chore: bump version to 0.4.0

package.json

@@ -1,7 +1,7 @@
 {
   "name": "whispassist",
   "private": true,
-  "version": "0.3.0",
+  "version": "0.4.0",
   "type": "module",
   "description": "Privacy-first, fully local Windows meeting assistant.",
   "license": "MIT OR Apache-2.0",