dashboard: improve relay command responsiveness

firmware/esp32-s3-dashboard/esp32-s3-dashboard.ino

@@ -479,21 +479,42 @@ static bool post_relay_state(const String &relay_id, bool state)
     Serial.println(payload);
 
     HTTPClient http;
-    http.setTimeout(5000);
+    http.setTimeout(1200);
     http.begin(CARGO_API_RELAY_SET_URL);
     http.addHeader("Content-Type", "application/json");
 
+    unsigned long start_ms = millis();
     int code = http.POST(payload);
     String body = http.getString();
 
     Serial.print("Relay HTTP code: ");
-    Serial.println(code);
+    Serial.print(code);
+    Serial.print(" total=");
+    Serial.print(millis() - start_ms);
+    Serial.println("ms");
     Serial.println(body);
 
+    bool ok = code >= 200 && code < 300;
+
+    if (ok && body.length() > 0) {
+        DynamicJsonDocument response(512);
+        DeserializationError error = deserializeJson(response, body);
+        if (!error && response["state"].is<bool>()) {
+            bool applied_state = response["state"].as<bool>();
+            const char *applied_id = response["id"] | "";
+            for (int i = 0; i < relay_count; i++) {
+                if (relay_ids[i] == String(applied_id)) {
+                    relay_states[i] = applied_state;
+                    break;
+                }
+            }
+        }
+    }
+
     http.end();
     api_request_in_progress = false;
 
-    return code >= 200 && code < 300;
+    return ok;
 }
 
 static void relay_button_event_cb(lv_event_t *event)
@@ -1030,7 +1051,7 @@ static bool fetch_status_fields(const char *url, const char *label)
     unsigned long start_ms = millis();
 
     HTTPClient http;
-    http.setTimeout(5000);
+    http.setTimeout(900);
     http.begin(url);
     int code = http.GET();
 
@@ -1066,7 +1087,7 @@ static void poll_status_api()
         return;
     }
 
-    if (fast_status_refresh_requested || millis() - last_status_poll_ms >= 2000) {
+    if (fast_status_refresh_requested || millis() - last_status_poll_ms >= 1500) {
         fast_status_refresh_requested = false;
         last_status_poll_ms = millis();
         fetch_status_fields(CARGO_API_FAST_STATUS_URL, "fast status");
@@ -1444,5 +1465,5 @@ void loop()
     process_pending_relay_command();
     poll_status_api();
 
-    delay(250);
+    delay(50);
 }