Add systemd service to bridge the Pi Unix socket over SSH, make fan.py fall back to the TCP tunnel, and rename the module from `custom/fan` to `custom/cooling_pad`. Update README install steps and connection details.
Includes a Python script, Waybar config snippet, and README with install instructions, usage, and optional CSS styling.
Initial implementation of a USB-gadget-linked cooling controller: - fan_controller.c: PWM PID control, tach reading, TCP temp receiver, Unix socket IPC, safe-mode fallback, CSV logging via pigpio. - temp_sender.py: laptop-side lm-sensors/thermal_zone temp sender with auto-reconnect. - FanController.qml: Quickshell floating widget for monitoring and setpoint/manual duty control over the Unix socket.
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