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/Models/User.php

@@ -0,0 +1,80 @@
+<?php
+
+namespace App\Models;
+
+// use Illuminate\Contracts\Auth\MustVerifyEmail;
+use App\Enums\UserGroup;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+use Illuminate\Database\Eloquent\SoftDeletes;
+use Illuminate\Foundation\Auth\User as Authenticatable;
+use Illuminate\Notifications\Notifiable;
+use Laravel\Fortify\TwoFactorAuthenticatable;
+use Spatie\Activitylog\LogOptions;
+use Spatie\Activitylog\Traits\LogsActivity;
+
+class User extends Authenticatable
+{
+    /** @use HasFactory<\Database\Factories\UserFactory> */
+    use HasFactory, Notifiable, SoftDeletes, TwoFactorAuthenticatable, LogsActivity;
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var list<string>
+     */
+    protected $fillable = [
+        'name',
+        'email',
+        'password',
+        'group',
+    ];
+
+    /**
+     * The attributes that should be hidden for serialization.
+     *
+     * @var list<string>
+     */
+    protected $hidden = [
+        'password',
+        'two_factor_secret',
+        'two_factor_recovery_codes',
+        'remember_token',
+    ];
+
+    /**
+     * Get the attributes that should be cast.
+     *
+     * @return array<string, string>
+     */
+    protected function casts(): array
+    {
+        return [
+            'email_verified_at' => 'datetime',
+            'password' => 'hashed',
+            'group' => UserGroup::class,
+            'two_factor_confirmed_at' => 'datetime',
+        ];
+    }
+
+    /**
+     * The workspaces that the user belongs to.
+     *
+     * @return BelongsToMany<Workspace>
+     */
+    public function workspaces(): BelongsToMany
+    {
+        return $this->belongsToMany(Workspace::class, 'workspace_user')
+            ->using(\App\Models\WorkspaceUser::class)
+            ->withPivot('role')
+            ->withTimestamps();
+    }
+
+    public function getActivitylogOptions(): LogOptions
+    {
+        return LogOptions::defaults()
+            ->logFillable()
+            ->logOnlyDirty()
+            ->dontSubmitEmptyLogs();
+    }
+}