feat(KAN-19): add responsive permission-aware navigation

app/Http/Middleware/HandleInertiaRequests.php

@@ -4,6 +4,7 @@ namespace App\Http\Middleware;
 
 use App\Actions\Permissions\PermissionService;
 use App\Enums\Permission;
+use App\Models\Project;
 use Illuminate\Http\Request;
 use Inertia\Middleware;
 
@@ -60,6 +61,36 @@ class HandleInertiaRequests extends Middleware
                 'user' => $user,
             ],
             'sidebarOpen' => ! $request->hasCookie('sidebar_state') || $request->cookie('sidebar_state') === 'true',
+            'navigation' => fn (): array => [
+                'project' => $this->projectNavigation($request),
+            ],
+        ];
+    }
+
+    /**
+     * @return array{id: int, name: string, key: string, canManage: bool, canCreateTickets: bool}|null
+     */
+    private function projectNavigation(Request $request): ?array
+    {
+        $project = $request->route('project');
+        $user = $request->user();
+
+        if (! $project instanceof Project || $user === null) {
+            return null;
+        }
+
+        $permissions = $this->permissionService->effectivePermissions($user, $project);
+
+        if (! in_array(Permission::ProjectRead, $permissions, true)) {
+            return null;
+        }
+
+        return [
+            'id' => $project->id,
+            'name' => $project->name,
+            'key' => $project->key,
+            'canManage' => in_array(Permission::ProjectAdmin, $permissions, true),
+            'canCreateTickets' => in_array(Permission::ProjectWrite, $permissions, true),
         ];
     }
 }