Physiology Arena

Content accuracy pass across all 14 body systems, plus new ways to study and several bug fixes: -Added Content to Learn — now contains the full education course content - Added Study Cards — a shuffled flashcard deck pulled from every quiz question and Learn chapter - Added References — the physiology textbooks this content is written and checked against - Added a How to Play guide covering hearts, XP, ranks, and all four level types - About & Terms is now a clearly labeled link on the home screen, with an expanded Terms of Service and a dedicated liability/non-affiliation section - Fixed Case Boss occasionally costing an extra heart when you tapped an already-wrong answer again - Fixed the boss health bar's number counting the wrong direction from the bar itself - Fixed the Sim Target gauges (heart rate/MAP, ventilation, GFR, acid-base) to show the full range as you adjust the sliders, instead of pinning early - Corrected wording on the oxygen-hemoglobin curve's Bohr effect, a clinical case's blood-gas values, and an exercise-physiology explanation about coronary blood flow - Bigger tap targets and added accessibility labels on navigation buttons throughout - Under-the-hood reliability fix so saved progress survives future content updates

Minor improvements and updates.