Remove dead code (#11082)

Removed:
- MessageStore::addFromPacket and addFromString, superseded by
  tryAddFromPacket
- GeoCoord rangeRadiansToMeters, distanceTo, bearingTo
- Router::rawSend, declared virtual with no override and no caller
- ContentHandler handleHotspot, handleFs, handleAdminSettings,
  handleAdminSettingsApply, handleDeleteFsContent and their commented
  route registrations, plus the now unreachable htmlDeleteDir and the
  handleUpdateFs declaration that had no definition
- ContentHelper replaceAll
- OnScreenKeyboardModule popup chain: showPopup, clearPopup, drawPopup,
  drawPopupOverlay and their state, unreachable since the frame based UI
  was replaced by baseUI
- DebugRenderer drawDebugInfoTrampoline, drawDebugInfoSettingsTrampoline
  and the orphaned drawFrameSettings
- NodeListRenderer calculateMaxScroll, drawColumns and a stale extern
  haveGlyphs declaration with no definition
- UIRenderer::haveGlyphs, Screen::blink,
  NotificationRenderer::showKeyboardMessagePopupWithTitle,
  VirtualKeyboard::getInputText
- InkHUD touchNavLeft, touchNavRight, Applet::getActiveNodeCount,
  ThreadedMessageApplet::saveMessagesToFlash
- TwoButton::setHandlerUp, TwoButtonExtended setHandlerUp,
  setJoystickDownHandlers, setJoystickUpHandlers
- CannedMessageModule LaunchRepeatDestination, isCharInputAllowed,
  hasMessages
- TrafficManagementModule resetStats, recordRouterHopPreserved,
  saturatingIncrement
- UnitConversions::MetersPerSecondToMilesPerHour
- EncryptedStorage getSessionRemainingSeconds
- BMI270Sensor::writeRegisters, GPS::hasFlow, FSCommon copyFile,
  SerialConsole consolePrintf, buzz playLongPressLeadUp,
  memGet displayPercentHeapFree

src/graphics/draw/NotificationRenderer.cpp

@@ -207,8 +207,6 @@ void NotificationRenderer::resetBanner()
     alertBannerMessage[0] = '\0';
     current_notification_type = notificationTypeEnum::none;
 
-    OnScreenKeyboardModule::instance().clearPopup();
-
     inEvent.inputEvent = INPUT_BROKER_NONE;
     inEvent.kbchar = 0;
     curSelected = 0;
@@ -1187,9 +1185,6 @@ void NotificationRenderer::drawTextInput(OLEDDisplay *display, OLEDDisplayUiStat
         display->setColor(WHITE);
         // Draw the virtual keyboard
         virtualKeyboard->draw(display, 0, 0);
-
-        // Draw transient popup overlay (if any) managed by OnScreenKeyboardModule
-        OnScreenKeyboardModule::instance().drawPopupOverlay(display);
     } else {
         // If virtualKeyboard is null, reset the banner to avoid getting stuck
         LOG_INFO("Virtual keyboard is null - resetting banner");
@@ -1202,12 +1197,5 @@ bool NotificationRenderer::isOverlayBannerShowing()
     return strlen(alertBannerMessage) > 0 && (alertBannerUntil == 0 || millis() <= alertBannerUntil);
 }
 
-void NotificationRenderer::showKeyboardMessagePopupWithTitle(const char *title, const char *content, uint32_t durationMs)
-{
-    if (!title || !content || current_notification_type != notificationTypeEnum::text_input)
-        return;
-    OnScreenKeyboardModule::instance().showPopup(title, content, durationMs);
-}
-
 } // namespace graphics
 #endif