Downgrade to Typescript 5.6

This avoids a problem with vue-tsc and Typescript 5.7. See:

vuejs/language-tools#5018

Author: tim-script

package-lock.json

@@ -21,7 +21,7 @@
     },
     "dependencies": {
         "@vitejs/plugin-vue": "^5.2.1",
-        "typescript": "^5.7.2",
+        "typescript": "~5.6",
         "vue": "^3.5.13",
         "vue-router": "^4.5.0"
     }