Fix transfer create uploads getting stuck and failing on submit.

All files now upload through chunked sessions only, the file picker no longer
rewrites the queue on change, and create submits upload_ids instead of a broken
multipart files field.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/Feature/TransferTest.php

@@ -47,6 +47,48 @@ class TransferTest extends TestCase
         $this->assertTrue($transfer->paid_until->isFuture());
     }
 
+    public function test_authenticated_user_can_create_transfer_from_chunked_upload_ids(): void
+    {
+        Storage::fake('qr');
+        $this->fakeTransferBillingApi();
+
+        $user = User::create([
+            'public_id' => (string) Str::uuid(),
+            'name' => 'Test User',
+            'email' => 'transfer+'.uniqid().'@example.com',
+        ]);
+
+        $init = $this->actingAs($user)->postJson(route('transfer.transfers.upload.init'), [
+            'filename' => 'brief.pdf',
+            'filesize' => 12,
+        ])->assertOk()->json();
+
+        $uploadId = (string) ($init['upload_id'] ?? '');
+        $this->assertNotSame('', $uploadId);
+
+        $chunk = UploadedFile::fake()->createWithContent('chunk_0', str_repeat('a', 12));
+        $this->actingAs($user)->post(route('transfer.transfers.upload.chunk'), [
+            'upload_id' => $uploadId,
+            'chunk_index' => 0,
+            'chunk_size' => 12,
+            'chunk' => $chunk,
+        ])->assertOk();
+
+        $this->actingAs($user)->postJson(route('transfer.transfers.upload.finalize'), [
+            'upload_id' => $uploadId,
+            'total_chunks' => 1,
+        ])->assertOk();
+
+        $this->actingAs($user)->post(route('transfer.transfers.store'), [
+            'title' => 'Chunked assets',
+            'upload_ids' => [$uploadId],
+        ])->assertRedirect();
+
+        $this->assertDatabaseCount('transfers', 1);
+        $this->assertDatabaseCount('transfer_files', 1);
+        $this->assertDatabaseHas('transfer_files', ['original_name' => 'brief.pdf']);
+    }
+
     public function test_dashboard_requires_auth(): void
     {
         $this->get(route('transfer.dashboard'))->assertRedirect();