feat(Display): Improve touch handling and visual feedback

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;