fix(android): wire FiraMono to stock-empty label, strip raw safe-area px from HUD spawns, replace tofu chevrons

CR-1: apply_stock_empty_indicator now receives a Handle<Font> from FontResource
      so the ↺ label uses FiraMono (Arrows block) instead of the default font.
      All three callers (startup, state-change, window-resize) updated.

CR-4: spawn_hud_band, spawn_hud, spawn_hud_avatar, spawn_action_buttons no
      longer add SafeAreaInsets physical-pixel values to initial Val::Px offsets.
      SafeAreaAnchoredTop/Bottom systems already divide by scale_factor and apply
      the correct logical-pixel offset when insets arrive; the initial spawn value
      is always 0.0 at Startup on Android anyway. Removed now-unused SafeAreaInsets
      import and parameter from all four Startup systems.

H-9:  Difficulty section chevrons ▶/▼ (U+25BA/U+25BC, Geometric Shapes — not in
      FiraMono) replaced with ASCII ">"/"v" which render correctly on Android.

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

solitaire_engine/src/card_plugin.rs

@@ -1598,6 +1598,7 @@ fn apply_stock_empty_indicator<F: bevy::ecs::query::QueryFilter>(
     pile_markers: &mut Query<(Entity, &PileMarker, &mut Sprite), F>,
     label_children: &Query<(Entity, &ChildOf), With<StockEmptyLabel>>,
     layout: &Layout,
+    font: Handle<Font>,
 ) {
     let stock_empty = game
         .piles
@@ -1623,7 +1624,7 @@ fn apply_stock_empty_indicator<F: bevy::ecs::query::QueryFilter>(
                     b.spawn((
                         StockEmptyLabel,
                         Text2d::new("↺"),
-                        TextFont { font_size, ..default() },
+                        TextFont { font: font.clone(), font_size, ..default() },
                         TextColor(TEXT_PRIMARY.with_alpha(0.7)),
                         Transform::from_xyz(0.0, 0.0, 0.1),
                     ));
@@ -1649,16 +1650,19 @@ fn update_stock_empty_indicator_startup(
     mut commands: Commands,
     game: Res<GameStateResource>,
     layout: Option<Res<LayoutResource>>,
+    font_res: Option<Res<FontResource>>,
     mut pile_markers: Query<(Entity, &PileMarker, &mut Sprite)>,
     label_children: Query<(Entity, &ChildOf), With<StockEmptyLabel>>,
 ) {
     let Some(layout) = layout else { return };
+    let font = font_res.as_ref().map(|f| f.0.clone()).unwrap_or_default();
     apply_stock_empty_indicator(
         &mut commands,
         &game.0,
         &mut pile_markers,
         &label_children,
         &layout.0,
+        font,
     );
 }
 
@@ -1669,6 +1673,7 @@ fn update_stock_empty_indicator(
     mut commands: Commands,
     game: Res<GameStateResource>,
     layout: Option<Res<LayoutResource>>,
+    font_res: Option<Res<FontResource>>,
     mut pile_markers: Query<(Entity, &PileMarker, &mut Sprite)>,
     label_children: Query<(Entity, &ChildOf), With<StockEmptyLabel>>,
 ) {
@@ -1676,12 +1681,14 @@ fn update_stock_empty_indicator(
         return;
     }
     let Some(layout) = layout else { return };
+    let font = font_res.as_ref().map(|f| f.0.clone()).unwrap_or_default();
     apply_stock_empty_indicator(
         &mut commands,
         &game.0,
         &mut pile_markers,
         &label_children,
         &layout.0,
+        font,
     );
 }
 
@@ -1892,6 +1899,7 @@ fn snap_cards_on_window_resize(
     game: Option<Res<GameStateResource>>,
     layout: Option<Res<LayoutResource>>,
     card_images: Option<Res<CardImageSet>>,
+    font_res: Option<Res<FontResource>>,
     entities: Query<
         (Entity, &CardEntity, &mut Sprite, &mut Transform),
         (Without<CardLabel>, Without<CardShadow>, Without<CardBackFrame>),
@@ -1940,12 +1948,14 @@ fn snap_cards_on_window_resize(
         frame_query,
     );
 
+    let font = font_res.as_ref().map(|f| f.0.clone()).unwrap_or_default();
     apply_stock_empty_indicator(
         &mut commands,
         &game.0,
         &mut pile_markers,
         &label_children,
         &layout.0,
+        font,
     );
 
     throttle.last_applied_secs = now;