feat(touch): add continuous touch polling and debug logging

boards/esp32-32e-4/esp32-32e-4.ino

@@ -21,6 +21,20 @@ void setup() {
 }
 
 void loop() {
+    // ── Touch debug: poll continuously ──
+    TouchEvent evt = display.readTouch();
+    if(evt.pressed) {
+        Serial.printf("[TOUCH] pressed: x=%d, y=%d\n", evt.x, evt.y);
+    } else {
+        // Debug: print raw Z even when not touched, to see controller state
+        static uint32_t lastDebug = 0;
+        if(millis() - lastDebug > 2000) {
+            lastDebug = millis();
+            uint16_t z = tftDriver.getRawTouchZ();
+            Serial.printf("[TOUCH] Raw Z=%d\n", z);
+        }
+    }
+
     // ── State machine tick ──
     logic.update();
 
@@ -68,4 +82,7 @@ void loop() {
         if(cmd.length() > 0)
             logic.onSerialCommand(cmd);
     }
+
+    // Yield to WiFi/BT stack (prevents Task Watchdog timeout)
+    delay(10);
 }