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/livewire/system-password-prompt.blade.php

@@ -4,11 +4,11 @@
     <form wire:submit="verify" class="flex flex-col gap-6">
         <x-password
             wire:model="password"
-            label="{{ __('Password') }}"
+            :label="__('Password')"
             required
-            placeholder="{{ __('System password') }}"
+            :placeholder="__('System password')"
         />
 
-        <x-button type="submit" label="{{ __('Continue') }}" class="btn-primary w-full" spinner="verify" />
+        <x-button type="submit" :label="__('Continue')" variant="filled" class="w-full" spinner="verify" />
     </form>
 </div>