Add CYD host PC info panel with serial SI protocol and LVGL bars.

ESP32 shows CPU/GPU/RAM/disk from host/send_sysinfo.ps1 over USB; firmware packages for 2.8 and 3.5 included.

Co-authored-by: Cursor <cursoragent@cursor.com>

platformio.ini

@@ -0,0 +1,109 @@
+; CYD — host PC / server info panel (USB serial feed + LVGL)
+[env:cyd]
+platform = espressif32
+board = esp32dev
+framework = arduino
+monitor_speed = 460800
+upload_speed = 460800
+board_build.partitions = default.csv
+
+lib_deps =
+  bodmer/TFT_eSPI@^2.5.43
+  lvgl/lvgl@9.2.2
+
+build_flags =
+  -DCORE_DEBUG_LEVEL=0
+  -DUSER_SETUP_LOADED=1
+  -DILI9341_2_DRIVER=1
+  -DTFT_WIDTH=240
+  -DTFT_HEIGHT=320
+  -DTFT_MISO=12
+  -DTFT_MOSI=13
+  -DTFT_SCLK=14
+  -DTFT_CS=15
+  -DTFT_DC=2
+  -DTFT_RST=-1
+  -DTFT_BL=21
+  -DTFT_BACKLIGHT_ON=HIGH
+  -DTOUCH_CS=-1
+  -DLOAD_GLCD=1
+  -DLOAD_FONT2=1
+  -DLOAD_FONT4=1
+  -DLOAD_FONT6=1
+  -DLOAD_FONT7=1
+  -DLOAD_FONT8=1
+  -DLOAD_GFXFF=1
+  -DSMOOTH_FONT=1
+  -DSPI_FREQUENCY=40000000
+  -DSPI_READ_FREQUENCY=20000000
+  -DLV_CONF_SKIP
+  -DLV_COLOR_DEPTH=16
+  -DLV_MEM_SIZE=49152
+  -DLV_FONT_MONTSERRAT_14=1
+  -DLV_FONT_MONTSERRAT_16=1
+  -DLV_FONT_MONTSERRAT_18=1
+  -DLV_FONT_MONTSERRAT_20=1
+  -DLV_USE_TFT_ESPI=1
+  -DLV_USE_FLEX=1
+  -DLV_USE_LABEL=1
+  -DLV_USE_BAR=1
+  -I${PROJECT_DIR}/include
+
+extra_scripts = pre:copy_lv_conf.py
+
+; Optional 3.5" CYD ESP32-3248S035C (ST7796 + GT911 capacitive). Default [env:cyd].
+; Build: pio run -e cyd_35r
+; Keep TOUCH_CS=-1 — GPIO33 is GT911 SDA, not resistive touch CS.
+; TFT_BL=GPIO27 (not 21 — 21 is GT911 INT). See ../CYD_PROJECT_GUIDE.md
+[env:cyd_35r]
+platform = espressif32
+board = esp32dev
+framework = arduino
+monitor_speed = 460800
+upload_speed = 460800
+board_build.partitions = default.csv
+lib_deps =
+  bodmer/TFT_eSPI@^2.5.43
+  lvgl/lvgl@9.2.2
+extra_scripts = pre:copy_lv_conf.py
+build_flags =
+  -DCORE_DEBUG_LEVEL=0
+  -DUSER_SETUP_LOADED=1
+  -DST7796_DRIVER=1
+  -DTFT_WIDTH=320
+  -DTFT_HEIGHT=480
+  -DTFT_MISO=12
+  -DTFT_MOSI=13
+  -DTFT_SCLK=14
+  -DTFT_CS=15
+  -DTFT_DC=2
+  -DTFT_RST=-1
+  -DTFT_BL=27
+  -DTFT_BACKLIGHT_ON=HIGH
+  -DTOUCH_CS=-1
+  -DLOAD_GLCD=1
+  -DLOAD_FONT2=1
+  -DLOAD_FONT4=1
+  -DLOAD_FONT6=1
+  -DLOAD_FONT7=1
+  -DLOAD_FONT8=1
+  -DLOAD_GFXFF=1
+  -DSMOOTH_FONT=1
+  -DSPI_FREQUENCY=40000000
+  -DSPI_READ_FREQUENCY=20000000
+  -DUSE_HSPI_PORT
+  -DSUPPORT_TRANSACTIONS
+  -DTFT_RGB_ORDER=TFT_BGR
+  -DCYD_BOARD_3248S035=1
+  -DLV_CONF_SKIP
+  -DLV_COLOR_DEPTH=16
+  -DLV_MEM_SIZE=32768
+  -DLV_FONT_MONTSERRAT_14=1
+  -DLV_FONT_MONTSERRAT_16=1
+  -DLV_FONT_MONTSERRAT_18=1
+  -DLV_FONT_MONTSERRAT_20=1
+  -DLV_USE_TFT_ESPI=1
+  -DLV_USE_FLEX=1
+  -DLV_USE_LABEL=1
+  -DLV_USE_BAR=1
+  -I${PROJECT_DIR}/include