Extends Features.h with preprocessor flags (FEAT_BRIGHTNESS_SETTING,
FEAT_CLOCK_SECONDS_SETTING, FEAT_DISPLAY_ROTATION_SETTING,
FEAT_JOYSTICK_ROTATION_SETTING, FEAT_FULL_REFRESH_SETTING) since
constexpr can't gate enum members or class fields. SettingsScreen.h
now uses #if FEAT_X instead of #if defined(EINK_DISPLAY_MODEL) — grep
on the feature name finds the toggle and every use site, and the
condition names *what* the gate controls.
Driver headers (DisplayDriver.h, GxEPDDisplay.h) keep raw
EINK_DISPLAY_MODEL — they're below the companion_radio layer and the
ifdef there gates on the build's panel type, not a UI feature.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Five sites in UITask.cpp + MyMesh.cpp branched on EINK_DISPLAY_MODEL
purely for runtime-shape decisions (blink rate, default pref values,
refresh intervals). Replace with a constexpr Features namespace:
IS_EINK, BLINK_INDICATORS, CLOCK_HIDE_SECONDS_DEFAULT, HOME_REFRESH_MS,
LOCKSCREEN_REFRESH_MS. Compiler dead-branch-eliminates so cost is
identical to the preprocessor branch, but the code stays reachable to
tooling and the policy lives in one file.
SettingsScreen and driver headers still need real #ifdef — they
condition enum members and class field layouts.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
