feat(touch): add press/release detection with touch-down tracking

boards/esp32-32e-4/DisplayDriverTFT.cpp

@@ -173,11 +173,32 @@ TouchEvent DisplayDriverTFT::readTouch() {
     TouchEvent evt;
     uint16_t tx, ty;
     uint8_t touched = _tft.getTouch(&tx, &ty, 100);
-    if(touched) {
+
+    // Detect transitions (press/release)
+    if(touched && !_touchWasPressed) {
+        // Press transition: finger just touched down
         evt.pressed = true;
+        _touchDownX = tx;
+        _touchDownY = ty;
+        evt.downX = _touchDownX;
+        evt.downY = _touchDownY;
+    } else if(!touched && _touchWasPressed) {
+        // Release transition: finger just lifted
+        evt.released = true;
+        evt.downX = _touchDownX;
+        evt.downY = _touchDownY;
+    }
+
+    // Current position if still touched
+    if(touched) {
         evt.x = tx;
         evt.y = ty;
+        evt.downX = _touchDownX;
+        evt.downY = _touchDownY;
     }
+
+    // Track previous state for next call
+    _touchWasPressed = touched;
     return evt;
 }
 

boards/esp32-32e-4/DisplayDriverTFT.h

@@ -32,4 +32,9 @@ private:
     ScreenID _lastScreen = ScreenID::BOOT;
     BootStage _lastBootStage = BootStage::SPLASH;
     bool _needsRedraw = true;
+
+    // Touch tracking for press/release detection
+    bool _touchWasPressed = false;
+    int _touchDownX = -1;
+    int _touchDownY = -1;
 };

boards/esp32-s3-lcd-43/DisplayDriverGFX.cpp

@@ -68,16 +68,36 @@ TouchEvent DisplayDriverGFX::readTouch() {
     int32_t x, y;
     bool pressed = _gfx->getTouch(&x, &y);
 
-    // Only report NEW touches (debounce - ignore held touches)
-    evt.pressed = pressed && !_lastTouch.pressed;
+    // Detect transitions (press/release)
+    if(pressed && !_lastTouch.pressed) {
+        // Press transition: finger just touched down
+        evt.pressed = true;
+        evt.downX = static_cast<int>(x);
+        evt.downY = static_cast<int>(y);
+        _lastTouch.downX = evt.downX;
+        _lastTouch.downY = evt.downY;
+    } else if(!pressed && _lastTouch.pressed) {
+        // Release transition: finger just lifted
+        evt.released = true;
+        evt.downX = _lastTouch.downX;
+        evt.downY = _lastTouch.downY;
+    }
 
+    // Current position if still touched
     if(pressed) {
         evt.x = static_cast<int>(x);
         evt.y = static_cast<int>(y);
+        evt.downX = _lastTouch.downX;
+        evt.downY = _lastTouch.downY;
         _pressStartMs = millis();
     }
 
+    // Track previous state
     _lastTouch.pressed = pressed;
+    if(pressed) {
+        _lastTouch.x = evt.x;
+        _lastTouch.y = evt.y;
+    }
     return evt;
 }
 

boards/esp32-s3-lcd-43/DisplayDriverGFX.h

@@ -28,7 +28,7 @@ private:
     void drawDashboard(const ScreenState& state);
 
     // Touch handling
-    TouchEvent _lastTouch = { false, 0, 0 };
+    TouchEvent _lastTouch = { false, false, 0, 0, -1, -1 };
     unsigned long _pressStartMs = 0;
     bool _isHolding = false;