[client] Address the remaining bot findings on PR #7398

- Login logged the active-profile-state error and returned the same cause; the
  repo's guidelines call for one or the other, and the wrapped error is the one
  that carries context. (CodeRabbit)
- `netbird up` reported a codes.Unavailable SetConfig failure as "the daemon
  refused the settings update", but that code also covers a daemon that became
  unreachable. It now reports what the daemon said without asserting why.
  (cubic-dev-ai)
- TestLogin_ChangingTheManagementURLIsRefused asserted the error and nothing
  else, while "refused before it can touch daemon state" is the contract. It now
  checks the stored management URL, the in-progress login and the active profile,
  matching its SetConfig counterpart. (cubic-dev-ai)

client/cmd/up.go

@@ -353,10 +353,11 @@ func runInDaemonMode(ctx context.Context, cmd *cobra.Command, pm *profilemanager
 	req := setupSetConfigReq(customDNSAddressConverted, cmd, activeProf.ID.String(), username.Username)
 	if _, err := client.SetConfig(ctx, req); err != nil {
 		if st, ok := gstatus.FromError(err); ok && st.Code() == codes.Unavailable {
-			// The daemon refused the settings update, it did not lack the
-			// method: reporting the latter sent people looking for a version
-			// mismatch that was not there.
-			log.Warnf("the daemon refused the settings update: %s", st.Message())
+			// Report what the daemon said rather than asserting why: this code
+			// covers both a refused update and a daemon that became
+			// unreachable. Claiming the method was missing, as this used to,
+			// sent people looking for a version mismatch that was not there.
+			log.Warnf("the daemon did not apply the settings update: %s", st.Message())
 		} else {
 			return daemonCallError("call service setConfig method", err)
 		}