I am also using a intercepting filter as authorization component but I am drawing a dependency from my jsp to the filter.
My reason for this is that even though there is perhaps no direct dependency, nevertheless all (http) requests originating from, say a button that was clicked, on the jsp will eventually pass thru the filter.
So one could argue that there is maybe "just" an indirect dependency, but a dependency nonetheless.
Another reason is more of an esthetic kind: having a component on a diagram with no links (dependency, association, ...) what so ever to any other component on the diagram just doesn't "look" good. It is as if the component has no purpose, so why put it on the diagram in the first place.
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