Initial commit: Claude Usage Tracker for Panlee SC01 Plus

Physical desk monitor that displays Claude Code usage limits (5-hour session
and 7-day weekly utilization) on an ESP32-S3 touchscreen via USB serial.

Firmware: LVGL 9 dashboard with LovyanGFX on SC01 Plus, Anthropic brand
colors and custom fonts (Tiempos, Styrene B, DejaVu Sans Mono), Claude
spinner animation with rotating status words.

Daemon: Pure bash script that reads the Claude Code OAuth token, makes a
minimal Haiku API call, extracts usage from rate-limit response headers,
and sends JSON to the ESP32 over serial. Uses inotifywait for instant
USB plug/unplug detection.

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

install.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+SERVICE_NAME="claude-usage-daemon"
+SERVICE_FILE="$SCRIPT_DIR/daemon/$SERVICE_NAME.service"
+USER_SERVICE_DIR="$HOME/.config/systemd/user"
+
+echo "=== Claude Usage Tracker - Install ==="
+echo ""
+
+# Check dependencies
+echo "[1/3] Checking dependencies..."
+for cmd in curl stty inotifywait; do
+    command -v "$cmd" >/dev/null || { echo "Error: $cmd is required but not installed"; exit 1; }
+done
+echo "  All dependencies found (curl, python3, stty)"
+echo ""
+
+# Install systemd user service with resolved path
+echo "[2/3] Installing systemd user service..."
+mkdir -p "$USER_SERVICE_DIR"
+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)
+echo "[3/3] Enabling service..."
+systemctl --user enable "$SERVICE_NAME"
+
+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 ""
+echo "Useful commands:"
+echo "  systemctl --user status $SERVICE_NAME    # check status"
+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"