feat(Display): Improve touch handling and visual feedback

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

@@ -197,9 +197,12 @@ void DisplayDriverTFT::drawAlert(const ScreenState& st) {
     uint32_t elapsed = millis() - st.alertStartMs;
     bool brightPhase = (elapsed / 2000) % 2 == 0;
 
-    // Only redraw when phase changes (timer-based, not every frame)
-    if(brightPhase != _lastAlertPhase) {
+    // Redraw when phase changes OR when touch was released (to clear fill)
+    bool needsRedraw = (brightPhase != _lastAlertPhase) || _alertNeedsRedraw;
+
+    if(needsRedraw) {
         _lastAlertPhase = brightPhase;
+        _alertNeedsRedraw = false; // clear the flag
         uint16_t bg = brightPhase ? TFT_RED : _tft.color565(180, 0, 0);
 
         _tft.fillScreen(bg);
@@ -218,7 +221,7 @@ void DisplayDriverTFT::drawAlert(const ScreenState& st) {
         _tft.print("Hold to silence...");
     }
 
-    // Progressive fill hint - only redraw when touch state changes
+    // Progressive fill hint - while touch is held
     if(_alertTouchDown) {
         uint32_t touchElapsed = millis() - _alertTouchStartMs;
         float progress = (float)touchElapsed / (float)ALERT_FILL_DURATION_MS;
@@ -374,6 +377,12 @@ TouchEvent DisplayDriverTFT::readTouch() {
     uint16_t tx, ty;
     uint8_t touched = _tft.getTouch(&tx, &ty, 100);
 
+    // Debug: log touch state changes
+    if(touched != _touchWasPressed) {
+        Serial.printf("[TOUCH] raw touched=%d wasPressed=%d (x=%d,y=%d)\n", touched,
+            _touchWasPressed, tx, ty);
+    }
+
     // Detect transitions (press/release)
     if(touched && !_touchWasPressed) {
         // Press transition: finger just touched down
@@ -406,6 +415,7 @@ TouchEvent DisplayDriverTFT::readTouch() {
         _alertTouchStartMs = millis();
     } else if(evt.released) {
         _alertTouchDown = false;
+        _alertNeedsRedraw = true; // force redraw to clear fill
     }
 
     return evt;
@@ -418,11 +428,10 @@ void DisplayDriverTFT::transformTouch(int* x, int* y) {
     *y = temp;
 }
 
-HoldState DisplayDriverTFT::updateHold(unsigned long holdMs) {
+HoldState DisplayDriverTFT::updateHold(const TouchEvent& evt, unsigned long holdMs) {
     HoldState h;
-    TouchEvent t = readTouch();
 
-    if(t.pressed) {
+    if(evt.pressed) {
         if(!_holdActive) {
             _holdActive = true;
             _holdStartMs = millis();

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

@@ -11,7 +11,7 @@ public:
     void setBacklight(bool on) override;
     void render(const ScreenState& state) override;
     TouchEvent readTouch() override;
-    HoldState updateHold(unsigned long holdMs) override;
+    HoldState updateHold(const TouchEvent& evt, unsigned long holdMs) override;
     int width() override {
         // Use TFT_eSPI's dimensions after rotation - it's more reliable
         return _tft.width();
@@ -43,6 +43,7 @@ private:
 
     // Touch hint for alert - progressive fill from bottom
     bool _alertTouchDown = false;
+    bool _alertNeedsRedraw = false; // force redraw after touch release
     uint32_t _alertTouchStartMs = 0;
     bool _lastAlertPhase = false; // tracks bright/dark phase for 2-color alert
     static constexpr uint32_t ALERT_FILL_DURATION_MS = 3000;

boards/esp32-32e/DisplayDriverTFT.cpp

@@ -298,11 +298,10 @@ int DisplayDriverTFT::dashboardTouch(int x, int y) {
     return row * 2 + col; // 0, 1, 2, or 3
 }
 
-HoldState DisplayDriverTFT::updateHold(unsigned long holdMs) {
+HoldState DisplayDriverTFT::updateHold(const TouchEvent& evt, unsigned long holdMs) {
     HoldState h;
-    TouchEvent t = readTouch();
 
-    if(t.pressed) {
+    if(evt.pressed) {
         if(!_holdActive) {
             _holdActive = true;
             _holdStartMs = millis();

boards/esp32-32e/DisplayDriverTFT.h

@@ -12,7 +12,7 @@ public:
     void render(const ScreenState& state) override;
     TouchEvent readTouch() override;
     int dashboardTouch(int x, int y);
-    HoldState updateHold(unsigned long holdMs) override;
+    HoldState updateHold(const TouchEvent& evt, unsigned long holdMs) override;
     int width() override { return DISPLAY_WIDTH; }
     int height() override { return DISPLAY_HEIGHT; }
 

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

@@ -261,10 +261,10 @@ int DisplayDriverGFX::dashboardTouch(int x, int y) {
     return row * cols + col;
 }
 
-HoldState DisplayDriverGFX::updateHold(unsigned long holdMs) {
+HoldState DisplayDriverGFX::updateHold(const TouchEvent& evt, unsigned long holdMs) {
     HoldState state;
 
-    if(!_lastTouch.pressed) {
+    if(!evt.pressed) {
         _isHolding = false;
         return state;
     }

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

@@ -13,7 +13,7 @@ public:
     void render(const ScreenState& state) override;
 
     TouchEvent readTouch() override;
-    HoldState updateHold(unsigned long holdMs) override;
+    HoldState updateHold(const TouchEvent& evt, unsigned long holdMs) override;
     void drawDebugTouch(int x, int y) override;
 
     int width() override;