Replace short-circuit boolean evaluation of putString return values with separate size_t variables so both writes always execute regardless of whether the first succeeds. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Add config.h/config.cpp for DeviceConfig NVS persistence using Arduino Preferences library. Add minimal main.cpp stub. Fix partition table overlap (nvs 0x6000→0x5000, otadata 0xf000→0xe000) so firmware builds. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>