debug: preserve UART hook in AP isolation loop

firmware/esp32/overland-controller/overland-controller.ino

@@ -4104,7 +4104,31 @@ void heapCheckpoint(const char* label) {
     }
 }
 
+
 void setup() {
+    Serial.begin(115200);
+    delay(2000);
+
+    Serial.println();
+    Serial.println("LilyGO compiled-project AP isolation test");
+
+    WiFi.persistent(false);
+    WiFi.setSleep(false);
+    WiFi.mode(WIFI_AP);
+
+    IPAddress ip(192, 168, 4, 1);
+    IPAddress gw(192, 168, 4, 1);
+    IPAddress mask(255, 255, 255, 0);
+    WiFi.softAPConfig(ip, gw, mask);
+
+    bool ok = WiFi.softAP("Overland-Isolation", "12345678", 6, false, 2);
+    Serial.print("softAP result: ");
+    Serial.println(ok ? "OK" : "FAILED");
+    Serial.print("AP IP: ");
+    Serial.println(WiFi.softAPIP());
+}
+
+void projectSetupDisabled() {
     Serial.begin(115200);
     delay(500);
     heapCheckpoint("setup:start");
@@ -4291,10 +4315,10 @@ void setup() {
 }
 
 void loop() {
-    dnsServer.processNextRequest();
 #if DASHBOARD_UART_ENABLED
     pollDashboardUart();
 #endif
-    delay(2);
+    delay(100);
 }
 
+