feat: festival/series model with sub-events, cross-event sections, tab navigation, SectionsShiftsPanel extraction

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

api/database/factories/ShiftAssignmentFactory.php

@@ -0,0 +1,44 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Database\Factories;
+
+use App\Models\Person;
+use App\Models\Shift;
+use App\Models\ShiftAssignment;
+use App\Models\TimeSlot;
+use Illuminate\Database\Eloquent\Factories\Factory;
+
+/** @extends Factory<ShiftAssignment> */
+final class ShiftAssignmentFactory extends Factory
+{
+    /** @return array<string, mixed> */
+    public function definition(): array
+    {
+        return [
+            'shift_id' => Shift::factory(),
+            'person_id' => Person::factory(),
+            'time_slot_id' => TimeSlot::factory(),
+            'status' => 'pending_approval',
+            'auto_approved' => false,
+        ];
+    }
+
+    public function approved(): static
+    {
+        return $this->state(fn () => [
+            'status' => 'approved',
+            'approved_at' => now(),
+        ]);
+    }
+
+    public function autoApproved(): static
+    {
+        return $this->state(fn () => [
+            'status' => 'approved',
+            'auto_approved' => true,
+            'approved_at' => now(),
+        ]);
+    }
+}