fix: WebSocket connection, global shortcut, and accessibility

- Add model query param to WebSocket URL (was causing handshake failure)
- Suppress "connection lost" error on intentional disconnect
- Fix shortcut recording with NSEvent local monitor
- Add proper keycode-to-string mapping for shortcut display
- Move app lifecycle to NSApplicationDelegate for reliable window management
- Prompt for Accessibility permission on first launch
- Add build-app.sh for proper .app bundle creation

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

MyVoxtral/build-app.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+set -e
+
+APP_NAME="MyVoxtral"
+BUILD_DIR=".build/arm64-apple-macosx/debug"
+APP_BUNDLE="$BUILD_DIR/$APP_NAME.app"
+
+# Build
+swift build
+
+# Create .app bundle structure
+rm -rf "$APP_BUNDLE"
+mkdir -p "$APP_BUNDLE/Contents/MacOS"
+mkdir -p "$APP_BUNDLE/Contents/Resources"
+
+# Copy binary
+cp "$BUILD_DIR/$APP_NAME" "$APP_BUNDLE/Contents/MacOS/$APP_NAME"
+
+# Copy Info.plist
+cp "$APP_NAME/Info.plist" "$APP_BUNDLE/Contents/Info.plist"
+
+# Add CFBundleExecutable to Info.plist
+/usr/libexec/PlistBuddy -c "Add :CFBundleExecutable string $APP_NAME" "$APP_BUNDLE/Contents/Info.plist" 2>/dev/null || true
+/usr/libexec/PlistBuddy -c "Add :CFBundleIdentifier string com.myvoxtral.app" "$APP_BUNDLE/Contents/Info.plist" 2>/dev/null || true
+/usr/libexec/PlistBuddy -c "Add :CFBundleName string $APP_NAME" "$APP_BUNDLE/Contents/Info.plist" 2>/dev/null || true
+/usr/libexec/PlistBuddy -c "Add :CFBundlePackageType string APPL" "$APP_BUNDLE/Contents/Info.plist" 2>/dev/null || true
+
+echo "Built: $APP_BUNDLE"
+echo "Run with: open $APP_BUNDLE"