fix(macos): prevent crash from missing ClawdbotKit resources and Swift library

The macOS app was crashing in two scenarios:

1. Bundle.module crash (fixes #213): When the first tool event arrived,
   ToolDisplayRegistry tried to load config via ClawdbotKitResources.bundle,
   which used Bundle.module directly. In packaged apps, Bundle.module
   couldn't find the resource bundle at the expected path, causing a
   fatal assertion failure after ~40-80 minutes of runtime.

2. dyld crash (fixes #417): Swift 6.2 requires libswiftCompatibilitySpan.dylib
   but SwiftPM doesn't bundle it automatically, causing immediate crash on
   launch with "Library not loaded" error.

Changes:
- ClawdbotKitResources.swift: Replace direct Bundle.module access with a
  safe locator that checks multiple paths and falls back gracefully
- package-mac-app.sh: Copy ClawdbotKit_ClawdbotKit.bundle to Resources
- package-mac-app.sh: Copy libswiftCompatibilitySpan.dylib from Xcode
  toolchain to Frameworks

Tested on macOS 26.2 with Swift 6.2 - app launches and runs without crashes.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/package-mac-app.sh

@@ -221,6 +221,15 @@ if [ -d "$SPARKLE_FRAMEWORK_PRIMARY" ]; then
   chmod -R a+rX "$APP_ROOT/Contents/Frameworks/Sparkle.framework"
 fi
 
+echo "📦 Copying Swift 6.2 compatibility libraries"
+SWIFT_COMPAT_LIB="$(xcode-select -p)/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift-6.2/macosx/libswiftCompatibilitySpan.dylib"
+if [ -f "$SWIFT_COMPAT_LIB" ]; then
+  cp "$SWIFT_COMPAT_LIB" "$APP_ROOT/Contents/Frameworks/"
+  chmod +x "$APP_ROOT/Contents/Frameworks/libswiftCompatibilitySpan.dylib"
+else
+  echo "WARN: Swift compatibility library not found at $SWIFT_COMPAT_LIB (continuing)" >&2
+fi
+
 echo "🖼  Copying app icon"
 cp "$ROOT_DIR/apps/macos/Sources/Clawdbot/Resources/Clawdbot.icns" "$APP_ROOT/Contents/Resources/Clawdbot.icns"
 
@@ -228,6 +237,15 @@ echo "📦 Copying device model resources"
 rm -rf "$APP_ROOT/Contents/Resources/DeviceModels"
 cp -R "$ROOT_DIR/apps/macos/Sources/Clawdbot/Resources/DeviceModels" "$APP_ROOT/Contents/Resources/DeviceModels"
 
+echo "📦 Copying ClawdbotKit resources"
+CLAWDBOTKIT_BUNDLE="$(build_path_for_arch "$PRIMARY_ARCH")/$BUILD_CONFIG/ClawdbotKit_ClawdbotKit.bundle"
+if [ -d "$CLAWDBOTKIT_BUNDLE" ]; then
+  rm -rf "$APP_ROOT/Contents/Resources/ClawdbotKit_ClawdbotKit.bundle"
+  cp -R "$CLAWDBOTKIT_BUNDLE" "$APP_ROOT/Contents/Resources/ClawdbotKit_ClawdbotKit.bundle"
+else
+  echo "WARN: ClawdbotKit resource bundle not found at $CLAWDBOTKIT_BUNDLE (continuing)" >&2
+fi
+
 RELAY_DIR="$APP_ROOT/Contents/Resources/Relay"
 
 if [[ "${SKIP_GATEWAY_PACKAGE:-0}" != "1" ]]; then