feat(engine): ManualSyncRequestEvent + Sync Now button in settings

- Added ManualSyncRequestEvent to events.rs (exported from lib.rs).
- SyncPlugin now handles ManualSyncRequestEvent: if no pull is in
  flight, spawns a new AsyncComputeTaskPool task and sets status to
  Syncing. Ignores duplicate requests while a pull is active.
- Settings panel "Sync" section now shows the status text alongside a
  "Sync Now" button that fires ManualSyncRequestEvent.
- Cleaned up stale doc comment in input_plugin.rs (Esc pause note).

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

solitaire_engine/src/events.rs

@@ -61,3 +61,10 @@ pub struct CardFlippedEvent(pub u32);
 /// persistence/UI systems that need unlock metadata.
 #[derive(Event, Debug, Clone)]
 pub struct AchievementUnlockedEvent(pub AchievementRecord);
+
+/// Request to manually trigger a sync pull from the active backend.
+///
+/// Fired by the Settings panel "Sync Now" button. `SyncPlugin` responds by
+/// starting a new pull task if one is not already in flight.
+#[derive(Event, Debug, Clone, Copy, Default)]
+pub struct ManualSyncRequestEvent;

solitaire_engine/src/input_plugin.rs

@@ -4,8 +4,7 @@
 //! - `U` → `UndoRequestEvent`
 //! - `N` → `NewGameRequestEvent { seed: None }`
 //! - `D` → `DrawRequestEvent`
-//! - `Esc` → logged as a pause placeholder (no event yet; wired up when the
-//!   pause screen lands in a later phase)
+//! - `Esc` → handled by `PausePlugin` (overlay toggle + paused flag)
 //!
 //! Mouse:
 //! - Left-click on the stock pile (face-down top) → `DrawRequestEvent`

solitaire_engine/src/lib.rs

@@ -35,8 +35,8 @@ pub use animation_plugin::{AnimationPlugin, CardAnim};
 pub use audio_plugin::{AudioPlugin, AudioState, SoundLibrary};
 pub use card_plugin::{CardEntity, CardLabel, CardPlugin};
 pub use events::{
-    AchievementUnlockedEvent, CardFlippedEvent, DrawRequestEvent, GameWonEvent, MoveRejectedEvent,
-    MoveRequestEvent, NewGameRequestEvent, StateChangedEvent, UndoRequestEvent,
+    AchievementUnlockedEvent, CardFlippedEvent, DrawRequestEvent, GameWonEvent, ManualSyncRequestEvent,
+    MoveRejectedEvent, MoveRequestEvent, NewGameRequestEvent, StateChangedEvent, UndoRequestEvent,
 };
 pub use game_plugin::{GameMutation, GamePlugin};
 pub use help_plugin::{HelpPlugin, HelpScreen};

solitaire_engine/src/settings_plugin.rs

@@ -15,6 +15,7 @@ use bevy::prelude::*;
 use solitaire_core::game_state::DrawMode;
 use solitaire_data::{load_settings_from, save_settings_to, settings_file_path, settings::Theme, Settings};
 
+use crate::events::ManualSyncRequestEvent;
 use crate::resources::{SyncStatus, SyncStatusResource};
 
 /// Volume adjustment step applied by the `[` / `]` hotkeys.
@@ -69,6 +70,7 @@ enum SettingsButton {
     MusicUp,
     ToggleDrawMode,
     ToggleTheme,
+    SyncNow,
     Done,
 }
 
@@ -110,6 +112,7 @@ impl Plugin for SettingsPlugin {
             .insert_resource(SettingsStoragePath(self.storage_path.clone()))
             .init_resource::<SettingsScreen>()
             .add_event::<SettingsChangedEvent>()
+            .add_event::<ManualSyncRequestEvent>()
             .add_systems(Update, (handle_volume_keys, toggle_settings_screen));
 
         if self.ui_enabled {
@@ -245,6 +248,7 @@ fn handle_settings_buttons(
     mut screen: ResMut<SettingsScreen>,
     path: Res<SettingsStoragePath>,
     mut changed: EventWriter<SettingsChangedEvent>,
+    mut manual_sync: EventWriter<ManualSyncRequestEvent>,
     mut sfx_text: Query<&mut Text, (With<SfxVolumeText>, Without<MusicVolumeText>, Without<DrawModeText>, Without<ThemeText>)>,
     mut music_text: Query<&mut Text, (With<MusicVolumeText>, Without<SfxVolumeText>, Without<DrawModeText>, Without<ThemeText>)>,
     mut draw_text: Query<&mut Text, (With<DrawModeText>, Without<SfxVolumeText>, Without<MusicVolumeText>, Without<ThemeText>)>,
@@ -322,6 +326,9 @@ fn handle_settings_buttons(
                     **t = theme_label(&settings.0.theme);
                 }
             }
+            SettingsButton::SyncNow => {
+                manual_sync.send(ManualSyncRequestEvent);
+            }
             SettingsButton::Done => {
                 screen.0 = false;
             }
@@ -453,12 +460,40 @@ fn spawn_settings_panel(commands: &mut Commands, settings: &Settings, sync_statu
 
                 // --- Sync section ---
                 section_label(card, "Sync");
-                card.spawn((
-                    SyncStatusText,
-                    Text::new(sync_status.to_string()),
-                    TextFont { font_size: 16.0, ..default() },
-                    TextColor(Color::srgb(0.65, 0.65, 0.70)),
-                ));
+                card.spawn(Node {
+                    flex_direction: FlexDirection::Row,
+                    align_items: AlignItems::Center,
+                    column_gap: Val::Px(10.0),
+                    ..default()
+                })
+                .with_children(|row| {
+                    row.spawn((
+                        SyncStatusText,
+                        Text::new(sync_status.to_string()),
+                        TextFont { font_size: 16.0, ..default() },
+                        TextColor(Color::srgb(0.65, 0.65, 0.70)),
+                    ));
+                    // "Sync Now" button — hidden when SyncPlugin is not installed;
+                    // visible because ManualSyncRequestEvent is always registered.
+                    row.spawn((
+                        SettingsButton::SyncNow,
+                        Button,
+                        Node {
+                            padding: UiRect::axes(Val::Px(10.0), Val::Px(4.0)),
+                            justify_content: JustifyContent::Center,
+                            ..default()
+                        },
+                        BackgroundColor(Color::srgb(0.20, 0.30, 0.45)),
+                        BorderRadius::all(Val::Px(4.0)),
+                    ))
+                    .with_children(|b| {
+                        b.spawn((
+                            Text::new("Sync Now"),
+                            TextFont { font_size: 14.0, ..default() },
+                            TextColor(Color::WHITE),
+                        ));
+                    });
+                });
 
                 // Done button
                 card.spawn((

solitaire_engine/src/sync_plugin.rs

@@ -25,6 +25,7 @@ use solitaire_data::{
 use solitaire_sync::{merge, SyncPayload};
 
 use crate::achievement_plugin::{AchievementsResource, AchievementsStoragePath};
+use crate::events::ManualSyncRequestEvent;
 use crate::progress_plugin::{ProgressResource, ProgressStoragePath};
 use crate::resources::{SyncStatus, SyncStatusResource};
 use crate::stats_plugin::{StatsResource, StatsStoragePath};
@@ -92,8 +93,9 @@ impl Plugin for SyncPlugin {
             .init_resource::<SyncStatusResource>()
             .init_resource::<PullTaskResult>()
             .init_resource::<PullTask>()
+            .add_event::<ManualSyncRequestEvent>()
             .add_systems(Startup, start_pull)
-            .add_systems(Update, poll_pull_result)
+            .add_systems(Update, (poll_pull_result, handle_manual_sync_request))
             .add_systems(Last, push_on_exit);
     }
 }
@@ -116,6 +118,29 @@ fn start_pull(
     status.0 = SyncStatus::Syncing;
 }
 
+/// Update system: starts a new pull task when `ManualSyncRequestEvent` is
+/// received, but only if no pull is already in flight.
+fn handle_manual_sync_request(
+    mut events: EventReader<ManualSyncRequestEvent>,
+    provider: Res<SyncProviderResource>,
+    mut task_res: ResMut<PullTask>,
+    mut status: ResMut<SyncStatusResource>,
+) {
+    if events.is_empty() {
+        return;
+    }
+    events.clear();
+    if task_res.0.is_some() {
+        return; // Already pulling — ignore.
+    }
+    let provider = provider.0.clone();
+    let task = AsyncComputeTaskPool::get().spawn(async move {
+        provider.pull().await.map_err(|e| e.to_string())
+    });
+    task_res.0 = Some(task);
+    status.0 = SyncStatus::Syncing;
+}
+
 /// Update system: polls the pull task without blocking.
 ///
 /// When the task resolves successfully: