Fix missing icon file issue on Windows build

- Make icon files optional in PyInstaller spec
- Check for icon.ico existence before using it on Windows
- Check for icon.icns existence before using it on macOS
- Added ICON_INFO.md with instructions for creating icon files
- Build will now succeed even without icon files present

ICON_INFO.md

+# Icon Files for MBetter USB Creator
+
+## Optional Icon Files
+
+The build script will look for these icon files but they are optional:
+
+- **Windows**: `icon.ico` - Windows icon file (.ico format)
+- **macOS**: `icon.icns` - macOS icon file (.icns format)
+
+## Creating Icon Files
+
+If you want to add icons to the executable:
+
+### For Windows (.ico):
+1. Create or find a suitable PNG/JPG image (preferably 256x256 or smaller)
+2. Convert to .ico format using online tools like:
+   - https://convertio.co/png-ico/
+   - https://icoconvert.com/
+3. Save as `icon.ico` in the same directory as `build_usb_creator.py`
+
+### For macOS (.icns):
+1. Create or find a suitable PNG image (preferably 512x512 or 1024x1024)
+2. Convert to .icns format using tools like:
+   - Icon Composer (part of Xcode developer tools)
+   - Online converters like https://cloudconvert.com/png-to-icns
+3. Save as `icon.icns` in the same directory as `build_usb_creator.py`
+
+## Note
+
+If no icon files are present, the executable will build successfully without icons. The icons are purely cosmetic and don't affect functionality.
\ No newline at end of file

build_usb_creator.py

@@ -104,14 +104,14 @@ exe = EXE(
     target_arch=None,
     codesign_identity=None,
     entitlements_file=None,
-    icon='icon.ico' if is_windows else None,
+    icon='icon.ico' if is_windows and os.path.exists('icon.ico') else None,
 )
 
 # Create app bundle on macOS
 if sys.platform == 'darwin':
     app = BUNDLE(exe,
                  name='MBetterUSBCreator.app',
-                 icon='icon.icns',
+                 icon='icon.icns' if os.path.exists('icon.icns') else None,
                  bundle_identifier='com.mbetter.usbcreator')
 '''