Fix time sync error handling for Notecard startup condition

Co-authored-by: dorkmo <[email protected]>

Author: Copilot

TankAlarm-112025-Client-BluesOpta/TankAlarm-112025-Client-BluesOpta.ino

@@ -669,13 +669,22 @@ static void syncTimeFromNotecard() {
     gNotecardFailureCount++;
     return;
   }
-  JAddStringToObject(req, "mode", "auto");
   J *rsp = notecard.requestAndResponse(req);
   if (!rsp) {
     gNotecardFailureCount++;
     return;
   }
 
+  // Check for error response (e.g., "time is not yet set {no-time}")
+  // This is normal during startup before Notecard syncs with cloud
+  const char *err = JGetString(rsp, "err");
+  if (err && strlen(err) > 0) {
+    // Time not yet available - this is expected during startup
+    // Will retry on next call - don't count this as a failure
+    notecard.deleteResponse(rsp);
+    return;
+  }
+
   double time = JGetNumber(rsp, "time");
   if (time > 0) {
     gLastSyncedEpoch = time;

TankAlarm-112025-Server-BluesOpta/TankAlarm-112025-Server-BluesOpta.ino

@@ -2833,11 +2833,19 @@ static void ensureTimeSync() {
     if (!req) {
       return;
     }
-    JAddStringToObject(req, "mode", "auto");
     J *rsp = notecard.requestAndResponse(req);
     if (!rsp) {
       return;
     }
+    // Check for error response (e.g., "time is not yet set {no-time}")
+    // This is normal during startup before Notecard syncs with cloud
+    const char *err = JGetString(rsp, "err");
+    if (err && strlen(err) > 0) {
+      // Time not yet available - this is expected during startup
+      // Will retry on next call
+      notecard.deleteResponse(rsp);
+      return;
+    }
     double time = JGetNumber(rsp, "time");
     if (time > 0) {
       gLastSyncedEpoch = time;

TankAlarm-112025-Viewer-BluesOpta/TankAlarm-112025-Viewer-BluesOpta.ino

@@ -565,11 +565,19 @@ static void ensureTimeSync() {
     if (!req) {
       return;
     }
-    JAddStringToObject(req, "mode", "auto");
     J *rsp = notecard.requestAndResponse(req);
     if (!rsp) {
       return;
     }
+    // Check for error response (e.g., "time is not yet set {no-time}")
+    // This is normal during startup before Notecard syncs with cloud
+    const char *err = JGetString(rsp, "err");
+    if (err && strlen(err) > 0) {
+      // Time not yet available - this is expected during startup
+      // Will retry on next call
+      notecard.deleteResponse(rsp);
+      return;
+    }
     double time = JGetNumber(rsp, "time");
     if (time > 0) {
       gLastSyncedEpoch = time;