feat: add release build script (app + DMG)

build_release.sh: Clean → Build Release → Create DMG.
Outputs build/Bugger.app and build/Bugger-1.0.dmg.
Uses ad-hoc signing (no developer cert needed).
Supports both arm64 and x86_64 architectures.

Usage: ./scripts/build_release.sh

Co-Authored-By: Claude <noreply@anthropic.com>

scripts/build_release.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+# Build Bugger.app for distribution (personal use, ad-hoc signed).
+# Prerequisites: Config.xcconfig with your FEISHU_APP_ID / FEISHU_APP_SECRET.
+set -e
+cd "$(dirname "$0")/.."
+
+PROJECT="Bugger.xcodeproj"
+SCHEME="Bugger"
+VERSION="1.0"
+BUILD_DIR="build"
+APP_NAME="Bugger.app"
+
+echo "=== Cleaning ==="
+xcodebuild -project "$PROJECT" -scheme "$SCHEME" clean 1>/dev/null
+
+echo "=== Building Release ==="
+xcodebuild -project "$PROJECT" -scheme "$SCHEME" \
+    -configuration Release \
+    -derivedDataPath "$BUILD_DIR/derived" \
+    build 2>&1 | grep -E "^.../|error:|BUILD|warning:.*Swift"
+
+# Find the built .app
+APP_PATH=$(find "$BUILD_DIR/derived/Build/Products/Release" -name "*.app" -type d | head -1)
+if [ -z "$APP_PATH" ]; then
+    echo "ERROR: Could not find built .app"
+    exit 1
+fi
+
+echo ""
+echo "=== Built: $APP_PATH ==="
+echo ""
+
+# Copy to build root
+rm -rf "$BUILD_DIR/$APP_NAME"
+cp -R "$APP_PATH" "$BUILD_DIR/$APP_NAME"
+
+# Create DMG
+echo "=== Creating DMG ==="
+mkdir -p "$BUILD_DIR/dmg"
+rm -rf "$BUILD_DIR/dmg/"*
+cp -R "$BUILD_DIR/$APP_NAME" "$BUILD_DIR/dmg/"
+ln -sf /Applications "$BUILD_DIR/dmg/Applications" 2>/dev/null || true
+
+DMG="$BUILD_DIR/Bugger-${VERSION}.dmg"
+rm -f "$DMG"
+hdiutil create -volname Bugger -srcfolder "$BUILD_DIR/dmg" \
+    -ov -format UDZO "$DMG" 1>/dev/null
+
+echo ""
+echo "=== Done ==="
+echo "  App:  $PWD/$BUILD_DIR/$APP_NAME"
+echo "  DMG:  $PWD/$DMG"
+echo ""
+echo "To install:"
+echo "  cp -R $BUILD_DIR/$APP_NAME /Applications/"
+echo ""
+echo "On first launch, right-click the app → Open (Gatekeeper bypass)."