Move SealShare onto Livewire Material

Replaces maryUI and daisyUI with nonameweb/livewire-material: the Vibrant
indigo scheme, a system/light/dark theme under sealshare-theme, one top
app bar with the account menu, the upload drop zone and link-ready
moments, M3 fields, dialogs instead of wire:confirm, snackbars instead of
flashed messages, a sortable admin table, and the starter-kit cleanup.
Docker builds assets after Composer; CI drops the Flux step.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V9NnLxnPp8vaaurb3Z1MFy

tests/Feature/Admin/AdminDashboardTest.php

@@ -54,7 +54,9 @@ test('admin can delete share', function () {
 
     Livewire::actingAs($admin)
         ->test(AdminDashboard::class)
-        ->call('deleteShare', $shareId);
+        ->set('deletingShareId', $shareId)
+        ->call('deleteShare', $shareId)
+        ->assertSet('deletingShareId', null);
 
     expect(Share::query()->find($shareId))->toBeNull();
 });
@@ -69,3 +71,19 @@ test('admin dashboard shows shares table', function () {
     $response->assertOk();
     $response->assertSee('testtoken12345678');
 });
+
+test('the shares table sorts only by its own columns', function () {
+    $admin = User::query()->where('is_admin', true)->first();
+
+    Share::factory()->create(['token' => 'aaaaaaaaaaaaaaaa', 'download_count' => 9]);
+    Share::factory()->create(['token' => 'zzzzzzzzzzzzzzzz', 'download_count' => 1]);
+
+    Livewire::actingAs($admin)
+        ->test(AdminDashboard::class)
+        ->set('sortBy', ['column' => 'download_count', 'direction' => 'asc'])
+        ->assertSeeInOrder(['zzzzzzzzzzzzzzzz', 'aaaaaaaaaaaaaaaa'])
+        ->set('sortBy', ['column' => 'token; drop table shares', 'direction' => 'sideways'])
+        ->assertOk();
+
+    expect(Share::query()->count())->toBe(2);
+});