Stage 3 — WO photos + ETA + QR + public tracking page

- HasMedia (Spatie) on WorkOrder with `photos` collection
- eta_at + tracking_token columns; token auto-generated on create
- Public /t/{token} page — tenant-scoped via subdomain, white-label themed
- QR code SVG via chillerlan/php-qrcode (inline modal + download)
- Filament: SpatieMediaLibraryFileUpload + ETA picker + tracking section
- EditWorkOrder header action "Link client (QR)" modal
- Fix: Auditable::dontSubmitEmptyLogs() → dontLogEmptyChanges() (removed in activitylog)
- Tests: TrackingPageTest (4 pass) covering token gen + cross-tenant isolation

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

database/migrations/2026_05_27_120000_add_eta_and_tracking_to_work_orders.php

@@ -0,0 +1,35 @@
+<?php
+
+use App\Models\Tenant\WorkOrder;
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Support\Str;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('work_orders', function (Blueprint $t) {
+            $t->dateTime('eta_at')->nullable()->after('closed_at');
+            $t->string('tracking_token', 32)->nullable()->after('eta_at');
+            $t->unique('tracking_token');
+        });
+
+        WorkOrder::withoutGlobalScopes()
+            ->whereNull('tracking_token')
+            ->cursor()
+            ->each(function (WorkOrder $wo) {
+                $wo->tracking_token = Str::random(24);
+                $wo->saveQuietly();
+            });
+    }
+
+    public function down(): void
+    {
+        Schema::table('work_orders', function (Blueprint $t) {
+            $t->dropUnique(['tracking_token']);
+            $t->dropColumn(['eta_at', 'tracking_token']);
+        });
+    }
+};