Use startsWith for more precise port name matching

Co-authored-by: jyong15 <26561407+jyong15@users.noreply.github.com>

Author: Copilot

ShimmerDriverPC/src/main/java/com/shimmerresearch/pcSerialPort/SerialPortCommJssc.java

@@ -47,7 +47,7 @@ public SerialPortCommJssc(String comPort, String uniqueId, int baudToUse) {
 		mUniqueId = uniqueId;
 		mComPort = comPort;
 		// On MacOS, prefer cu.* over tty.* to avoid blocking on carrier detect
-		if(UtilShimmer.isOsMac() && mComPort.contains("/dev/tty.")) {
+		if(UtilShimmer.isOsMac() && mComPort.startsWith("/dev/tty.")) {
 			mComPort = mComPort.replace("/dev/tty.", "/dev/cu.");
 			consolePrintLn("MacOS detected: Using cu port instead of tty: " + mComPort);
 		}

ShimmerDriverPC/src/main/java/com/shimmerresearch/tools/bluetooth/BasicShimmerBluetoothManagerPc.java

@@ -242,7 +242,7 @@ public void connectShimmerThroughCommPort(String comPort){
 
 		// On MacOS, normalize tty to cu for consistent key management
 		String normalizedComPort = comPort;
-		if(UtilShimmer.isOsMac() && comPort.contains("/dev/tty.")) {
+		if(UtilShimmer.isOsMac() && comPort.startsWith("/dev/tty.")) {
 			normalizedComPort = comPort.replace("/dev/tty.", "/dev/cu.");
 		}