Enhance touchscreen handling: Implement backlight control on first touch and debounce touch events to improve responsiveness

esphome/master_bedroom_remote.yaml

@@ -120,13 +120,22 @@ touchscreen:
       y_max: 3860
     on_touch:
       - lambda: |-
-          id(last_interaction_ms) = millis();
+          uint32_t now = millis();
+          id(last_interaction_ms) = now;
+
+          // Wake backlight on first touch only, don't also trigger a button
           if (!id(backlight_is_on)) {
             auto call = id(backlight).turn_on();
             call.perform();
             id(backlight_is_on) = true;
+            id(last_button_press_ms) = now;
             return;
           }
+
+          // Debounce: ignore repeated touch events within 600ms
+          if ((uint32_t)(now - id(last_button_press_ms)) < 600) return;
+          id(last_button_press_ms) = now;
+
           ESP_LOGD("touch", "Touch at x=%d, y=%d", touch.x, touch.y);
 
           // Button 1: Toggle All (top-left)
@@ -236,6 +245,9 @@ globals:
   - id: last_interaction_ms
     type: uint32_t
     initial_value: "0"
+  - id: last_button_press_ms
+    type: uint32_t
+    initial_value: "0"
   - id: backlight_is_on
     type: bool
     initial_value: "true"