feat: save games and edit scene darkness

Persist show state to local saves; author map darkness in scene editor with bake-to-scene and help updates.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/main/players/sceneNpcTokensSessionStore.ts

@@ -310,4 +310,14 @@ export class SceneNpcTokensSessionStore {
       }
     }
   }
+
+  load(next: Omit<SceneNpcTokensSessionState, 'revision'>): SceneNpcTokensSessionState {
+    this.state = {
+      revision: this.state.revision + 1,
+      byPlacementId: { ...next.byPlacementId },
+      scale: clampNpcTokenSessionScale(next.scale),
+      spawned: { ...next.spawned },
+    };
+    return this.state;
+  }
 }

app/main/players/scenePlayerTokensSessionStore.ts

@@ -179,4 +179,14 @@ export class ScenePlayerTokensSessionStore {
       }
     }
   }
+
+  load(next: Omit<ScenePlayerTokensSessionState, 'revision'>): ScenePlayerTokensSessionState {
+    this.state = {
+      revision: this.state.revision + 1,
+      selectedPlayerIds: [...next.selectedPlayerIds],
+      visible: next.visible,
+      byPlayerId: { ...next.byPlayerId },
+    };
+    return this.state;
+  }
 }