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

app/Livewire/Admin/AdminSettings.php

@@ -8,10 +8,12 @@ use Illuminate\Support\Facades\Storage;
 use Livewire\Attributes\Layout;
 use Livewire\Component;
 use Livewire\WithFileUploads;
+use NoNameWeb\LivewireMaterial\Concerns\Toasts;
 
 #[Layout('layouts.app')]
 class AdminSettings extends Component
 {
+    use Toasts;
     use WithFileUploads;
 
     public string $systemPassword = '';
@@ -34,6 +36,12 @@ class AdminSettings extends Component
 
     public $siteLogo;
 
+    /** Whether the "Remove the logo?" dialog is open. */
+    public bool $confirmingLogoRemoval = false;
+
+    /** Whether the "Remove the system password?" dialog is open. */
+    public bool $confirmingPasswordRemoval = false;
+
     public function mount(): void
     {
         $this->defaultExpiration = Setting::get('default_expiration', '') ?? '';
@@ -113,7 +121,7 @@ class AdminSettings extends Component
 
         $this->systemPassword = '';
 
-        session()->flash('message', __('Settings saved successfully.'));
+        $this->success(__('Settings saved successfully.'));
     }
 
     public function removeLogo(): void
@@ -125,14 +133,18 @@ class AdminSettings extends Component
             Setting::set('site_logo', null);
         }
 
-        session()->flash('message', __('Logo removed.'));
+        $this->confirmingLogoRemoval = false;
+
+        $this->success(__('Logo removed.'));
     }
 
     public function clearSystemPassword(): void
     {
         Setting::set('system_password', null);
 
-        session()->flash('message', __('System password cleared.'));
+        $this->confirmingPasswordRemoval = false;
+
+        $this->success(__('System password cleared.'));
     }
 
     public function render(): mixed