderboardRequestEvent` from the
+/// HUD Menu popover — open or close the leaderboard panel. On open,
+/// starts a new fetch if no data is cached or a fetch is not in flight.
+#[allow(clippy::too_many_arguments)]
 fn toggle_leaderboard_screen(
     mut commands: Commands,
     keys: Res<ButtonInput<KeyCode>>,
+    mut requests: MessageReader<ToggleLeaderboardRequestEvent>,
     screens: Query<Entity, With<LeaderboardScreen>>,
     data: Res<LeaderboardResource>,
     provider: Option<Res<SyncProviderResource>>,
     mut task_res: ResMut<LeaderboardFetchTask>,
     mut closed_flag: ResMut<ClosedThisFrame>,
 ) {
-    if !keys.just_pressed(KeyCode::KeyL) {
+    let button_clicked = requests.read().count() > 0;
+    if !keys.just_pressed(KeyCode::KeyL) && !button_clicked {
         return;
     }
     if let Ok(entity) = screens.single() {

solitaire_engine/src/lib.rs

@@ -67,14 +67,21 @@ pub use font_plugin::{FontPlugin, FontResource};
 pub use cursor_plugin::CursorPlugin;
 pub use events::{
     AchievementUnlockedEvent, CardFaceRevealedEvent, CardFlippedEvent, DrawRequestEvent,
-    ForfeitEvent, GameWonEvent, HintVisualEvent, InfoToastEvent, ManualSyncRequestEvent,
-    MoveRejectedEvent, MoveRequestEvent, NewGameConfirmEvent, NewGameRequestEvent,
-    StateChangedEvent, SyncCompleteEvent, UndoRequestEvent, XpAwardedEvent,
+    ForfeitEvent, GameWonEvent, HelpRequestEvent, HintVisualEvent, InfoToastEvent,
+    ManualSyncRequestEvent, MoveRejectedEvent, MoveRequestEvent, NewGameConfirmEvent,
+    NewGameRequestEvent, PauseRequestEvent, StartChallengeRequestEvent,
+    StartDailyChallengeRequestEvent, StartTimeAttackRequestEvent, StartZenRequestEvent,
+    StateChangedEvent, SyncCompleteEvent, ToggleAchievementsRequestEvent,
+    ToggleLeaderboardRequestEvent, ToggleProfileRequestEvent, ToggleSettingsRequestEvent,
+    ToggleStatsRequestEvent, UndoRequestEvent, XpAwardedEvent,
 };
 pub use game_plugin::{ConfirmNewGameScreen, GameMutation, GameOverScreen, GamePlugin, GameStatePath};
 pub use help_plugin::{HelpPlugin, HelpScreen};
 pub use home_plugin::{HomePlugin, HomeScreen};
-pub use hud_plugin::{HudAutoComplete, HudPlugin};
+pub use hud_plugin::{
+    ActionButton, HelpButton, HudAutoComplete, HudPlugin, MenuButton, MenuOption, MenuPopover,
+    ModeOption, ModesButton, ModesPopover, NewGameButton, PauseButton, UndoButton,
+};
 pub use leaderboard_plugin::{LeaderboardPlugin, LeaderboardResource, LeaderboardScreen};
 pub use input_plugin::InputPlugin;
 pub use onboarding_plugin::{OnboardingPlugin, OnboardingScreen};

solitaire_engine/src/pause_plugin.rs

@@ -19,7 +19,7 @@ use bevy::prelude::*;
 use solitaire_core::game_state::DrawMode;
 use solitaire_data::save_game_state_to;
 
-use crate::events::StateChangedEvent;
+use crate::events::{PauseRequestEvent, StateChangedEvent};
 use crate::game_plugin::{GameOverScreen, GameStatePath};
 use crate::progress_plugin::ProgressResource;
 use crate::resources::{DragState, GameStateResource};
@@ -58,6 +58,7 @@ impl Plugin for PausePlugin {
         // events first, but calling add_event again is always safe.
         app.add_message::<SettingsChangedEvent>()
             .add_message::<StateChangedEvent>()
+            .add_message::<PauseRequestEvent>()
             .init_resource::<PausedResource>()
             .add_systems(
                 Update,
@@ -75,6 +76,7 @@ impl Plugin for PausePlugin {
 fn toggle_pause(
     mut commands: Commands,
     keys: Res<ButtonInput<KeyCode>>,
+    mut requests: MessageReader<PauseRequestEvent>,
     mut paused: ResMut<PausedResource>,
     screens: Query<Entity, With<PauseScreen>>,
     game_over_screens: Query<Entity, With<GameOverScreen>>,
@@ -87,7 +89,11 @@ fn toggle_pause(
     mut changed: MessageWriter<StateChangedEvent>,
     selection: Option<Res<SelectionState>>,
 ) {
-    if !keys.just_pressed(KeyCode::Escape) {
+    // Either Esc or a click on the HUD "Pause" button (which fires
+    // PauseRequestEvent) opens or closes the overlay. Drain the queue so a
+    // burst of clicks doesn't queue future toggles.
+    let button_clicked = requests.read().count() > 0;
+    if !keys.just_pressed(KeyCode::Escape) && !button_clicked {
         return;
     }
     // If a card is currently selected, let SelectionPlugin handle this Escape

solitaire_engine/src/profile_plugin.rs

@@ -10,6 +10,7 @@ use solitaire_core::achievement::achievement_by_id;
 use solitaire_data::SyncBackend;
 
 use crate::achievement_plugin::AchievementsResource;
+use crate::events::ToggleProfileRequestEvent;
 use crate::progress_plugin::ProgressResource;
 use crate::resources::{SyncStatus, SyncStatusResource};
 use crate::settings_plugin::SettingsResource;
@@ -24,7 +25,8 @@ pub struct ProfilePlugin;
 
 impl Plugin for ProfilePlugin {
     fn build(&self, app: &mut App) {
-        app.add_systems(Update, toggle_profile_screen);
+        app.add_message::<ToggleProfileRequestEvent>()
+            .add_systems(Update, toggle_profile_screen);
     }
 }
 
@@ -32,6 +34,7 @@ impl Plugin for ProfilePlugin {
 fn toggle_profile_screen(
     mut commands: Commands,
     keys: Res<ButtonInput<KeyCode>>,
+    mut requests: MessageReader<ToggleProfileRequestEvent>,
     settings: Option<Res<SettingsResource>>,
     sync_status: Option<Res<SyncStatusResource>>,
     progress: Option<Res<ProgressResource>>,
@@ -39,7 +42,8 @@ fn toggle_profile_screen(
     stats: Option<Res<StatsResource>>,
     screens: Query<Entity, With<ProfileScreen>>,
 ) {
-    if !keys.just_pressed(KeyCode::KeyP) {
+    let button_clicked = requests.read().count() > 0;
+    if !keys.just_pressed(KeyCode::KeyP) && !button_clicked {
         return;
     }
     if let Ok(entity) = screens.single() {

solitaire_engine/src/settings_plugin.rs

@@ -16,7 +16,7 @@ use bevy::prelude::*;
 use solitaire_core::game_state::DrawMode;
 use solitaire_data::{load_settings_from, save_settings_to, settings_file_path, settings::Theme, AnimSpeed, Settings};
 
-use crate::events::ManualSyncRequestEvent;
+use crate::events::{ManualSyncRequestEvent, ToggleSettingsRequestEvent};
 use crate::progress_plugin::ProgressResource;
 use crate::resources::{SettingsScrollPos, SyncStatus, SyncStatusResource};
 
@@ -146,6 +146,7 @@ impl Plugin for SettingsPlugin {
             .init_resource::<SettingsScrollPos>()
             .add_message::<SettingsChangedEvent>()
             .add_message::<ManualSyncRequestEvent>()
+            .add_message::<ToggleSettingsRequestEvent>()
             .add_message::<bevy::input::mouse::MouseWheel>()
             .add_systems(Update, (handle_volume_keys, toggle_settings_screen, scroll_settings_panel));
 
@@ -206,12 +207,15 @@ fn handle_volume_keys(
     changed.write(SettingsChangedEvent(settings.0.clone()));
 }
 
-/// Opens or closes the Settings panel when `O` is pressed.
+/// Opens or closes the Settings panel — `O` keyboard accelerator or
+/// `ToggleSettingsRequestEvent` from the HUD Menu popover.
 fn toggle_settings_screen(
     keys: Res<ButtonInput<KeyCode>>,
+    mut requests: MessageReader<ToggleSettingsRequestEvent>,
     mut screen: ResMut<SettingsScreen>,
 ) {
-    if keys.just_pressed(KeyCode::KeyO) {
+    let button_clicked = requests.read().count() > 0;
+    if keys.just_pressed(KeyCode::KeyO) || button_clicked {
         screen.0 = !screen.0;
     }
 }

solitaire_engine/src/stats_plugin.rs

@@ -17,7 +17,9 @@ use solitaire_data::{
 
 use crate::auto_complete_plugin::AutoCompleteState;
 use crate::challenge_plugin::challenge_progress_label;
-use crate::events::{ForfeitEvent, GameWonEvent, InfoToastEvent, NewGameRequestEvent};
+use crate::events::{
+    ForfeitEvent, GameWonEvent, InfoToastEvent, NewGameRequestEvent, ToggleStatsRequestEvent,
+};
 use crate::game_plugin::GameMutation;
 use crate::progress_plugin::ProgressResource;
 use crate::resources::GameStateResource;
@@ -81,6 +83,7 @@ impl Plugin for StatsPlugin {
             .add_message::<NewGameRequestEvent>()
             .add_message::<ForfeitEvent>()
             .add_message::<InfoToastEvent>()
+            .add_message::<ToggleStatsRequestEvent>()
             // record_abandoned must read `move_count` BEFORE handle_new_game
             // clobbers it with a fresh game. These are NOT in StatsUpdate because
             // StatsUpdate (as a set) is ordered after GameMutation by external
@@ -181,12 +184,14 @@ fn handle_forfeit(
 fn toggle_stats_screen(
     mut commands: Commands,
     keys: Res<ButtonInput<KeyCode>>,
+    mut requests: MessageReader<ToggleStatsRequestEvent>,
     stats: Res<StatsResource>,
     progress: Option<Res<ProgressResource>>,
     time_attack: Option<Res<TimeAttackResource>>,
     screens: Query<Entity, With<StatsScreen>>,
 ) {
-    if !keys.just_pressed(KeyCode::KeyS) {
+    let button_clicked = requests.read().count() > 0;
+    if !keys.just_pressed(KeyCode::KeyS) && !button_clicked {
         return;
     }
     if let Ok(entity) = screens.single() {

solitaire_engine/src/time_attack_plugin.rs

@@ -8,7 +8,9 @@ use bevy::prelude::*;
 use solitaire_core::game_state::GameMode;
 
 use crate::challenge_plugin::CHALLENGE_UNLOCK_LEVEL;
-use crate::events::{GameWonEvent, InfoToastEvent, NewGameRequestEvent};
+use crate::events::{
+    GameWonEvent, InfoToastEvent, NewGameRequestEvent, StartTimeAttackRequestEvent,
+};
 use crate::game_plugin::GameMutation;
 use crate::progress_plugin::ProgressResource;
 use crate::resources::GameStateResource;
@@ -40,6 +42,7 @@ impl Plugin for TimeAttackPlugin {
             .add_message::<TimeAttackEndedEvent>()
             .add_message::<GameWonEvent>()
             .add_message::<NewGameRequestEvent>()
+            .add_message::<StartTimeAttackRequestEvent>()
             .add_message::<InfoToastEvent>()
             .add_systems(
                 Update,
@@ -52,12 +55,15 @@ impl Plugin for TimeAttackPlugin {
 
 fn handle_start_time_attack_request(
     keys: Res<ButtonInput<KeyCode>>,
+    mut requests: MessageReader<StartTimeAttackRequestEvent>,
     progress: Res<ProgressResource>,
     mut session: ResMut<TimeAttackResource>,
     mut new_game: MessageWriter<NewGameRequestEvent>,
     mut info_toast: MessageWriter<InfoToastEvent>,
 ) {
-    if !keys.just_pressed(KeyCode::KeyT) {
+    // Either T or the HUD Modes-popover "Time Attack" row triggers this.
+    let button_clicked = requests.read().count() > 0;
+    if !keys.just_pressed(KeyCode::KeyT) && !button_clicked {
         return;
     }
     if progress.0.level < CHALLENGE_UNLOCK_LEVEL {