feat: кубики/таймер/кисть/спонсоры и задел игровых систем

Показ анимации кубиков игрокам, закрытие оверлеев с окнами, ручной ввод количества, меньший радиус кисти, блок спонсоров в «О программе»; плюс черновик game systems / character sheet.

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

app/main/players/playersStore.ts

@@ -188,6 +188,8 @@ export class PlayersStore {
         input.imageScale ?? existing?.imageScale ?? DEFAULT_PLAYER_IMAGE_SCALE,
       ),
     };
+    if (existing?.systemId !== undefined) player.systemId = existing.systemId;
+    if (existing?.characterSheet !== undefined) player.characterSheet = existing.characterSheet;
 
     if (existing) {
       this.players = this.players.map((p) => (p.id === player.id ? player : p));
@@ -287,6 +289,20 @@ export class PlayersStore {
     return this.getById(playerId);
   }
 
+  /** Clears systemId / characterSheet on players bound to a removed game system. */
+  async clearSystemBindings(systemId: string): Promise<number> {
+    await this.ensureLoaded();
+    let changed = 0;
+    this.players = this.players.map((p) => {
+      const hit = p.systemId === systemId || p.characterSheet?.systemId === systemId;
+      if (!hit) return p;
+      changed += 1;
+      return { ...p, systemId: null, characterSheet: null };
+    });
+    if (changed > 0) await this.persist();
+    return changed;
+  }
+
   private async persist(): Promise<void> {
     await fs.mkdir(this.rootDir, { recursive: true });
     const payload: PlayersManifest = { players: this.players, teams: this.teams };