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

resources/views/pages/settings/⚡appearance.blade.php

@@ -10,6 +10,6 @@ new class extends Component {
     @include('partials.settings-heading')
 
     <x-pages::settings.layout :heading="__('Appearance')" :subheading="__('Update the appearance settings for your account')">
-        <x-theme-toggle />
+        <x-theme-toggle mode="picker" class="w-full max-w-sm" data-test="appearance-picker" />
     </x-pages::settings.layout>
 </section>