fix(han-planning): correct two defects in the visual-material reference material

[mxriverlynn]

Fixes the two defects reported in #187, both in han-planning reference material and both about how a planning run handles visual material.

The truncated invariant

plan-a-feature/references/artifact-invariants.md ended mid-clause on the Visual Reference invariant, stopping after the word "with". Step 8 tells the synthesizer to read that file and preserve the invariants it carries, so a run that received visual material was asked to preserve a rule whose definition was unfinished.

The missing clause was lost when the file was extracted from SKILL.md in d01abe6. I recovered it from that commit's parent, where the same invariant reads in full at line 655. It is restored verbatim: the table lists every item the boundary record records as received, under that exact heading, with an inline embed beside the prose describing each state.

The empty visual-material table

planning-boundary-rule.md said the Visual Material Received section takes None received when nothing arrived, then showed the section as a table with two illustrative rows. Nothing said the table itself goes away. A run that followed the shape it was shown wrote a placeholder row, and the Step 9 completeness gate refused it, because the gate reads every row as an item claimed on disk.

The rule now says None received stands alone and the table is omitted, and names the gate as the reason.

Verification

npm run lint passes. Both changes are prose in reference files with no script or schema behavior attached.

Closes #187.