public function getCollectionsForPage(
    string $page,
    $sectorId = null,
    $categoryId = null,
    $tagId = null,
    $user = null
): Collection {
    $now = now();
    $dayOfWeek = $now->format('D');
    $currentTime = $now->format('H:i');

    return ContentCollection::where('is_active', true)
        ->get()
        ->filter(function($collection) use (
            $page, $sectorId, $categoryId, $tagId,
            $user, $dayOfWeek, $currentTime
        ) {
            // 1. Placement Rules Check ⭐ YENİ!
            if (!$this->checkPlacementRules(
                $collection,
                $page,
                $sectorId,
                $categoryId,
                $tagId
            )) {
                return false;
            }

            // 2. Display Rules Check (mevcut)
            if (!$this->checkDisplayRules(
                $collection,
                $dayOfWeek,
                $currentTime,
                $sectorId
            )) {
                return false;
            }

            // 3. Visibility Conditions Check (mevcut)
            if (!$this->checkVisibilityConditions(
                $collection,
                $user
            )) {
                return false;
            }

            return true;
        })
        ->sortBy(function($collection) {
            return $collection->placement_rules['position'] ?? 999;
        });
}

private function checkPlacementRules(
    $collection,
    $page,
    $sectorId,
    $categoryId,
    $tagId
): bool {
    $rules = $collection->placement_rules;

    // Page check
    if (isset($rules['pages']) && !in_array($page, $rules['pages'])) {
        return false;
    }

    // Sector check
    if (isset($rules['sector_ids']) && $rules['sector_ids'] !== null) {
        if ($sectorId && !in_array($sectorId, $rules['sector_ids'])) {
            return false;
        }
    }

    // Category check
    if (isset($rules['category_ids']) && $rules['category_ids'] !== null) {
        if ($categoryId && !in_array($categoryId, $rules['category_ids'])) {
            return false;
        }
    }

    // Tag check
    if (isset($rules['tag_ids']) && $rules['tag_ids'] !== null) {
        if ($tagId && !in_array($tagId, $rules['tag_ids'])) {
            return false;
        }
    }

    return true;
}