fix: suppress all e-ink refreshes during boot with setAutoDisplay(false)

Co-authored-by: Cursor <cursoragent@cursor.com>

src/main.cpp

@@ -173,8 +173,12 @@ void webActionCallback(const String& action) {
 
 void setup() {
     auto cfg = M5.config();
+    cfg.clear_display = false;  // Don't clear/refresh e-ink on init
     M5.begin(cfg);
 
+    // Prevent any automatic e-ink refreshes until we explicitly call display()
+    M5.Display.setAutoDisplay(false);
+
     Serial.begin(115200);
     Serial.println("[main] Immich Frame v1.0 booting...");