feat: festival/event model frontend + topbar activeren

- Events lijst: card grid met festival/serie chips
- Festival detail: programmaonderdelen grid
- CreateSubEventDialog voor sub-events binnen festival
- EventTabsNav: breadcrumb terug naar festival
- Sessie A: festival-bewuste EventResource + children endpoint
- Topbar: zoekbalk, theme switcher, shortcuts, notificaties
- Schema v1.7 + BACKLOG.md toegevoegd
- 121 tests groen

api/database/factories/EventFactory.php

@@ -27,6 +27,7 @@ final class EventFactory extends Factory
             'end_date' => fake()->dateTimeBetween($startDate, (clone $startDate)->modify('+3 days')),
             'timezone' => 'Europe/Amsterdam',
             'status' => 'draft',
+            'event_type' => 'event',
         ];
     }
 
@@ -34,4 +35,31 @@ final class EventFactory extends Factory
     {
         return $this->state(fn () => ['status' => 'published']);
     }
+
+    public function festival(): static
+    {
+        return $this->state(fn () => [
+            'event_type' => 'festival',
+            'event_type_label' => 'Festival',
+            'sub_event_label' => 'Dag',
+        ]);
+    }
+
+    public function series(): static
+    {
+        return $this->state(fn () => [
+            'event_type' => 'series',
+            'event_type_label' => 'Serie',
+            'sub_event_label' => 'Editie',
+        ]);
+    }
+
+    public function subEvent(Event $parent): static
+    {
+        return $this->state(fn () => [
+            'parent_event_id' => $parent->id,
+            'organisation_id' => $parent->organisation_id,
+            'event_type' => 'event',
+        ]);
+    }
 }