feat: Implement recursive storage listing and directory browsing for backups, and add a migration option to fix cross-filters.

frontend/src/routes/tools/storage/+page.svelte

@@ -148,7 +148,10 @@
         {#each currentPath.split('/').slice(1) as part, i}
           <span class="mx-2">/</span>
           <button
-            on:click={() => { currentPath = currentPath.split('/').slice(0, i + 1).join('/'); loadFiles(); }}
+            on:click={() => {
+              currentPath = currentPath.split('/').slice(0, i + 2).join('/');
+              loadFiles();
+            }}
             class="hover:text-indigo-600 capitalize"
           >
             {part}
@@ -198,7 +201,7 @@
             <svg class="h-4 w-4 mr-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 19l-7-7m0 0l7-7m-7 7h18" />
             </svg>
-            Back
+            {$t.common?.back}
           </button>
         {/if}
       </div>
@@ -219,4 +222,4 @@
 <!-- [/SECTION: TEMPLATE] -->
 
 
-<!-- [/DEF:StoragePage:Component] -->
+<!-- [/DEF:StoragePage:Component] -->