refactor(engine): ambiguity burn-down batch 4 — zero ambiguities, gate enforced

Clears the final 47 pairs and turns the ratchet into a hard gate
(AMBIGUITY_BASELINE = 0, assert_eq):

- HudButtons: the 14 HUD button/popover handlers run as one chain,
  before ui_focus::FocusKeys — Esc/keyboard consumption order is now
  defined (restore prompt → buttons/popovers → focus navigation →
  settings toggle) instead of scheduler-dependent.
- HUD text updaters (update_hud, update_selection_hud,
  update_won_previously) chained, in UiTextFx, after the new
  AutoComplete set (update_hud reads AutoCompleteState).
- restore_hud_on_modal → apply_hud_visibility chained before
  UpdateOnResize: HudVisibility writes, application, and the layout
  read happen in a fixed order.
- New writer sets UndoRequestWriters / InfoToastWriters (same
  self-ambiguous pattern as NewGameRequestWriters).
- Logic-before-paint: check_no_moves and the AutoComplete chain order
  before BoardVisuals; SettingsMutation after UpdateOnResize.
- MarkerVisuals set wraps the table painter chain; chrome fx declare
  disjointness from it.
- update_hud_typography after BoardVisuals; avatar/settings-toggle
  interaction handlers declared disjoint from HudButtons.

302 → 198 → 171 → 47 → 0 in four batches, one day. New systems now
fail CI unless they declare their ordering or their disjointness.

Closes #143

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

solitaire_engine/src/table_plugin.rs

@@ -85,6 +85,13 @@ pub struct HintPileHighlight {
 /// Registers the table background and pile-marker rendering.
 pub struct TablePlugin;
 
+/// Set wrapping the pile-marker painter chain (theme, hint highlights,
+/// visibility). Runs after [`crate::card_plugin::BoardVisuals`]; chrome-fx
+/// systems that touch `Visibility` on UI entities declare themselves
+/// ambiguous with it (#143).
+#[derive(bevy::ecs::schedule::SystemSet, Debug, Clone, PartialEq, Eq, Hash)]
+pub struct MarkerVisuals;
+
 impl Plugin for TablePlugin {
     fn build(&self, app: &mut App) {
         // Register WindowResized so the plugin works under MinimalPlugins in
@@ -111,6 +118,7 @@ impl Plugin for TablePlugin {
                         sync_pile_marker_visibility.after(GameMutation),
                     )
                         .chain()
+                        .in_set(MarkerVisuals)
                         .after(crate::card_plugin::BoardVisuals),
                 ),
             );