esp_new_jpeg scales inside the decoder and is 5-6x faster than tjpgd on
the S3 (1280x800 frame: ~100 ms instead of ~600 ms), so MJPEG streams
now play at a few fps. insecam double-encodes some URLs (&); the
entity decoder now loops until stable.
ESP-IDF 5.5 + LVGL 9 firmware that plays random public cameras from
insecam.org on the T-Embed's 320x170 screen, live MJPEG where available,
a new camera every 20 seconds. Knob steps through cameras, LED ring shows
the countdown. Auto-detects the original vs CC1101 board, reuses Wi-Fi
credentials from NVS and falls back to a captive-portal setup hotspot.