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/PasswordValidationRules.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Concerns;
+
+use Illuminate\Contracts\Validation\Rule;
+use Illuminate\Validation\Rules\Password;
+
+trait PasswordValidationRules
+{
+    /**
+     * Get the validation rules used to validate passwords.
+     *
+     * @return array<int, Rule|array<mixed>|string>
+     */
+    protected function passwordRules(): array
+    {
+        return ['required', 'string', Password::default(), 'confirmed'];
+    }
+
+    /**
+     * Get the validation rules used to validate the current password.
+     *
+     * @return array<int, Rule|array<mixed>|string>
+     */
+    protected function currentPasswordRules(): array
+    {
+        return ['required', 'string', 'current_password'];
+    }
+}