Wire admin studio SSR and search infrastructure

app/Http/Controllers/Api/Posts/PostSearchController.php

@@ -37,8 +37,12 @@ class PostSearchController extends Controller
                 ->where('status', Post::STATUS_PUBLISHED)
                 ->paginate($perPage, 'page', $page);
 
-            // Load relations
             $results->load($this->feedService->publicEagerLoads());
+            if ($viewerId) {
+                $results->getCollection()->loadExists([
+                    'saves as viewer_saved' => fn ($saveQuery) => $saveQuery->where('user_id', $viewerId),
+                ]);
+            }
 
             $formatted = $results->getCollection()
                 ->map(fn ($post) => $this->feedService->formatPost($post, $viewerId))
@@ -57,6 +61,9 @@ class PostSearchController extends Controller
         } catch (\Exception $e) {
             // Fallback: basic LIKE search on body
             $paginated = Post::with($this->feedService->publicEagerLoads())
+                ->withExists([
+                    'saves as viewer_saved' => fn ($saveQuery) => $saveQuery->where('user_id', $viewerId),
+                ])
                 ->where('status', Post::STATUS_PUBLISHED)
                 ->where('visibility', Post::VISIBILITY_PUBLIC)
                 ->where(function ($q) use ($query) {