docs/hardware/specs.md

```markdown

Hardware specs (draft)

• MCU: ESP32 (Wi-Fi + Bluetooth)
• Display: 0.96" OLED (mono)
• Controls: 6 buttons + slider potentiometer
• Audio: speaker + microphone
• LEDs: RGBW
• Storage: micro-SD
• I/O: USB-C
• Enclosure: machined aluminum