v1.13.0.52

• OLED font upgrade (U8g2) - Migrated SH1106 OLED driver from Adafruit GFX to U8g2 library for native UTF-8 rendering. All 20+ European languages now display proper diacritical marks (Polish, Czech, Slovak, German, French, Spanish, Italian, Portuguese, Romanian, Turkish, Hungarian, Croatian, Scandinavian, and more).
• Expanded character variants - Long-press variant popup now includes full accent sets for all supported languages (e.g. a → aáàâãäåąă, e → eéèêëęěė).
• Native UTF-8 popup rendering - Variant popup uses native font rendering on U8g2 displays instead of pixel-drawn accents, showing crisp diacritical marks at any size.
• Keyboard popup controls fixed - Variant popup now reacts correctly to joystick navigation in compose text input.
• Fix: Settings persistence (Wio BLE) - Reduced OFFLINE_QUEUE_SIZE from 256 to 64 in Wio BLE companion build to free heap (~33KB) and avoid flash write failures under low-memory conditions.
• System: Free heap display - System menu now shows live free heap in KB and percentage.
• Tools: Removed Compass - Compass (GPS) removed from Tools menu.
• Favorites in Contacts now change only on Enter (no accidental Left/Right toggles).
• T9 numeric mode fixed: 0 now inserts 0; symbol mode keeps working DEL.
• Wio now has Sensors page enabled in Home (Sensors -> Press enter -> data list).
• Sensors view is standardized (proper header/list layout) and more stable at startup.
• Sensors screen can show: GPS, voltage/current/power, temperature/humidity, pressure/altitude, distance (depends on connected hardware).
• Radio settings line now keeps BW visible on narrow displays.
• Contact auto-sort by location is more stable (less risk of invalid distance UI issues).