feat: multi-tenant SaaS implementation - admin interface, tenant isolation, and UI updates

app/Http/Controllers/TenantController.php

@@ -0,0 +1,64 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\Tenant;
+use Illuminate\Http\Request;
+use Inertia\Inertia;
+
+class TenantController extends Controller
+{
+    public function index()
+    {
+        if (!auth()->user()->isSuperAdmin()) {
+            abort(403, 'Unauthorized action.');
+        }
+
+        $tenants = Tenant::orderBy('name')->get();
+
+        return Inertia::render('Admin/Tenants/Index', [
+            'tenants' => $tenants
+        ]);
+    }
+
+    public function store(Request $request)
+    {
+        if (!auth()->user()->isSuperAdmin()) {
+            abort(403, 'Unauthorized action.');
+        }
+
+        $request->validate([
+            'name' => 'required|string|max:255|unique:tenants,name',
+        ]);
+
+        Tenant::create($request->only('name'));
+
+        return back()->with('success', 'Structure créée avec succès.');
+    }
+
+    public function update(Request $request, Tenant $tenant)
+    {
+        if (!auth()->user()->isSuperAdmin()) {
+            abort(403, 'Unauthorized action.');
+        }
+
+        $request->validate([
+            'name' => 'required|string|max:255|unique:tenants,name,' . $tenant->id,
+        ]);
+
+        $tenant->update($request->only('name'));
+
+        return back()->with('success', 'Structure mise à jour.');
+    }
+
+    public function destroy(Tenant $tenant)
+    {
+        if (!auth()->user()->isSuperAdmin()) {
+            abort(403, 'Unauthorized action.');
+        }
+
+        $tenant->delete();
+
+        return back()->with('success', 'Structure supprimée.');
+    }
+}