Refactor image rendering and add Bluetooth setting

- Added logic to render images only in BW mode in Page.cpp.
- Implemented getRenderMode() in GfxRenderer.h.
- Increased SETTINGS_COUNT and added bluetoothEnabled field in CrossPointSettings.
- Updated saveToFile and loadFromFile methods to handle the new Bluetooth setting.
- Added Bluetooth toggle in SettingsActivity.

src/activities/network/CrossPointWebServerActivity.cpp

@@ -8,9 +8,11 @@
 
 #include <cstddef>
 
+#include "CrossPointSettings.h"
 #include "MappedInputManager.h"
 #include "NetworkModeSelectionActivity.h"
 #include "WifiSelectionActivity.h"
+#include "activities/util/FullScreenMessageActivity.h"
 #include "fontIds.h"
 
 namespace {
@@ -128,6 +130,15 @@ void CrossPointWebServerActivity::onNetworkModeSelected(const NetworkMode mode)
   Serial.printf("[%lu] [WEBACT] Network mode selected: %s\n", millis(),
                 mode == NetworkMode::JOIN_NETWORK ? "Join Network" : "Create Hotspot");
 
+  // Check for WiFi/BLE mutual exclusion
+  if (SETTINGS.bluetoothEnabled) {
+    Serial.printf("[%lu] [WEBACT] ERROR: Cannot start WiFi while Bluetooth is enabled\n", millis());
+    exitActivity();
+    enterNewActivity(new FullScreenMessageActivity(
+        renderer, mappedInput, "Disable Bluetooth first\n\nGo to Settings > Bluetooth"));
+    return;
+  }
+
   networkMode = mode;
   isApMode = (mode == NetworkMode::CREATE_HOTSPOT);
 

src/activities/settings/SettingsActivity.cpp

@@ -9,7 +9,7 @@
 
 // Define the static settings list
 namespace {
-constexpr int settingsCount = 11;
+constexpr int settingsCount = 12;
 const SettingInfo settingsList[settingsCount] = {
     // Should match with SLEEP_SCREEN_MODE
     {"Sleep Screen", SettingType::ENUM, &CrossPointSettings::sleepScreen, {"Dark", "Light", "Custom", "Cover"}},
@@ -34,6 +34,7 @@ const SettingInfo settingsList[settingsCount] = {
      {"Bookerly", "Noto Sans", "Open Dyslexic"}},
     {"Reader Font Size", SettingType::ENUM, &CrossPointSettings::fontSize, {"Small", "Medium", "Large", "X Large"}},
     {"Reader Line Spacing", SettingType::ENUM, &CrossPointSettings::lineSpacing, {"Tight", "Normal", "Wide"}},
+    {"Bluetooth", SettingType::TOGGLE, &CrossPointSettings::bluetoothEnabled, {}},
     {"Check for updates", SettingType::ACTION, nullptr, {}},
 };
 }  // namespace