Add compile-time WiFi hard-off mode (WLED_FORCE_WIFI_OFF)

[Stargazer2026]

Motivation

• Provide a compile-time "flight mode" option to completely disable the WiFi radio (WIFI_OFF) so builds for Ethernet-only or radio-restricted environments do not start STA or AP interfaces.
• This saves 5kb for the resulting firmware.bin binary.

Description

• Add a commented compile-time flag WLED_FORCE_WIFI_OFF to wled.h and document it in my_config_sample.h so users can enable it from my_config.h or build flags.
• In wled.cpp, change startup networking to call WiFi.mode(WIFI_OFF) when WLED_FORCE_WIFI_OFF is defined instead of starting STA scanning and findWiFi(true).
• Short-circuit initAP() to immediately return when WLED_FORCE_WIFI_OFF is defined so no softAP is created.
• Make initConnection() early-exit when WLED_FORCE_WIFI_OFF is defined after calling WiFi.disconnect(true) and forcing WiFi.mode(WIFI_OFF), and add debug prints to indicate the forced-off state.

Testing

• Ran automated file-modification checks (pattern replacements and nl/rg inspections) to verify the flag and conditional blocks were inserted into wled.h, my_config_sample.h, and wled.cpp, and those checks succeeded.
• Build succeeded

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Initialize reconnect state before WiFi-off early return

When WLED_FORCE_WIFI_OFF is enabled, initConnection() returns in this block before lastReconnectAttempt is set (currently done later in the function). handleConnection() gates its first path on lastReconnectAttempt == 0, so this creates a perpetual "initial connect" loop that returns early on every iteration, repeatedly resetting interfacesInited and preventing initInterfaces() (and therefore server.begin()) from running in Ethernet-only deployments. This makes the new hard-off mode effectively break network availability instead of only disabling WiFi radio usage.

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