feat(backups): support scheduled backups for application storage targets

Add polymorphic volume backup scheduling for persistent volumes and directories, expose schedule management via API, and reorganize backup configuration and execution views.

resources/views/livewire/project/application/backup/create.blade.php

@@ -1,11 +1,11 @@
 <form class="flex flex-col w-full gap-4 rounded-sm" wire:submit="submit">
-    @if ($volumes->isEmpty())
-        <div class="text-warning">Add a persistent volume before configuring a backup.</div>
+    @if ($targets->isEmpty())
+        <div class="text-warning">Add a persistent volume or directory mount before configuring a backup.</div>
     @else
         <div class="grid grid-cols-1 gap-4 md:grid-cols-2">
-            <x-forms.select id="volumeId" label="Volume" required :disabled="$volumeLocked">
-                @foreach ($volumes as $volume)
-                    <option value="{{ $volume->id }}">{{ $volume->name }}</option>
+            <x-forms.select id="targetKey" label="Backup Target" required :disabled="$targetLocked">
+                @foreach ($targets as $target)
+                    <option value="{{ $target['key'] }}">{{ $target['type'] }}: {{ $target['name'] }}</option>
                 @endforeach
             </x-forms.select>
             <x-forms.input id="frequency" placeholder="0 0 * * * or daily"
@@ -13,24 +13,6 @@
                 label="Frequency" required />
         </div>
 
-        <div>
-            <h2 class="pb-2">S3</h2>
-            @if ($definedS3s->isEmpty())
-                <div class="text-sm text-neutral-600 dark:text-neutral-400">No validated S3 storages found.</div>
-            @else
-                <div class="flex flex-col gap-3">
-                    <x-forms.checkbox live id="saveToS3" label="Save to S3" />
-                    @if ($saveToS3)
-                        <x-forms.select id="s3StorageId" label="S3 Storage">
-                            @foreach ($definedS3s as $s3)
-                                <option value="{{ $s3->id }}">{{ $s3->name }}</option>
-                            @endforeach
-                        </x-forms.select>
-                    @endif
-                </div>
-            @endif
-        </div>
-
         <x-forms.button type="submit">Save</x-forms.button>
     @endif
 </form>