Pipe And List Regression Fixes

Goal

Fix the two real regressions introduced by the recent perf cuts:

• pathless inject.nodeProps must survive the wrapped element path in pipeRenderElement(...)
• unordered list visuals must still work for non-paragraph list blocks

Plan

1. Add regression tests for wrapped-element inject props.
2. Add regression tests for unordered list visuals on non-paragraph blocks.
3. Fix the shared element path.
4. Fix the list plugin targeting.
5. Verify with targeted tests, build, and typecheck.

Outcome

Kept.

• pipeRenderElement(...) now preserves pathless injected props on the wrapped directional path
• active belowNodes wrappers no longer get skipped by the fast path
• unordered list-item styling is no longer paragraph-only