feat: add file deduplication and hash checking for uploads

- Implemented SHA-256 hashing for uploaded files to enable deduplication.
- Added CheckHash method to verify if a file with the same hash already exists.
- Updated Upload method to reuse existing media assets if a duplicate is found.
- Introduced a new hash column in the media_assets table to store file hashes.
- Enhanced the upload process to include progress tracking and hash calculation.
- Modified frontend to check for existing files before uploading and to show upload progress.
- Added vuedraggable for drag-and-drop functionality in the content editing view.

backend/app/http/v1/common.go

@@ -35,7 +35,7 @@ func (c *Common) Upload(
 	if form != nil {
 		val = form.Type
 	}
-	return services.Common.Upload(ctx.Context(), user.ID, file, val)
+	return services.Common.Upload(ctx, user.ID, file, val)
 }
 
 // Get options (enums)
@@ -50,3 +50,19 @@ func (c *Common) Upload(
 func (c *Common) GetOptions(ctx fiber.Ctx) (*dto.OptionsResponse, error) {
 	return services.Common.Options(ctx)
 }
+
+// Check file hash for deduplication
+//
+// @Router /v1/upload/check [get]
+// @Summary Check hash
+// @Description Check if file hash exists
+// @Tags Common
+// @Accept json
+// @Produce json
+// @Param hash query string true "File Hash"
+// @Success 200 {object} dto.UploadResult
+// @Bind user local key(__ctx_user)
+// @Bind hash query
+func (c *Common) CheckHash(ctx fiber.Ctx, user *models.User, hash string) (*dto.UploadResult, error) {
+	return services.Common.CheckHash(ctx, user.ID, hash)
+}