fix(android): UX-1/UX-5b/UX-7/BUG-3 — safe-area modals, glyph, help wrap, modal guard

- UX-1 (safe_area.rs): apply_safe_area_to_modal_scrims pads ModalScrim
  bottom by insets.bottom / scale_factor so Done buttons clear the
  gesture bar; fires on inset change + Added<ModalScrim>
- UX-5b (home_plugin.rs): replace Geometric Shapes (U+25xx, missing
  from FiraMono) with card suits U+2660/2665/2666
- UX-7 (help_plugin.rs): shorten Android ≡ button description to
  "Open menu (Stats, Settings, Profile...)" — fits one line at 360 dp
- BUG-3 (hud_plugin.rs): guard spawn_menu_popover with
  scrims.is_empty() so tapping ≡ while a modal is open is a no-op

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

solitaire_engine/src/hud_plugin.rs

@@ -40,6 +40,7 @@ use crate::resources::GameStateResource;
 use crate::selection_plugin::SelectionState;
 use crate::time_attack_plugin::TimeAttackResource;
 use crate::ui_focus::{FocusGroup, Focusable};
+use crate::ui_modal::ModalScrim;
 use crate::ui_tooltip::Tooltip;
 
 /// Marker on the score text node.
@@ -1074,6 +1075,7 @@ fn handle_menu_button(
     interaction_query: Query<&Interaction, (With<MenuButton>, Changed<Interaction>)>,
     popovers: Query<Entity, With<MenuPopover>>,
     backdrops: Query<Entity, With<MenuPopoverBackdrop>>,
+    scrims: Query<(), With<ModalScrim>>,
     font_res: Option<Res<FontResource>>,
     mut commands: Commands,
 ) {
@@ -1088,7 +1090,7 @@ fn handle_menu_button(
         for e in &backdrops {
             commands.entity(e).despawn();
         }
-    } else {
+    } else if scrims.is_empty() {
         spawn_menu_popover(&mut commands, font_res.as_deref());
     }
 }