feat: ticket views, statuses, participants, merge; mobile layout fixes (#5)

- New migrations: ticket views, statuses, participants, merge support
- New models: TicketView, TicketStatus, TicketParticipant
- New seeder: EmailTemplatesSeeder
- Console commands for ticketing
- Mobile: sidebar min-w-0/overflow-hidden, tab nav overflow-x-auto

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/Console/Commands/AutoCloseTickets.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace Dashboard\Ticketing\Console\Commands;
+
+use App\Models\Setting;
+use Dashboard\Ticketing\Models\Ticket;
+use Illuminate\Console\Command;
+
+class AutoCloseTickets extends Command
+{
+    protected $signature   = 'ticketing:auto-close';
+    protected $description = 'Close resolved tickets that have not been updated within the configured grace period.';
+
+    public function handle(): int
+    {
+        $days = (int) Setting::get('ticketing.auto_close_days', 0);
+
+        if ($days <= 0) {
+            $this->info('Auto-close is disabled (ticketing.auto_close_days = 0).');
+            return 0;
+        }
+
+        $cutoff = now()->subDays($days);
+
+        $count = Ticket::where('status', 'resolved')
+            ->where('updated_at', '<=', $cutoff)
+            ->update(['status' => 'closed']);
+
+        $this->info("Auto-closed {$count} ticket(s) resolved more than {$days} day(s) ago.");
+
+        return 0;
+    }
+}