Update MD5 checksum generation to include both binary and zip

- Modified mbetter_latest.md5.txt to contain two lines:
  client:md5sum_of_MbetterClient_binary
  zip:md5sum_of_mbetterc_latest.zip
- Provides integrity verification for both the executable and distribution package

build.sh

@@ -93,10 +93,20 @@ if [ -d "dist" ] && [ "$(ls -A dist)" ]; then
         zip -r mbetterc_latest.zip "$EXECUTABLE_NAME"
         echo "   📦 Created: mbetterc_latest.zip"
 
-        # Generate MD5 checksum
+        # Generate MD5 checksums for both binary and zip
         if command -v md5sum &> /dev/null; then
-            md5sum mbetterc_latest.zip > mbetter_latest.md5.txt
-            echo "   🔐 Generated MD5 checksum: mbetter_latest.md5.txt"
+            # Calculate MD5 for the binary
+            BINARY_MD5=$(md5sum "$EXECUTABLE_NAME" | cut -d' ' -f1)
+            # Calculate MD5 for the zip
+            ZIP_MD5=$(md5sum mbetterc_latest.zip | cut -d' ' -f1)
+
+            # Write both checksums to file
+            echo "client:$BINARY_MD5" > mbetter_latest.md5.txt
+            echo "zip:$ZIP_MD5" >> mbetter_latest.md5.txt
+
+            echo "   🔐 Generated MD5 checksums: mbetter_latest.md5.txt"
+            echo "      Binary MD5: $BINARY_MD5"
+            echo "      Zip MD5: $ZIP_MD5"
         else
             echo "   ⚠️  md5sum command not available, skipping checksum generation"
         fi