fix: Blockly media serving, tablet puppet fit, idle blink polish

feat: RealRobotAdapter, multiplex fan-out, full embed wiring

feat: emotions-library loader, sound effects, WAV pipeline

feat: block interpreter with Run/Stop, logic branches, and step budget

feat: Blockly workspace, kid block set, desktop UI shell, autosave

feat: SVG puppet, VirtualRobotAdapter, pose tables, test harness

feat: scaffold Reachy Mini JS-app contract shell (Vite+TS, SDK 1.8.4, Blockly)