refactor(display): split render into screen-specific draw methods

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

@@ -1,21 +1,8 @@
 #pragma once
 
 #include <Arduino.h>
-#include "ScreenState.h"
 #include "IDisplayDriver.h"
 
-struct TouchEvent {
-    bool pressed = false;
-    int  x = 0;
-    int  y = 0;
-};
-
-struct HoldState {
-    bool  active    = false;
-    bool  completed = false;
-    float progress  = 0.0f;   // 0.0 – 1.0
-};
-
 class DisplayDriverGFX : public IDisplayDriver {
 public:
     // ── IDisplayDriver ──
@@ -35,8 +22,16 @@ public:
     static DisplayDriverGFX& instance();
 
 private:
+    // Helper rendering functions
+    void drawAlert(const ScreenState& state);
+    void drawDashboard(const ScreenState& state);
+
     // Touch handling
     TouchEvent _lastTouch = {false, 0, 0};
     unsigned long _pressStartMs = 0;
     bool _isHolding = false;
+
+    // Screen tracking
+    ScreenID _lastScreen = ScreenID::BOOT;
+    bool _needsRedraw = true;
 };