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/Concerns/ProfileValidationRules.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace App\Concerns;
+
+use App\Models\User;
+use Illuminate\Validation\Rule;
+
+trait ProfileValidationRules
+{
+    /**
+     * Get the validation rules used to validate user profiles.
+     *
+     * @return array<string, array<int, \Illuminate\Contracts\Validation\Rule|array<mixed>|string>>
+     */
+    protected function profileRules(?int $userId = null): array
+    {
+        return [
+            'name' => $this->nameRules(),
+            'email' => $this->emailRules($userId),
+        ];
+    }
+
+    /**
+     * Get the validation rules used to validate user names.
+     *
+     * @return array<int, \Illuminate\Contracts\Validation\Rule|array<mixed>|string>
+     */
+    protected function nameRules(): array
+    {
+        return ['required', 'string', 'max:255'];
+    }
+
+    /**
+     * Get the validation rules used to validate user emails.
+     *
+     * @return array<int, \Illuminate\Contracts\Validation\Rule|array<mixed>|string>
+     */
+    protected function emailRules(?int $userId = null): array
+    {
+        return [
+            'required',
+            'string',
+            'email',
+            'max:255',
+            $userId === null
+                ? Rule::unique(User::class)
+                : Rule::unique(User::class)->ignore($userId),
+        ];
+    }
+}