refactor: align codebase with EventCrew domain and trim legacy band stack

- Update API: events, users, policies, routes, resources, migrations
- Remove deprecated models/resources (customers, setlists, invitations, etc.)
- Refresh admin app and docs; remove apps/band

Made-with: Cursor

api/app/Http/Controllers/Api/V1/OrganisationController.php

@@ -0,0 +1,55 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Http\Controllers\Api\V1;
+
+use App\Http\Controllers\Controller;
+use App\Http\Requests\Api\V1\StoreOrganisationRequest;
+use App\Http\Requests\Api\V1\UpdateOrganisationRequest;
+use App\Http\Resources\Api\V1\OrganisationResource;
+use App\Models\Organisation;
+use Illuminate\Http\JsonResponse;
+use Illuminate\Http\Resources\Json\AnonymousResourceCollection;
+use Illuminate\Support\Facades\Gate;
+
+final class OrganisationController extends Controller
+{
+    public function index(): AnonymousResourceCollection
+    {
+        Gate::authorize('viewAny', Organisation::class);
+
+        $user = auth()->user();
+
+        $organisations = $user->hasRole('super_admin')
+            ? Organisation::query()->paginate()
+            : $user->organisations()->paginate();
+
+        return OrganisationResource::collection($organisations);
+    }
+
+    public function show(Organisation $organisation): JsonResponse
+    {
+        Gate::authorize('view', $organisation);
+
+        return $this->success(new OrganisationResource($organisation));
+    }
+
+    public function store(StoreOrganisationRequest $request): JsonResponse
+    {
+        Gate::authorize('create', Organisation::class);
+
+        $organisation = Organisation::create($request->validated());
+
+        return $this->created(new OrganisationResource($organisation));
+    }
+
+    public function update(UpdateOrganisationRequest $request, Organisation $organisation): JsonResponse
+    {
+        Gate::authorize('update', $organisation);
+
+        $organisation->update($request->validated());
+
+        return $this->success(new OrganisationResource($organisation->fresh()));
+    }
+}