feat(boards): add ESP32-32E-4 (4" ST7796) board support

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

@@ -0,0 +1,31 @@
+#pragma once
+
+#include "board_config.h"
+
+#include <KlubhausCore.h>
+#include <TFT_eSPI.h>
+
+class DisplayDriverTFT : public IDisplayDriver {
+public:
+    void begin() override;
+    void setBacklight(bool on) override;
+    void render(const ScreenState& state) override;
+    TouchEvent readTouch() override;
+    int dashboardTouch(int x, int y) override;
+    HoldState updateHold(unsigned long holdMs) override;
+    void updateHint(int x, int y, bool active) override;
+    int width() override { return DISPLAY_WIDTH; }
+    int height() override { return DISPLAY_HEIGHT; }
+
+private:
+    void drawBoot();
+    void drawAlert(const ScreenState& st);
+    void drawDashboard(const ScreenState& st);
+
+    TFT_eSPI _tft;
+
+    bool _holdActive = false;
+    uint32_t _holdStartMs = 0;
+    ScreenID _lastScreen = ScreenID::BOOT;
+    bool _needsRedraw = true;
+};