feat: error handing: alert -> dialog

frontend/src/stores/error.store.ts

@@ -0,0 +1,23 @@
+import { defineStore } from "pinia";
+
+export interface ErrorState {
+    show: boolean
+    message: string
+}
+
+export const useErrorStore = defineStore("error", {
+    state: (): ErrorState => ({
+        show: false,
+        message: ""
+    }),
+    actions: {
+        summon(message: string) {
+            this.show = true
+            this.message = message
+        },
+        close() {
+            this.show = false
+            this.message = ""
+        }
+    }
+})