feat: L'Ami Fiduciaire V1.0.0 — full codebase with Story 0.1 complete

Initial commit of the L'Ami Fiduciaire SaaS platform built on Laravel 12,
Vue 3, Inertia.js 2, and Tailwind CSS 4.

Story 0.1 (rename folders to declarations in database) is implemented and
code-reviewed: migration, rollback, and 6 Pest tests all passing.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Http/Requests/StoreWorkspaceRequest.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace App\Http\Requests;
+
+use App\Enums\WorkspaceUserRole;
+use App\Models\Workspace;
+use Illuminate\Contracts\Validation\ValidationRule;
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
+
+class StoreWorkspaceRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     */
+    public function authorize(): bool
+    {
+        return $this->user() !== null;
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array<string, ValidationRule|array<mixed>|string>
+     */
+    public function rules(): array
+    {
+        return [
+            'name' => ['required', 'string', 'max:255'],
+            'slug' => ['nullable', 'string', 'max:255', Rule::unique(Workspace::class)],
+            'user_ids' => ['array'],
+            'user_ids.*' => ['integer', 'exists:users,id'],
+            'user_roles' => ['nullable', 'array'],
+            'user_roles.*' => ['string', 'in:' . implode(',', WorkspaceUserRole::getValues())],
+        ];
+    }
+}