feat(players): app Players library and circular NPC tokens on scenes

Add userData players/teams, scene npcTokens with hex-inscribed sizing, session scale synced to presentation, and Playwright e2e coverage.

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

app/main/tokens/tokensStore.ts

@@ -92,11 +92,7 @@ export class TokensStore {
     return path.join(this.rootDir, relPath);
   }
 
-  async upsert(input: {
-    id?: TokenId | null;
-    name: string;
-    filePath?: string | null;
-  }): Promise<AppToken> {
+  async upsert(input: { id?: TokenId | null; name: string; filePath?: string | null }): Promise<AppToken> {
     await this.ensureLoaded();
     const name = input.name.trim();
     if (!name) throw new Error('Token name is required');
@@ -166,8 +162,7 @@ export class TokensStore {
   }): Promise<{ token: AppToken; remappedFrom: TokenId }> {
     await this.ensureLoaded();
     let buf = await fs.readFile(input.absFilePath);
-    const sha256 =
-      input.sha256 ?? crypto.createHash('sha256').update(buf).digest('hex');
+    const sha256 = input.sha256 ?? crypto.createHash('sha256').update(buf).digest('hex');
     const existingByHash = this.findBySha256(sha256);
     if (existingByHash) {
       return { token: existingByHash, remappedFrom: input.preferredId };
@@ -262,7 +257,7 @@ export class TokensStore {
         preferredId: asTokenId(t.id),
         name: typeof t.name === 'string' ? t.name : 'Token',
         absFilePath: abs,
-        sha256: typeof t.sha256 === 'string' ? t.sha256 : undefined,
+        ...(typeof t.sha256 === 'string' ? { sha256: t.sha256 } : {}),
       });
       remap.set(remappedFrom, token.id);
     }