chore: cleanup build artifacts and add .gitignore

build_binary.sh

@@ -0,0 +1,76 @@
+#!/bin/bash
+set -e
+
+echo "🔨 Building pyhdwallet standalone binary..."
+
+# Check venv more strictly
+if [ -z "$VIRTUAL_ENV" ] || [[ "$VIRTUAL_ENV" != *"hdwalletpy"* ]]; then
+    echo "❌ Not in virtual environment!"
+    echo ""
+    echo "Activate it first:"
+    echo "   source .venv/bin/activate"
+    exit 1
+fi
+
+# Install PyInstaller if needed
+if ! pip show pyinstaller &>/dev/null; then
+    echo "📦 Installing PyInstaller..."
+    pip install pyinstaller
+fi
+
+# Create patched version for frozen builds
+echo "📝 Creating frozen-compatible version..."
+python3 << 'PATCH'
+with open('src/pyhdwallet.py', 'r') as f:
+    content = f.read()
+
+# Patch _require() for PyInstaller
+content = content.replace(
+    """def _require(mod: str, pkg: str) -> None:
+    try:
+        __import__(mod)""",
+    """def _require(mod: str, pkg: str) -> None:
+    # Skip check in PyInstaller frozen executable
+    if getattr(sys, 'frozen', False):
+        return
+    try:
+        __import__(mod)"""
+)
+
+with open('src/pyhdwallet_frozen.py', 'w') as f:
+    f.write(content)
+PATCH
+
+# Clean previous builds
+rm -rf build/ dist/ *.spec
+
+# Build
+echo "🔧 Building with PyInstaller..."
+pyinstaller --onefile \
+  --name pyhdwallet \
+  --clean \
+  --collect-all bip_utils \
+  --collect-all pgpy \
+  --collect-all nacl \
+  --collect-all pyzipper \
+  --collect-all coincurve \
+  --copy-metadata coincurve \
+  src/pyhdwallet_frozen.py
+
+# Clean up temp file
+rm src/pyhdwallet_frozen.py
+
+# Test
+echo ""
+echo "✅ Testing binary..."
+./dist/pyhdwallet test
+
+# Show results
+echo ""
+echo "🎉 Binary created successfully!"
+echo "   Location: dist/pyhdwallet"
+echo "   Size: $(du -h dist/pyhdwallet | cut -f1)"
+echo ""
+echo "Quick test:"
+echo "   ./dist/pyhdwallet gen --help"
+echo "   ./dist/pyhdwallet gen-child --help"