chore: add ESLint v9 config with typescript-eslint

- Add eslint.config.mjs with typescript-eslint integration
- Install typescript-eslint, @typescript-eslint/eslint-plugin, @typescript-eslint/parser
- Fix unused params warning in ipc-handlers.ts

package.json

@@ -42,6 +42,8 @@
     "@types/node": "^22.0.0",
     "@types/react": "^19.0.0",
     "@types/react-dom": "^19.0.0",
+    "@typescript-eslint/eslint-plugin": "^8.57.0",
+    "@typescript-eslint/parser": "^8.57.0",
     "@vitejs/plugin-react": "^4.3.0",
     "electron": "^30.5.1",
     "electron-builder": "^26.0.0",
@@ -51,6 +53,7 @@
     "eslint-plugin-react-hooks": "^5.0.0",
     "prettier": "^3.2.0",
     "typescript": "^5.7.0",
+    "typescript-eslint": "^8.57.0",
     "vite": "^5.4.0"
   }
 }