Bundled esptool.py runs via sys.executable, which may be a Python
that lacks pyserial (e.g. miniconda). Reorder find_esptool() to
prefer pip-installed esptool first (handles its own deps), and
only fall back to bundled/PlatformIO scripts if pyserial is
importable. Give a clear error message if neither works.
- flash.py: standalone flash utility with serial port listing, merge-bin,
GitHub Releases download, and esptool flash support
- Display.h: hide LAN row when Local TCP disabled, show local TCP port
instead of backbone port
- README.md: comprehensive documentation — Quick Start with 3 flash options,
OLED display layout, interface modes, routing customizations, path table
fix, interface name uniqueness, hardware rationale (PSRAM/flash)
- Release/boot_app0.bin: bundled for flash.py standalone use
- .gitignore: exclude merged firmware binary build artifact
