Wire admin studio SSR and search infrastructure

tests/Feature/Recommendations/SimilarArtworksHybridTest.php

@@ -428,3 +428,38 @@ it('produces cosine-normalized weights in pair builder', function () {
     // S_beh = 2 / sqrt(2 * 2) = 2 / 2 = 1.0
     expect($pair->weight)->toBe(1.0);
 });
+
+it('accumulates pair weights across small user chunks and rebuilds cleanly on rerun', function () {
+    $userA = User::factory()->create();
+    $userB = User::factory()->create();
+    $art1 = createPublicArtwork();
+    $art2 = createPublicArtwork();
+
+    DB::table('artwork_favourites')->insert([
+        ['user_id' => $userA->id, 'artwork_id' => $art1->id, 'created_at' => now()->subMinute(), 'updated_at' => now()->subMinute()],
+        ['user_id' => $userA->id, 'artwork_id' => $art2->id, 'created_at' => now()->subMinute(), 'updated_at' => now()->subMinute()],
+        ['user_id' => $userB->id, 'artwork_id' => $art1->id, 'created_at' => now(), 'updated_at' => now()],
+        ['user_id' => $userB->id, 'artwork_id' => $art2->id, 'created_at' => now(), 'updated_at' => now()],
+    ]);
+
+    $job = new RecBuildItemPairsFromFavouritesJob(1);
+    $job->handle();
+
+    $pair = RecItemPair::query()
+        ->where('a_artwork_id', min($art1->id, $art2->id))
+        ->where('b_artwork_id', max($art1->id, $art2->id))
+        ->first();
+
+    expect($pair)->not->toBeNull();
+    expect($pair?->weight)->toBe(1.0);
+
+    $job->handle();
+
+    $rebuiltPair = RecItemPair::query()
+        ->where('a_artwork_id', min($art1->id, $art2->id))
+        ->where('b_artwork_id', max($art1->id, $art2->id))
+        ->first();
+
+    expect($rebuiltPair)->not->toBeNull();
+    expect($rebuiltPair?->weight)->toBe(1.0);
+});