feat: Implement read cursor activity tracking and recent activity dashboard with context

app/Http/Controllers/LedgerController.php

@@ -5,6 +5,7 @@ namespace App\Http\Controllers;
 use App\Http\Requests\StoreLedgerRequest;
 use App\Models\Dynamic;
 use App\Models\Ledger;
+use App\Services\ActivityService;
 use Illuminate\Http\Request;
 use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
 use Inertia\Inertia;
@@ -53,10 +54,12 @@ class LedgerController extends Controller
     /**
      * Display the specified resource.
      */
-    public function show(Request $request, Dynamic $dynamic, Ledger $ledger)
+    public function show(Request $request, Dynamic $dynamic, Ledger $ledger, ActivityService $activityService)
     {
         $this->authorize('view', $ledger);
 
+        $activityService->updateCursor($request->user(), $ledger);
+
         $dynamic->load('chat', 'participants');
 
         $ledger->load([