feat(rlcd): invert toggle, mono threshold, font bump, B/W luminance

- RLCD device.properties: DefaultDark (focus UI visible), fontSize 18
  (+28% vs 14: small 10->14, default 14->18, large 18->24, icons 16->20/36->48)
- ST7305 driver: honor invertColor config (was ignored), call
  esp_lcd_panel_invert_color after init
- DisplayDevice: add supportsInvertColor + set/get, and
  supportsMonochromeThreshold/set/get (ST7305 only)
- EspLcdDisplay: implement invert via panelHandle, and mono threshold via
  global g_mono_threshold shared with esp_lvgl_port
- DisplaySettings: new fields invertColor (default true to preserve current
  inverted look) and monochromeThreshold (default 60 best for DefaultDark per
  user testing, range 20-230)
- Lvgl.cpp: apply invert + threshold at boot from settings
- Display app: add Invert colors switch (if supportsInvertColor) + Mono
  threshold slider with live preview and persistence
- esp_lvgl_port_disp.c (components override for hash mismatch): fix B/W
  conversion
  BEFORE: blue >16 only -> crushed colors, no gray handling
  AFTER: proper luminance Y=0.299R+0.587G+0.114B with adjustable threshold
         (default 60), no Bayer dithering dots. Crisp text on reflective
- Launcher/button/list wrappers reverted to stock DefaultDark (no white
  focus hacks) per user request - focus UI now uses default outline which
  survives luminance threshold

Verified on waveshare-esp32-s3-rlcd /dev/cu.usbmodem1101:
- Build 2877200 bytes, flash hash verified
- Invert toggle works, threshold slider live (60 best per test)
- Font bump visible, focus UI visible for button navigation
- No dithering dots

Docs: LVGL mono https://docs.lvgl.io/9.2/porting/display.html#monochrome-displays
Themes: https://docs.lvgl.io/9.2/details/common-widget-features/styles/themes.html

Co-authored-by: Hermes Agent <hermes@noreply>

Tactility/Source/app/launcher/Launcher.cpp

@@ -49,11 +49,6 @@ class LauncherApp final : public App {
         lv_obj_set_style_shadow_width(apps_button, 0, LV_STATE_DEFAULT);
         lv_obj_set_style_bg_opa(apps_button, 0, LV_STATE_DEFAULT);
 
-        // Add a high-contrast focus outline for monochrome / RLCD screens
-        lv_obj_set_style_outline_width(apps_button, 2, LV_STATE_FOCUSED);
-        lv_obj_set_style_outline_pad(apps_button, 2, LV_STATE_FOCUSED);
-        lv_obj_set_style_outline_color(apps_button, lv_theme_get_color_primary(apps_button), LV_STATE_FOCUSED);
-
         auto* default_group = lv_group_get_default();
         if (default_group) {
             lv_group_add_obj(default_group, apps_button);
@@ -223,11 +218,6 @@ public:
             lv_obj_set_style_shadow_width(power_button, 0, LV_STATE_DEFAULT);
             lv_obj_set_style_bg_opa(power_button, 0, LV_PART_MAIN);
 
-            // Add high-contrast focus outline for monochrome / RLCD screens
-            lv_obj_set_style_outline_width(power_button, 2, LV_STATE_FOCUSED);
-            lv_obj_set_style_outline_pad(power_button, 2, LV_STATE_FOCUSED);
-            lv_obj_set_style_outline_color(power_button, lv_theme_get_color_primary(power_button), LV_STATE_FOCUSED);
-
             auto* default_group = lv_group_get_default();
             if (default_group) {
                 lv_group_add_obj(default_group, power_button);