Gestión de usuarios por proyecto: ProjectUsers Livewire, AdminUsers, panel admin con roles, protección de rutas

app/Livewire/AdminUsers.php

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+<?php
+
+namespace App\Livewire;
+
+use Livewire\Component;
+use App\Models\User;
+use Spatie\Permission\Models\Role;
+use Illuminate\Support\Facades\Auth;
+
+class AdminUsers extends Component
+{
+    public $users;
+    public $roles;
+
+    public function mount()
+    {
+        if (!Auth::user()->hasRole('Admin')) {
+            abort(403);
+        }
+        $this->roles = Role::all();
+        $this->loadUsers();
+    }
+
+    public function loadUsers()
+    {
+        $this->users = User::with('roles')->orderBy('name')->get();
+    }
+
+    public function updateRole($userId, $roleName)
+    {
+        $user = Auth::user();
+        if (!$user->hasRole('Admin')) {
+            session()->flash('error', 'Solo administradores.');
+            return;
+        }
+
+        $targetUser = User::findOrFail($userId);
+        if ($targetUser->id === $user->id && $targetUser->hasRole('Admin')) {
+            session()->flash('error', 'No puedes cambiarte el rol a ti mismo.');
+            return;
+        }
+
+        $targetUser->syncRoles([$roleName]);
+        $this->loadUsers();
+        $this->dispatch('notify', 'Rol actualizado.');
+    }
+
+    public function render()
+    {
+        return view('livewire.admin-users');
+    }
+}

app/Livewire/ProjectUsers.php

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+<?php
+
+namespace App\Livewire;
+
+use Livewire\Component;
+use App\Models\Project;
+use App\Models\User;
+use Illuminate\Support\Facades\Auth;
+
+class ProjectUsers extends Component
+{
+    public Project $project;
+    public $assignedUsers = [];
+    public $allUsers = [];
+    public $selectedUserId = '';
+    public $selectedRole = 'viewer';
+
+    public function mount(Project $project)
+    {
+        $this->project = $project;
+        $this->loadUsers();
+    }
+
+    public function loadUsers()
+    {
+        $this->assignedUsers = $this->project->users()->withPivot('role_in_project')->get();
+        $assignedIds = $this->assignedUsers->pluck('id')->toArray();
+        $this->allUsers = User::whereNotIn('id', $assignedIds)->orderBy('name')->get();
+    }
+
+    public function assignUser()
+    {
+        $user = Auth::user();
+        if (!$user->can('assign users') && !$user->hasRole('Admin')) {
+            session()->flash('error', 'No tienes permisos para asignar usuarios.');
+            return;
+        }
+
+        $this->validate([
+            'selectedUserId' => 'required|exists:users,id',
+            'selectedRole' => 'required|in:supervisor,consultant,client,viewer',
+        ]);
+
+        $this->project->users()->attach($this->selectedUserId, [
+            'role_in_project' => $this->selectedRole
+        ]);
+
+        $this->reset(['selectedUserId', 'selectedRole']);
+        $this->loadUsers();
+        $this->dispatch('notify', 'Usuario asignado al proyecto.');
+    }
+
+    public function removeUser($userId)
+    {
+        $user = Auth::user();
+        if (!$user->can('assign users') && !$user->hasRole('Admin')) {
+            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');
+    }
+}