feat(projects): usuarios/empresas del proyecto como tablas Rappasoft + permiso assign companies

- Permiso 'assign companies' propio (antes empresas reutilizaba 'assign users');
  concedido a los roles que ya tenían 'assign users'.
- ProjectUsersTable y ProjectCompaniesTable (Rappasoft): búsqueda, filtro por rol,
  cambio de rol en línea y quitar; gateadas por assign users / assign companies.
- ProjectUsers/ProjectCompanies quedan como contenedor (form de asignación) que
  embebe la tabla y refresca el desplegable vía eventos.
- Unificadas confirmaciones (wire:confirm) y notificaciones (dispatch notify).

Tests: ProjectAssignmentsTest (4). Suite 69 passing (solo 2 pre-existentes sqlite).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/Livewire/ProjectUsers.php

@@ -2,15 +2,15 @@
 
 namespace App\Livewire;
 
-use Livewire\Component;
 use App\Models\Project;
 use App\Models\User;
 use Illuminate\Support\Facades\Auth;
+use Livewire\Attributes\On;
+use Livewire\Component;
 
 class ProjectUsers extends Component
 {
     public Project $project;
-    public $assignedUsers = [];
     public $allUsers = [];
     public $selectedUserId = '';
     public $selectedRole = 'viewer';
@@ -18,64 +18,46 @@ class ProjectUsers extends Component
     public function mount(Project $project)
     {
         $this->project = $project;
-        $this->loadUsers();
+        $this->loadAvailable();
     }
 
-    public function loadUsers()
+    /** Users not yet assigned to the project (for the dropdown). */
+    public function loadAvailable(): void
     {
-        $this->assignedUsers = $this->project->users()->withPivot('role_in_project')->get();
-        $assignedIds = $this->assignedUsers->pluck('id')->toArray();
+        $assignedIds = $this->project->users()->pluck('users.id')->toArray();
         $this->allUsers = User::whereNotIn('id', $assignedIds)->orderBy('name')->get();
     }
 
+    /** Reload the dropdown when the embedded table changes assignments. */
+    #[On('project-users-changed')]
+    public function onUsersChanged(): void
+    {
+        $this->loadAvailable();
+    }
+
     public function assignUser()
     {
-        $user = Auth::user();
-        if (!$user->can('assign users')) {
-            session()->flash('error', 'No tienes permisos para asignar usuarios.');
-            return;
-        }
+        abort_unless(Auth::user()->can('assign users'), 403);
 
         $this->validate([
             'selectedUserId' => 'required|exists:users,id',
-            'selectedRole' => 'required|in:supervisor,consultant,client,viewer',
+            'selectedRole'   => 'required|in:' . implode(',', array_keys(ProjectUsersTable::ROLES)),
         ]);
 
         $this->project->users()->attach($this->selectedUserId, [
-            'role_in_project' => $this->selectedRole
+            'role_in_project' => $this->selectedRole,
         ]);
 
         $this->reset(['selectedUserId', 'selectedRole']);
-        $this->loadUsers();
+        $this->loadAvailable();
+        $this->dispatch('project-users-changed');
         $this->dispatch('notify', 'Usuario asignado al proyecto.');
     }
 
-    public function removeUser($userId)
-    {
-        $user = Auth::user();
-        if (!$user->can('assign users')) {
-            session()->flash('error', 'Sin permisos.');
-            return;
-        }
-
-        $this->project->users()->detach($userId);
-        $this->loadUsers();
-        $this->dispatch('notify', 'Usuario eliminado del proyecto.');
-    }
-
-    public function changeRole($userId, $role)
-    {
-        if (!in_array($role, ['supervisor', 'consultant', 'client', 'viewer'])) return;
-
-        $this->project->users()->updateExistingPivot($userId, [
-            'role_in_project' => $role
-        ]);
-        $this->loadUsers();
-        $this->dispatch('notify', 'Rol actualizado.');
-    }
-
     public function render()
     {
-        return view('livewire.project-users');
+        return view('livewire.project-users', [
+            'roles' => ProjectUsersTable::ROLES,
+        ]);
     }
-}
+}