fix: errors in middleware do not abort the request

backend/internal/middleware/file_size_limit.go

@@ -19,6 +19,7 @@ func (m *FileSizeLimitMiddleware) Add(maxSize int64) gin.HandlerFunc {
 		if err := c.Request.ParseMultipartForm(maxSize); err != nil {
 			err = &common.FileTooLargeError{MaxSize: formatFileSize(maxSize)}
 			c.Error(err)
+			c.Abort()
 			return
 		}
 		c.Next()

backend/internal/middleware/jwt_auth.go

@@ -29,6 +29,7 @@ func (m *JwtAuthMiddleware) Add(adminOnly bool) gin.HandlerFunc {
 				return
 			} else {
 				c.Error(&common.NotSignedInError{})
+				c.Abort()
 				return
 			}
 		}

backend/internal/middleware/rate_limit.go

@@ -32,6 +32,7 @@ func (m *RateLimitMiddleware) Add(limit rate.Limit, burst int) gin.HandlerFunc {
 		limiter := getLimiter(ip, limit, burst)
 		if !limiter.Allow() {
 			c.Error(&common.TooManyRequestsError{})
+			c.Abort()
 			return
 		}