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>

firmware/platformio.ini

@@ -0,0 +1,35 @@
+[env:sc01plus]
+platform = espressif32
+board = esp32-s3-devkitc-1
+framework = arduino
+upload_speed = 921600
+monitor_speed = 115200
+
+build_flags =
+    -DARDUINO_USB_CDC_ON_BOOT=1
+    -DBOARD_HAS_PSRAM
+    ; LVGL config via build flags
+    -DLV_CONF_SKIP
+    -DLV_COLOR_DEPTH=16
+    -DLV_USE_LOG=0
+    -DLV_FONT_MONTSERRAT_12=1
+    -DLV_FONT_MONTSERRAT_14=1
+    -DLV_FONT_MONTSERRAT_16=1
+    -DLV_FONT_MONTSERRAT_20=1
+    -DLV_FONT_MONTSERRAT_24=1
+    -DLV_FONT_MONTSERRAT_28=1
+    -DLV_USE_BAR=1
+    -DLV_USE_LABEL=1
+    -DLV_USE_ARC=1
+    -DLV_USE_BTN=1
+    -DLV_USE_LINE=1
+    -DLV_USE_OBJ=1
+    -DLV_USE_IMG=1
+    -DLV_USE_IMAGE=1
+    -DLV_USE_ANIMIMG=0
+    -DLV_TICK_CUSTOM=1
+
+lib_deps =
+    lovyan03/LovyanGFX@^1.1.16
+    lvgl/lvgl@^9.2.0
+    bblanchon/ArduinoJson@^7.0.0