Both devices ship with a Wi-Fi Standby timer that turns off the AP
after ~10 minutes with no clients, blocking remote access to Rayhunter
until a power cycle. Previous attempt (this PR's earlier commits) added
a Rayhunter config toggle to flip gWlanAutoShutdown in WCNSS_qcom_cfg.ini,
but the same setting is already exposed in each device's native admin UI
under Settings -> Sleep -> Wi-Fi Standby, so a code change is not needed.
Replace the config toggle with:
- Device-page walkthroughs with screenshots of each native UI setting
- FAQ entry for "can't reach the web UI after leaving it alone"
- Post-install hint from the tmobile/wingtech installers pointing at
the docs and the setting location