Replace USB serial/HID with Bluetooth Low Energy

Move all communication from USB to BLE. The device now advertises as
"Claude Controller" and acts as both a BLE HID keyboard (for touch
gestures) and a GATT data server (for usage updates from the daemon).

- Add NimBLE-Arduino BLE module with custom GATT service + HID keyboard
- Add third screen (Bluetooth) with connection status, MAC, reset button
- Rewrite daemon in bash using bluetoothctl/busctl for BLE GATT writes
- Add screenshot capture via LVGL snapshot over serial
- Remove TinyUSB mode — normal pio upload works again
- Update README with BLE architecture, screenshots, gesture docs

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

install.sh

@@ -11,10 +11,10 @@ echo ""
 
 # Check dependencies
 echo "[1/3] Checking dependencies..."
-for cmd in curl stty inotifywait; do
+for cmd in curl awk bluetoothctl busctl; do
     command -v "$cmd" >/dev/null || { echo "Error: $cmd is required but not installed"; exit 1; }
 done
-echo "  All dependencies found (curl, python3, stty)"
+echo "  All dependencies found"
 echo ""
 
 # Install systemd user service with resolved path
@@ -24,7 +24,7 @@ DAEMON_BIN="$SCRIPT_DIR/daemon/$SERVICE_NAME.sh"
 sed "s|DAEMON_PATH|${DAEMON_BIN}|g" "$SERVICE_FILE" > "$USER_SERVICE_DIR/$SERVICE_NAME.service"
 systemctl --user daemon-reload
 
-# Enable (service starts automatically when device is plugged in)
+# Enable service
 echo "[3/3] Enabling service..."
 systemctl --user enable "$SERVICE_NAME"
 
@@ -32,7 +32,15 @@ echo ""
 echo "=== Done! ==="
 echo ""
 echo "The daemon will now start automatically when you log in"
-echo "and the SC01 Plus is connected via USB."
+echo "and connect to the SC01 Plus over Bluetooth Low Energy."
+echo ""
+echo "First-time Bluetooth pairing:"
+echo "  1. Power on the SC01 Plus"
+echo "  2. Run: bluetoothctl scan le"
+echo "  3. Find 'Claude Controller' and note the MAC address"
+echo "  4. Run: bluetoothctl pair <MAC>"
+echo "  5. Run: bluetoothctl trust <MAC>"
+echo "  6. Start the daemon: systemctl --user start $SERVICE_NAME"
 echo ""
 echo "Useful commands:"
 echo "  systemctl --user status $SERVICE_NAME    # check status"
@@ -40,8 +48,3 @@ echo "  journalctl --user -u $SERVICE_NAME -f    # view logs"
 echo "  systemctl --user restart $SERVICE_NAME   # restart"
 echo "  systemctl --user stop $SERVICE_NAME      # stop"
 echo ""
-echo "To uninstall:"
-echo "  systemctl --user stop $SERVICE_NAME"
-echo "  systemctl --user disable $SERVICE_NAME"
-echo "  rm $USER_SERVICE_DIR/$SERVICE_NAME.service"
-echo "  systemctl --user daemon-reload"