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

routes/web.php

@@ -32,8 +32,4 @@ Route::middleware(['auth', 'admin'])->prefix('admin')->group(function () {
     Route::livewire('settings', AdminSettings::class)->name('admin.settings');
 });
 
-Route::view('dashboard', 'dashboard')
-    ->middleware(['auth', 'verified'])
-    ->name('dashboard');
-
 require __DIR__.'/settings.php';