directory back up (parent) button + drag entry into parent to move

frontend/stores/index.ts

@@ -1,6 +1,7 @@
 import { defineStore } from 'pinia';
 import type { DirectoryEntry } from '#shared/types';
 import type { WarrenData } from '#shared/types/warrens';
+import { getParentPath } from '~/utils/files';
 
 export const useWarrenStore = defineStore('warrens', {
     state: () => ({
@@ -29,6 +30,13 @@ export const useWarrenStore = defineStore('warrens', {
 
             this.current.path += path;
         },
+        backCurrentPath() {
+            if (this.current == null || this.current.path === '/') {
+                return;
+            }
+
+            this.current.path = getParentPath(this.current.path);
+        },
         setCurrentWarrenPath(path: string) {
             if (this.current == null) {
                 return;