Add multi-image support for task completions and documents

- Add TaskCompletionImage and DocumentImage models with one-to-many relationships
- Update admin panel to display images for completions and documents
- Add image arrays to API request/response DTOs
- Update repositories with Preload("Images") for eager loading
- Fix seed SQL execution to use raw SQL instead of prepared statements
- Fix table names in seed file (admin_users, push_notifications_*)
- Add comprehensive seed test data with 34 completion images and 24 document images
- Add subscription limitations admin feature with toggle
- Update admin sidebar with limitations link

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

internal/repositories/document_repo.go

@@ -23,6 +23,7 @@ func (r *DocumentRepository) FindByID(id uint) (*models.Document, error) {
 	var document models.Document
 	err := r.db.Preload("CreatedBy").
 		Preload("Task").
+		Preload("Images").
 		Where("id = ? AND is_active = ?", id, true).
 		First(&document).Error
 	if err != nil {
@@ -35,6 +36,7 @@ func (r *DocumentRepository) FindByID(id uint) (*models.Document, error) {
 func (r *DocumentRepository) FindByResidence(residenceID uint) ([]models.Document, error) {
 	var documents []models.Document
 	err := r.db.Preload("CreatedBy").
+		Preload("Images").
 		Where("residence_id = ? AND is_active = ?", residenceID, true).
 		Order("created_at DESC").
 		Find(&documents).Error
@@ -46,6 +48,7 @@ func (r *DocumentRepository) FindByUser(residenceIDs []uint) ([]models.Document,
 	var documents []models.Document
 	err := r.db.Preload("CreatedBy").
 		Preload("Residence").
+		Preload("Images").
 		Where("residence_id IN ? AND is_active = ?", residenceIDs, true).
 		Order("created_at DESC").
 		Find(&documents).Error
@@ -57,6 +60,7 @@ func (r *DocumentRepository) FindWarranties(residenceIDs []uint) ([]models.Docum
 	var documents []models.Document
 	err := r.db.Preload("CreatedBy").
 		Preload("Residence").
+		Preload("Images").
 		Where("residence_id IN ? AND is_active = ? AND document_type = ?",
 			residenceIDs, true, models.DocumentTypeWarranty).
 		Order("expiry_date ASC NULLS LAST").
@@ -72,6 +76,7 @@ func (r *DocumentRepository) FindExpiringWarranties(residenceIDs []uint, days in
 	var documents []models.Document
 	err := r.db.Preload("CreatedBy").
 		Preload("Residence").
+		Preload("Images").
 		Where("residence_id IN ? AND is_active = ? AND document_type = ? AND expiry_date > ? AND expiry_date <= ?",
 			residenceIDs, true, models.DocumentTypeWarranty, now, threshold).
 		Order("expiry_date ASC").
@@ -121,5 +126,20 @@ func (r *DocumentRepository) CountByResidence(residenceID uint) (int64, error) {
 
 // FindByIDIncludingInactive finds a document by ID including inactive ones
 func (r *DocumentRepository) FindByIDIncludingInactive(id uint, document *models.Document) error {
-	return r.db.Preload("CreatedBy").First(document, id).Error
+	return r.db.Preload("CreatedBy").Preload("Images").First(document, id).Error
+}
+
+// CreateDocumentImage creates a new document image
+func (r *DocumentRepository) CreateDocumentImage(image *models.DocumentImage) error {
+	return r.db.Create(image).Error
+}
+
+// DeleteDocumentImage deletes a document image
+func (r *DocumentRepository) DeleteDocumentImage(id uint) error {
+	return r.db.Delete(&models.DocumentImage{}, id).Error
+}
+
+// DeleteDocumentImages deletes all images for a document
+func (r *DocumentRepository) DeleteDocumentImages(documentID uint) error {
+	return r.db.Where("document_id = ?", documentID).Delete(&models.DocumentImage{}).Error
 }