feat(client): uniform LED signaling — off after 60s stable connection

src/client.cpp

@@ -47,6 +47,12 @@ static bool relay1SendState = false;
 static bool relay2SendState = false;
 static uint32_t seq = 0;
 
+#define STABLE_LED_TIMEOUT_MS 60000
+uint32_t connectionStableMs = 0;
+uint32_t relayFlashUntil = 0;
+bool otaInProgress = false;
+bool otaEnded = false;
+
 static bool bleReady = false;
 static bool serverFound = false;
 static NimBLEAddress serverAddress;
@@ -365,13 +371,40 @@ void loop() {
     bool relay1State = t1Active || btnActive;
     bool relay2State = t2Active;
 
-    if (relay1State || relay2State) {
+    CRGB ledColor;
-        leds[0] = CRGB::Green;
+
-    } else if (connected) {
+    if (otaInProgress) {
-        leds[0] = CRGB::Blue;
+        ledColor = otaEnded
+            ? CRGB::Yellow
+            : (((millis() / 100) % 2) ? CRGB::Green : CRGB::Black);
     } else {
-        leds[0] = CRGB::Red;
+        if (connected) {
+            if (connectionStableMs == 0) connectionStableMs = millis();
+        } else {
+            connectionStableMs = 0;
         }
+
+        if (connected) {
+            ledColor = (millis() - connectionStableMs >= STABLE_LED_TIMEOUT_MS)
+                ? CRGB::Black
+                : CRGB::Yellow;
+        } else {
+            ledColor = CRGB::Red;
+        }
+
+        static bool lastRelayActive = false;
+        bool relayActive = relay1State || relay2State;
+        if (relayActive != lastRelayActive) {
+            relayFlashUntil = millis() + 150;
+        }
+        lastRelayActive = relayActive;
+
+        if (millis() < relayFlashUntil) {
+            ledColor = CRGB::Green;
+        }
+    }
+
+    leds[0] = ledColor;
     FastLED.show();
 
     if (connected && pCmdChar != nullptr) {