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/Controllers/NotificationController.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use Illuminate\Http\RedirectResponse;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Cache;
+
+class NotificationController extends Controller
+{
+    public function markAsRead(Request $request, string $id): RedirectResponse
+    {
+        $request->user()
+            ->notifications()
+            ->where('id', $id)
+            ->firstOrFail()
+            ->markAsRead();
+
+        Cache::forget("user:{$request->user()->id}:unread_notifications");
+
+        return back();
+    }
+
+    public function markAllAsRead(Request $request): RedirectResponse
+    {
+        $request->user()->unreadNotifications->markAsRead();
+
+        Cache::forget("user:{$request->user()->id}:unread_notifications");
+
+        return back();
+    }
+}