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/renderer/editor/help/helpLinkify.ts

@@ -9,6 +9,7 @@ export const HELP_SECTION_LINK_ALIASES: Partial<Record<HelpSectionId, readonly s
   presentation: ['Презентация', 'Presentation'],
   grid: ['Сетка', 'Grid'],
   controlPanel: ['Пульт'],
+  players: ['Игроки', 'Players'],
 };
 
 export type HelpLinkCatalogEntry = {