Initial project: ESP32-S3 e-ink photo frame with web UI

ESP32-S3 firmware (PlatformIO) that fetches JPEGs from a photo server,
decodes on-device with PSRAM, Floyd-Steinberg dithers to the Spectra 6
6-color palette, and displays on a 7.3" GDEP073E01 e-paper panel.
Deep sleeps 1 hour between updates.

Photo server (Python/Flask) with web UI for photo management, Traefik
routing at photos.haunt.house with Google OAuth, and Home Assistant
REST sensor integration.

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

firmware/platformio.ini

@@ -0,0 +1,17 @@
+[env:esp32s3]
+platform = espressif32
+board = esp32-s3-devkitc-1
+framework = arduino
+monitor_speed = 115200
+upload_speed = 921600
+
+board_build.arduino.memory_type = qio_opi
+board_build.psram = enabled
+
+build_flags =
+    -DBOARD_HAS_PSRAM
+    -DARDUINO_USB_CDC_ON_BOOT=1
+
+lib_deps =
+    zinggjm/GxEPD2@^1.6.0
+    bitbank2/JPEGDEC@^1.4.2