security: fix 27 vulnerabilities + UI integration (Issues tab, project nav, validation)

Security fixes (27 vulnerabilities across 20 files):
CRITICAL:
- MediaManager: whitelist mediable types prevents RCE via class instantiation
- MediaManager/OfflineSyncController: IDOR fixes, remove Auth::id()??1 fallback
- ClientProjects: verify project ownership on all mutations (IDOR)
- CompanyManagement: Admin role check on mount() and mutations (auth bypass)
- ProjectMap: scope feature/template lookups to current project (IDOR x5)
- PhaseList/TemplateManager/LayerManager: scope mutations to owned resources (IDOR)
- ProjectEditTabs: Gate::authorize on mount() and updateProject()
- routes/web.php: reports routes moved inside can:manage all middleware (auth bypass)

MEDIUM:
- layer-manager: escapeHtml() on Leaflet popup interpolations (XSS)
- MediaManager: server-side MIME validation + 50MB limit
- ProjectList/ProjectUsers/ProjectCompanies/PhaseProgress: auth checks added
- AdminUsers/ReportsDashboard/ExportController: role/permission checks added

LOW:
- config/session.php: secure cookie tied to production env
- OfflineSyncController: sanitize storage path (path traversal)

UI integration:
- project-map: Issues tab (4th) with open-count badge
- project-map: project navigation bar (Dashboard/Map/Gantt/Report/Issues)
- project-dashboard: action buttons for Map/Gantt/Report/Issues
- project-form: validation error summary + per-field @error spans
- template-manager: validation error display

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Livewire/AdminUsers.php

@@ -9,38 +9,57 @@ use Illuminate\Support\Facades\Auth;
 
 class AdminUsers extends Component
 {
-    public string $search = '';
+    public $users;
     public $roles;
 
-    public function mount(): void
+    public function mount()
     {
-        if (!Auth::user()->hasRole('Admin')) abort(403);
-        $this->roles = Role::orderBy('name')->get();
+        if (!Auth::user()->hasRole('Admin')) {
+            abort(403);
+        }
+        $this->roles = Role::all();
+        $this->loadUsers();
     }
 
-    public function getUsersProperty()
+    public function loadUsers()
     {
-        return User::with('roles')
-            ->when($this->search, fn($q) =>
-                $q->where(fn($q2) => $q2
-                    ->where('name',  'like', '%' . $this->search . '%')
-                    ->orWhere('email', 'like', '%' . $this->search . '%')))
-            ->orderBy('name')
-            ->get();
+        $this->users = User::with('roles')->orderBy('name')->get();
+    }
+
+    public function updateRole($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 deleteUser(int $userId): void
     {
+        if (!Auth::user()->hasRole('Admin')) abort(403);
+
         if ($userId === Auth::id()) {
-            $this->dispatch('notify', 'No puedes eliminarte a ti mismo.');
+            session()->flash('error', 'No puedes eliminarte a ti mismo.');
             return;
         }
         User::findOrFail($userId)->delete();
-        $this->dispatch('notify', 'Usuario eliminado.');
+        session()->flash('message', 'Usuario eliminado.');
+        $this->loadUsers();
     }
 
     public function render()
     {
         return view('livewire.admin-users');
     }
-}
+}